Datasheet

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DS8922, DS8922A, DS8923A

www.ti.com

SNLS373B –JUNE 1998–REVISED APRIL 2013

DS8922/DS8922A/DS8923A TRI-STATE RS-422 Dual Differential Line Driver and Receiver

Pairs

Check for Samples: DS8922, DS8922A, DS8923A

FEATURES

DESCRIPTION

• 12 ns Typical Propagation Delay

The DS8922/22A and DS8923A are Dual Differential

• Output Skew—±0.5 ns Typical

Line Driver and Receiver pairs. These devices are

• Meets the Requirements of EIA Standard RS-

designed specifically for applications meeting the

422

ST506, ST412 and ESDI Disk Drive Standards. In

addition, the devices meet the requirements of the

• Complementary Driver Outputs

EIA Standard RS-422.

• High Differential or Common-Mode Input

These devices offer an input sensitivity of 200 mV

Voltage Ranges of ±7V

over a ±7V common mode operating range.

• ±0.2V Receiver Sensitivity over the Input

Hysteresis is incorporated (typically 70 mV) to

Voltage Range

improve noise margin for slowly changing input

• Receiver Input Fail-Safe Circuitry

waveforms. An input fail-safe circuit is provided such

that if the receiver inputs are open the output

• Receiver Input Hysteresis—70 mV typical

assumes the logical one state.

• Glitch Free Power Up/Down

The DS8922A and DS8923A drivers are designed to

• TRI-STATE Outputs

provide unipolar differential drive to twisted pair or

parallel wire transmission lines. Complementary

outputs are logically ANDed and provide an output

skew of 0.5 ns (typ.) with propagation delays of 12

ns.

Both devices feature TRI-STATE outputs. The

DS8922/22A have independent control functions

common to a driver and receiver pair. The DS8923A

has separate driver and receiver control functions.

Power up/down circuitry is featured which will TRI-

STATE the outputs and prevent erroneous glitches on

the transmission lines during system power up or

power down operation.

The DS8922/22A and DS8923A are designed to be

compatible with TTL and CMOS.

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 (20 pages)

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DS8922, DS8922A, DS8923A www.ti.com SNLS373B – JUNE 1998 – REVISED APRIL 2013 DS8922/DS8922A/DS8923A TRI-STATE RS-422 Dual Differential Line Driver and Receiver Pairs Check for Samples: DS8922, DS8922A, DS8923A FEATURES 1 • • • 2 • • • • • • • 12 ns Typical Propagation Delay Output Skew—±0.5 ns Typical Meets the Requirements of EIA Standard RS422 Complementary Driver Outputs High Differential or Common-Mode Input Voltage Ranges of ±7V ±0.
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DS8922, DS8922A, DS8923A SNLS373B – JUNE 1998 – REVISED APRIL 2013 www.ti.com 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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DS8922, DS8922A, DS8923A www.ti.com SNLS373B – JUNE 1998 – REVISED APRIL 2013 DS8922/22A EN1 EN2 RO1 RO2 DO1 DO2 0 0 ACTIVE ACTIVE ACTIVE ACTIVE 1 0 HI-Z ACTIVE HI-Z ACTIVE 0 1 ACTIVE HI-Z ACTIVE HI-Z 1 1 HI-Z HI-Z HI-Z HI-Z DEN REN RO1 RO2 DO1 DO2 0 0 ACTIVE ACTIVE ACTIVE ACTIVE 1 0 ACTIVE ACTIVE HI-Z HI-Z 0 1 HI-Z HI-Z ACTIVE ACTIVE 1 1 HI-Z HI-Z HI-Z HI-Z DS8923A Absolute Maximum Ratings (1) (2) Supply Voltage 7V −0.
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DS8922, DS8922A, DS8923A SNLS373B – JUNE 1998 – REVISED APRIL 2013 www.ti.com DS8922/22A and DS8923A Electrical Characteristics (1) (2) (3) Symbol Conditions Min Typ Max Units +200 mV RECEIVER VTH −7V ≤ VCM ≤ +7V −200 ±35 VHYST −7V ≤ VCM ≤ +7V 15 70 RIN V IN = −7V, +7V (Other Input = GND) 4.0 6.0 IIN VIN = 10V 3.25 mA VIN = −10V −3.25 mA mV kΩ VOH V CC = MIN, IOH = − 400 μA VOL V CC = MAX, IOL = 8 mA ISC V CC = MAX, VOUT = 0V −15 VOH V CC = MIN, IOH = −20 mA 2.
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DS8922, DS8922A, DS8923A www.ti.com SNLS373B – JUNE 1998 – REVISED APRIL 2013 Driver Switching Characteristics Parameter Conditions Min Typ Max Units 8922 8922A/23A SINGLE ENDED CHARACTERISTICS (Figure 4, Figure 5, Figure 6, and Figure 8) TpLH CL = 30 pF 12 15 15 ns TpHL CL = 30 pF 12 15 15 ns TTLH CL = 30 pF 5 10 10 ns TTHL CL = 30 pF 5 10 10 ns |TpLH–T pHL| CL = 30 pF Skew CL = 30 pF 0.5 5 3.5 ns 0.5 3.0 2.0 ns 0.
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DS8922, DS8922A, DS8923A SNLS373B – JUNE 1998 – REVISED APRIL 2013 www.ti.com Figure 2. Figure 3. S1 S2 S3 TPLZ Closed Open +2.5V TPHZ Open Closed −2.5V TPZL Closed Open +2.5V TPZH Open Closed −2.5V Figure 4. Figure 5.
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DS8922, DS8922A, DS8923A www.ti.com SNLS373B – JUNE 1998 – REVISED APRIL 2013 Figure 6. Figure 7. Figure 8.
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DS8922, DS8922A, DS8923A SNLS373B – JUNE 1998 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (DS8923A) 8 Driver VOH vs IOH vs Temperature Driver VOH vs IOH vs VCC Figure 9. Figure 10. Driver VOL vs IOL vs Temperature Driver VOL vs IOL vs VCC Figure 11. Figure 12. Receiver V OH vs IOH vs Temperature Receiver VOH vs IOH vs VCC Figure 13. Figure 14.
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DS8922, DS8922A, DS8923A www.ti.com SNLS373B – JUNE 1998 – REVISED APRIL 2013 Typical Performance Characteristics (continued) (DS8923A) Receiver V OL vs IOL vs Temperature Receiver VOL vs IOL vs VCC Figure 15. Figure 16. Driver Differential Propagation Delay vs Temperature Driver Differential Propagation Delay vs VCC Figure 17. Figure 18. Receiver Propagation Delay vs Temperature Receiver Propagation Delay vs VCC Figure 19. Figure 20.
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DS8922, DS8922A, DS8923A SNLS373B – JUNE 1998 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) (DS8923A) 10 Driver VOD vs Temperature Driver VOD vs VCC Figure 21. Figure 22. Driver VOD vs RL Driver Differential Transition Time vs Temperature Figure 23. Figure 24. Driver Differential Transition Time vs VCC Supply Current vs Temperature Figure 25. Figure 26.
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DS8922, DS8922A, DS8923A www.ti.com SNLS373B – JUNE 1998 – REVISED APRIL 2013 Typical Performance Characteristics (continued) (DS8923A) Supply Current vs V CC ICC vs Driver Switching Frequency Figure 27. Figure 28. Driver Short Circuit Current vs Temperature Driver Short Circuit Current vs VCC Figure 29. Figure 30. Receiver Short Circuit Current vs Temperature Receiver Short Circuit Current vs VCC Figure 31. Figure 32.
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DS8922, DS8922A, DS8923A SNLS373B – JUNE 1998 – REVISED APRIL 2013 www.ti.com TYPICAL APPLICATIONS Figure 33. ESDI Application Figure 34. Figure 35. ST504 and ST412 Applications Figure 36.
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DS8922, DS8922A, DS8923A www.ti.com SNLS373B – JUNE 1998 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision A (April 2013) to Revision B • 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 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device DS8922AMX/NOPB Package Package Pins Type Drawing SOIC D 16 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 16.4 Pack Materials-Page 1 6.5 B0 (mm) K0 (mm) P1 (mm) 10.3 2.3 8.0 W Pin1 (mm) Quadrant 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DS8922AMX/NOPB SOIC D 16 2500 367.0 367.0 35.
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MECHANICAL DATA NFG0016E N0016E N16E (Rev G) www.ti.
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