Read Differential Bus Transceiver (Rev. A) text version

SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

D D D D D D D D D D D D D D

Bidirectional Transceiver Meets or Exceeds the Requirements of ANSI Standards EIA/TIA-422-B and ITU Recommendation V.11 Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments 3-State Driver and Receiver Outputs Individual Driver and Receiver Enables Wide Positive and Negative Input /Output Bus Voltage Ranges Driver Output Capability . . . ± 60 mA Max Thermal-Shutdown Protection Driver Positive- and Negative-Current Limiting Receiver Input Impedance . . . 12 k Min Receiver Input Sensitivity . . . ± 200 mV Receiver Input Hysteresis . . . 50 mV Typ Operates From Single 5-V Supply Low Power Requirements

D OR P PACKAGE (TOP VIEW)

R RE DE D

1 2 3 4

8 7 6 5

VCC B A GND

description

The SN75176A differential bus transceiver is a monolithic integrated circuit designed for bidirectional data communication on multipoint bus-transmission lines. It is designed for balanced transmission lines and meets ANSI Standard EIA/TIA-422-B and ITU Recommendation V.11. The SN75176A combines a 3-state differential line driver and a differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, that can be externally connected together to function as a direction control. The driver differential outputs and the receiver differential inputs are connected internally to form differential input /output (I/O) bus ports that are designed to offer minimum loading to the bus whenever the driver is disabled or VCC = 0. These ports feature wide positive and negative common-mode voltage ranges making the device suitable for party-line applications. The driver is designed to handle loads up to 60 mA of sink or source current. The driver features positive- and negative-current limiting and thermal shutdown for protection from line fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150°C. The receiver features a minimum input impedance of 12 k, an input sensitivity of ± 200 mV, and a typical input hysteresis of 50 mV. The SN75176A can be used in transmission-line applications employing the SN75172 and SN75174 quadruple differential line drivers and SN75173 and SN75175 quadruple differential line receivers. The SN75176A is characterized for operation from 0°C to 70°C.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright © 1995, Texas Instruments Incorporated

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

Function Tables

DRIVER INPUT D H L X ENABLE DE H H L RECEIVER DIFFERENTIAL INPUTS A­B VID 0.2 V ­ 0.2 V < VID < 0.2 V VID ­ 0.2 V X Open ENABLE RE L L L H L OUTPUT R H ? L Z ? OUTPUTS A H L Z B L H Z

H = high level, L = low level, ? = indeterminate, X = irrelevant, Z = high impedance (off)

logic symbol

DE RE 3 2 EN1 EN2 6 7

logic diagram (positive logic)

DE D 1 1 A B RE R 3 4 2 1 6 7 A B Bus

D

4

R

1

2

This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

schematics of inputs and outputs

EQUIVALENT OF EACH INPUT VCC R(eq) 16.8 k NOM 960 NOM 960 NOM TYPICAL OF A AND B I/O PORTS VCC TYPICAL OF RECEIVER OUTPUT VCC 85 NOM

Input

Output

GND Driver input: R(eq) = 3 k NOM Enable inputs: R(eq) = 8 k NOM R(eq) = equivalent resistor Input/Output Port

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage range at any bus terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­ 10 V to 15 V Enable input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­ 65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values, except differential input/output bus voltage, are with respect to network ground terminal. DISSIPATION RATING TABLE PACKAGE D P TA 25°C POWER RATING 725 mW 1100 mW DERATING FACTOR ABOVE TA = 25°C 5.8 mW/°C 8.8 mW/°C TA = 70_C POWER RATING 464 mW 704 mW TA = 105_C POWER RATING 261 mW 396 mW

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

recommended operating conditions

MIN Supply voltage, VCC Voltage at any bus terminal (separately or common mode), VI or VIC High-level input voltage, VIH Low-level input voltage, VIL D, DE, and RE D, DE, and RE Driver Receiver Driver Receiver 4.75 ­7 2 0.8 ± 12 ­ 60 ­ 400 60 8 TYP 5 MAX 5.25 12 UNIT V V V V V mA µA mA °C

Differential input voltage, VID (see Note 2) High-level High level output current IOH current, Low level output current, IOL current Low-level

Operating free-air temperature, TA 0 70 NOTE 2: Differential-input/output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B.

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

DRIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

PARAMETER VIK VOH VOL |VOD1| |VOD2| |VOD| VOC |VOC| IO IIH IIL IOS Input clamp voltage High-level High level output voltage Low level output voltage Low-level Differential output voltage Differential output voltage Change in magnitude of differential output voltage Common-mode output voltage§ Change in magnitude of common-mode output g g voltage Output current High-level input current Low-level input current Short-circuit output current Output disabled, , See Note 3 VI = 2.4 V VI = 0.4 V VO = ­ 7 V VO = VCC VO = 12 V ICC Supply current (total package) No load Outputs enabled Outputs disabled 35 26 VO = 12 V VO = ­ 7 V RL = 54 or 100 , See Figure 1 TEST CONDITIONS II = ­ 18 mA VIH = 2 V, , IOH = ­ 33 mA VIH = 2 V, , IOH = 33 mA IO = 0 RL = 100 , RL = 54 , VIL = 0.8 V, , VIL = 0.8 V, , 3.7 37 11 1.1 2VOD2 See Figure 1 See Figure 1 2 1.5 2.7 2.4 ± 0.2 3 ±0 2 0.2 1 ­ 0.8 20 ­ 400 ­ 250 250 500 50 40 mA mA MIN TYP MAX ­ 1.5 UNIT V V V V V V V V mA µA µA

All typical values are at VCC = 5 V and TA = 25°C. |VOD| and |VOC| are the changes in magnitude of VOD and VOC respectively, that occur when the input is changed from a high level to a low level. § In ANSI Standard EIA/TIA-422-B, VOC, which is the average of the two output voltages with respect to GND, is called output offset voltage, VOS. NOTE 3: This applies for both power on and off; refer to ANSI Standard EIA/TIA-422-B for exact conditions.

switching characteristics, VCC = 5 V, TA = 25°C

PARAMETER td(OD) tt(OD) tPZH tPZL tPHZ tPLZ Differential-output delay time Differential-output transition time Output enable time to high level Output enable time to low level Output disable time from high level Output disable time from low level TEST CONDITIONS RL = 60 , RL = 110 , RL = 110 , RL = 110 , RL = 110 , See Figure 3 See Figure 4 See Figure 5 See Figure 4 See Figure 5 MIN TYP 40 65 55 30 85 20 MAX 60 95 90 50 130 40 UNIT ns ns ns ns ns ns

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

RECEIVER SECTION electrical characteristics over recommended ranges of common-mode input voltage, supply voltage, and operating free-air temperature (unless otherwise noted)

PARAMETER VIT + VIT­ Vhys VIK VOH VOL IOZ II IIH IIL ri IOS ICC Positive-going input threshold voltage Negative-going input threshold voltage Input hysteresis voltage (VIT + ­ VIT ­) Enable clamp voltage High-level High level output voltage Low-level Low level output voltage High-impedance-state output current Line input current High-level enable input current Low-level enable input current Input resistance Short-circuit output current Supply current (total package) No load Outputs enabled Outputs disabled II = ­ 18 mA VID = 200 mV, , See Figure 2 VID = ­ 200 mV, , See Figure 2 VO = 0.4 V to 2.4 V Other input = 0 V, , See Note 3 VIH = 2.7 V VIL = 0.4 V 12 ­ 15 35 26 ­ 85 50 40 VI = 12 V VI = ­ 7 V IOH = ­ 400 µ , µA, IOL = 8 mA, , 2.7 27 0.45 0 45 ± 20 1 ­ 0.8 20 ­ 100 TEST CONDITIONS VO = 2.7 V, VO = 0.5 V, IO = ­ 0.4 mA IO = 8 mA MIN ­ 0.2 50 ­ 1.5 TYP MAX 0.2 UNIT V V mV V V V µA mA µA µA k mA mA

All typical values are at VCC = 5 V, TA = 25°C. The algebraic convention, in which the less-positive (more-negative) limit is designated minimum, is used in this data sheet for common-mode input voltage and threshold voltage levels only. NOTE 3: This applies for both power on and power off. Refer to ANSI Standard EIA/TIA-422-B for exact conditions.

switching characteristics, VCC = 5 V, CL = 15 pF, TA = 25°C

PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay time, low-to-high-level output Propagation delay time, high-to-low-level output Output enable time to high level Output enable time to low level Output disable time from high level Output disable time from low level TEST CONDITIONS VID = ­ 1.5 V to 1.5 V, 15 15V See Figure 7 See Figure 7 See Figure 6 MIN TYP 21 23 10 12 20 17 MAX 35 35 30 30 35 25 UNIT ns ns ns ns ns ns

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

PARAMETER MEASUREMENT INFORMATION

RL VOD2 2 RL 2 VOC

VID VOH 0V VOL +IOL ­ IOH

Figure 1. Driver VOD and VOC

Figure 2. Receiver VOH and VOL

3V Input CL = 50 pF (see Note B) Output td(OD) Output CL 50% 10% 90% 1.5 V 1.5 V 0V td(OD) 2.5 V 50% 10% ­ 2.5 V tt(OD)

Generator (see Note A)

RL = 60 50 3V

tt(OD)

TEST CIRCUIT

VOLTAGE WAVEFORMS

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, 50% duty cycle, tr 6 ns, tf 6 ns, ZO = 50 . B. CL includes probe and jig capacitance.

Figure 3. Driver Test Circuit and Voltage Waveforms

Output S1 0 or 3 V CL = 50 pF (see Note B) RL = 110 tPZH Output 2.3 V tPHZ VOLTAGE WAVEFORMS Input 1.5 V 1.5 V 0V 0.5 V VOH Voff 0 V 3V

Generator (see Note A)

50

TEST CIRCUIT

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, 50% duty cycle, tr 6 ns, tf 6 ns, ZO = 50 . B. CL includes probe and jig capacitance.

Figure 4. Driver Test Circuit and Voltage Waveforms

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

5V RL = 110 Output tPZL CL = 50 pF (see Note B) 50 Output 2.3 V tPLZ Input 1.5 V 1.5 V

3V 0V

S1 3 V or 0

Generator (see Note A)

5V 0.5 V VOL

TEST CIRCUIT

VOLTAGE WAVEFORMS

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, 50% duty cycle, tr 6 ns, tf 6 ns, ZO = 50 . B. CL includes probe and jig capacitance.

Figure 5. Driver Test Circuit and Voltage Waveforms

3V Generator (see Note A) 51 1.5 V CL = 15 pF (see Note B) 0V tPLH Output 1.3 V tPHL VOH 1.3 V VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, 50% duty cycle, tr 6 ns, tf 6 ns, ZO = 50 . B. CL includes probe and jig capacitance. Output Input 1.5 V 1.5 V 0V

Figure 6. Receiver Test Circuit and Voltage Waveforms

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

1.5 V ­1.5 V

S1 2 k S2 5V

CL = 15 pF (see Note B) Generator (see Note A) 50

5 k

1N916 or Equivalent

S3 TEST CIRCUIT 3V Input 1.5 V S1 to 1.5 V 0 V S2 Open S3 Closed VOH Output 1.5 V 0V Output 1.5 V VOL 3V Input 1.5 V 0V tPHZ VOH Output 1.3 V VOLTAGE WAVEFORMS NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, 50% duty cycle, tr 6 ns, tf 6 ns, ZO = 50 . B. CL includes probe and jig capacitance. 0.5 V VOL tPLZ 1.3 V S1 to 1.5 V S2 Closed S3 Closed Input 1.5 V 0V 3V S1 to ­ 1.5 V S2 Closed S3 Closed 4.5 V Input 3V 1.5 V S1 to ­1.5 V 0 V S2 Closed S3 Open

tPZH

tPZL

0.5 V Output

Figure 7. Receiver Test Circuit and Voltage Waveforms

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

TYPICAL CHARACTERISTICS

DRIVER DRIVER

HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT

5 VOH VOH ­ High-Level Output Voltage ­ V 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0 ­ 20 ­ 40 ­ 60 ­ 80 ­ 100 IOH ­ High-Level Output Current ­ mA ­ 120 VCC = 5 V TA = 25°C VOL ­ Low-Level Output Voltage ­ V 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0

LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT

VCC = 5 V TA = 25°C

20 40 60 80 100 IOL ­ Low-Level Output Current ­ mA

120

Figure 8

DRIVER

Figure 9

RECEIVER

DIFFERENTIAL OUTPUT VOLTAGE vs OUTPUT CURRENT

4 VOD VOD ­ Differential Output Voltage ­ V VOL ­ Low-Level Output Voltage ­ V VOL 3.5 3 2.5 2 1.5 1 0.5 0 VCC = 5 V TA = 25°C 0.6

LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT

VCC = 5 V TA = 25°C 0.5

0.4

0.3

0.2

0

10

20

30 40 50 60 70 80 IO ­ Output Current ­ mA

90 100

Figure 10

10

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ÁÁ ÁÁ ÁÁ

0.1

0 0 5 10 15 20 25 IOL ­ Low Level Output Current ­ mA 30

Figure 11

· DALLAS, TEXAS 75265

SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

TYPICAL CHARACTERISTICS

RECEIVER RECEIVER

LOW-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE

0.5 VOL VOL ­ Low-Levcel Output Voltage ­ V VCC = 5 V VID = ­ 0.2 V IOL = 8 mA VO VO ­ Output Voltage ­ V 5

OUTPUT VOLTAGE vs ENABLE VOLTAGE

VID = 0.2 V Load = 8 k to GND TA = 25°C

0.4

4

VCC = 5.25 V

0.3

3

VCC = 5 V

VCC = 4.75 V

0.2

2

0.1

0 0 10 70 20 30 50 40 60 TA ­ Free-Air Temperature ­ °C 80

Figure 12

RECEIVER

OUTPUT VOLTAGE vs ENABLE VOLTAGE

6 VCC = 5.25 V 5 VO ­ Output Voltage ­ V VO VCC = 4.75 V 4 VCC = 5 V VID = 0.2 V Load = 1 k to VCC TA = 25°C

3

2

1

0 0 0.5 1 1.5 2 VI ­ Enable Voltage ­ V 2.5 3

Figure 14

POST OFFICE BOX 655303

ÁÁ ÁÁ ÁÁ ÁÁ

ÁÁ ÁÁ ÁÁ

1

0 0 0.5 2 1 1.5 VI ­ Enable Voltage ­ V 2.5 3

Figure 13

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SN75176A DIFFERENTIAL BUS TRANSCEIVER

SLLS100A ­ JUNE 1984 ­ REVISED MAY 1995

APPLICATION INFORMATION

SN65176A SN65176A RT RT

Up to 32 Transceivers

NOTE A: The line should be terminated at both ends in its characteristic impedance (RT = ZO). Stub lengths off the main line should be kept as short as possible.

Figure 15. Typical Application Circuit

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PACKAGE OPTION ADDENDUM

www.ti.com

23-Apr-2007

PACKAGING INFORMATION

Orderable Device SN75176AD SN75176ADE4 SN75176ADG4 SN75176ADR SN75176ADRE4 SN75176ADRG4 SN75176AP SN75176APE4

(1)

Status (1) ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE

Package Type SOIC SOIC SOIC SOIC SOIC SOIC PDIP PDIP

Package Drawing D D D D D D P P

Pins Package Eco Plan (2) Qty 8 8 8 8 8 8 8 8 75 75 75 Green (RoHS & no Sb/Br) Green (RoHS & no Sb/Br) Green (RoHS & no Sb/Br)

Lead/Ball Finish CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU

MSL Peak Temp (3) Level-1-260C-UNLIM Level-1-260C-UNLIM Level-1-260C-UNLIM Level-1-260C-UNLIM Level-1-260C-UNLIM Level-1-260C-UNLIM N / A for Pkg Type N / A for Pkg Type

2500 Green (RoHS & no Sb/Br) 2500 Green (RoHS & no Sb/Br) 2500 Green (RoHS & no Sb/Br) 50 50 Pb-Free (RoHS) Pb-Free (RoHS)

The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

19-Mar-2008

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device

Package Package Pins Type Drawing SOIC D 8

SPQ

Reel Reel Diameter Width (mm) W1 (mm) 330.0 12.4

A0 (mm)

B0 (mm)

K0 (mm)

P1 (mm) 8.0

W Pin1 (mm) Quadrant 12.0 Q1

SN75176ADR

2500

6.4

5.2

2.1

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

19-Mar-2008

*All dimensions are nominal

Device SN75176ADR

Package Type SOIC

Package Drawing D

Pins 8

SPQ 2500

Length (mm) 340.5

Width (mm) 338.1

Height (mm) 20.6

Pack Materials-Page 2

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Differential Bus Transceiver (Rev. A)

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