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DS34C87T

www.ti.com

SNLS376B –MAY 1998–REVISED APRIL 2013

DS34C87T CMOS Quad TRI-STATE Differential Line Driver

Check for Samples: DS34C87T

FEATURES

DESCRIPTION

The DS34C87T is a quad differential line driver

• TTL Input Compatible

designed for digital data transmission over balanced

• Typical Propagation Delays: 6 ns

lines. The DS34C87T meets all the requirements of

• Typical Output Skew: 0.5 ns

EIA standard RS-422 while retaining the low power

characteristics of CMOS. This enables the

• Outputs Won't Load Line When V

= 0V

construction of serial and terminal interfaces while

• Meets the Requirements of EIA Standard RS-

maintaining minimal power consumption.

422

The DS34C87T accepts TTL or CMOS input levels

• Operation from Single 5V Supply

and translates these to RS-422 output levels. This

• TRI-STATE Outputs for Connection to System

part uses special output circuitry that enables the

Buses

individual drivers to power down without loading down

the bus. This device has separate enable circuitry for

• Low Quiescent Current

each pair of the four drivers. The DS34C87T is pin

• Available in Surface Mount

compatible to the DS3487T.

All inputs are protected against damage due to

electrostatic discharge by diodes to V

and ground.

Connection and Logic Diagrams

Top View

Figure 2. Logic Diagram

See PIN DESCRIPTIONS for details.

Figure 1. PDIP Package

See Package Numbers D0016A or NFG0016E

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.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (14 pages)

PAGE 1
DS34C87T www.ti.com SNLS376B – MAY 1998 – REVISED APRIL 2013 DS34C87T CMOS Quad TRI-STATE Differential Line Driver Check for Samples: DS34C87T FEATURES DESCRIPTION • • • • • The DS34C87T is a quad differential line driver designed for digital data transmission over balanced lines. The DS34C87T meets all the requirements of EIA standard RS-422 while retaining the low power characteristics of CMOS.
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DS34C87T SNLS376B – MAY 1998 – REVISED APRIL 2013 www.ti.com Truth Table (1) Input (1) Control Non-Inverting Inverting Input Output Output H H H L L H L H X L Z Z L = Low logic state H = High logic state X = Irrelevant Z = TRI-STATE (high performance) These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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DS34C87T www.ti.com SNLS376B – MAY 1998 – REVISED APRIL 2013 DC Electrical Characteristics (1) VCC = 5V ±10% (unless otherwise specified) Parameter VIH Test Conditions High Level Input Min Typ Max 2.0 Units V Voltage VIL Low Level Input 0.
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DS34C87T SNLS376B – MAY 1998 – REVISED APRIL 2013 www.ti.com Switching Characteristics (1) VCC = 5V ±10%, t r, tf ≤ 6 ns (Figure 3, Figure 4, Figure 5, Figure 6) Parameter Test Conditions Min Typ Max Units tPLH, tPHL Propagation Delay Input to Output S1 Open 6 11 ns Skew See (2) S1 Open 0.
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DS34C87T www.ti.com SNLS376B – MAY 1998 – REVISED APRIL 2013 AC TEST CIRCUIT AND SWITCHING TIME WAVEFORMS Note: C1 = C2 = C3 = 40 pF (including Probe and Jig Capacitance), R1 = R2 = 50Ω, R3 = 500Ω Figure 3. AC Test Circuit Input pulse; f = 1 MHz, 50%, tr ≤ 6 ns, tf ≤ 6ns Figure 4. Propagation Delays Figure 6. Differential Rise and Fall Times Figure 7. Propagation Delays Test Circuit for “LS-Type” Load Figure 5.
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DS34C87T SNLS376B – MAY 1998 – REVISED APRIL 2013 www.ti.com Figure 8. Differential Rise and Fall Times Test Circuit for “LS-Type” Load Figure 9. Load Enable and Disable Times Test Circuit for “LS-Type” Load Figure 10. Load Propagation Delays for “LS-Type” Load Figure 11. Load Enable and Disable Times for “LS-Type” Load TYPICAL APPLICATIONS *RT is optional although highly recommended to reduce reflection.
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DS34C87T www.ti.
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DS34C87T SNLS376B – MAY 1998 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision A (April 2013) to Revision B • 8 Page Changed layout of National Data Sheet to TI format ............................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 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.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant DS34C87TMX SOIC D 16 2500 330.0 16.4 6.5 10.3 2.3 8.0 16.0 Q1 DS34C87TMX/NOPB SOIC D 16 2500 330.0 16.4 6.5 10.3 2.3 8.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DS34C87TMX SOIC D 16 2500 367.0 367.0 35.0 DS34C87TMX/NOPB SOIC D 16 2500 367.0 367.0 35.
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