DS8922AM National Semiconductor, DS8922AM Datasheet

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DS8922AM

Manufacturer Part Number
DS8922AM
Description
IC, RS-422 LINE TRANSCEIVER, 5V, NSOIC16
Manufacturer
National Semiconductor
Datasheet

Specifications of DS8922AM

Device Type
Line
Ic Interface Type
RS422
No. Of Drivers
2
Supply Voltage Range
4.5V To 5.5V
Driver Case Style
SOIC
No. Of Pins
16
Operating Temperature Range
0°C To +70°C
Interface Circuit Standard 1
EIA RS-422
Number Of Receivers
2
Number Of Transmitters
2
Number Of Transceivers
1
Data Transmission Topology
Multidrop
Receiver Signal Type
Differential
Transmitter Signal Type
Differential
Single Supply Voltage (typ)
5V
Single Supply Voltage (min)
4.5V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Supply Current
78mA
Power Supply Requirement
Single
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
16
Package Type
SOIC N
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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© 2004 National Semiconductor Corporation
DS8922/DS8922A/DS8923A TRI-STATE
RS-422 Dual Differential Line Driver and Receiver Pairs
General Description
The DS8922/22A and DS8923A are Dual Differential Line
Driver and Receiver pairs. These devices are designed spe-
cifically for applications meeting the ST506, ST412 and
ESDI Disk Drive Standards. In addition, the devices meet the
requirements of the EIA Standard RS-422.
These devices offer an input sensitivity of 200 mV over a
±
rated (typically 70 mV) to improve noise margin for slowly
changing input waveforms. An input fail-safe circuit is pro-
vided such that if the receiver inputs are open the output
assumes the logical one state.
The DS8922A and DS8923A drivers are designed to provide
unipolar differential drive to twisted pair or parallel wire trans-
mission 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.
Connection Diagrams
TRI-STATE
7V common mode operating range. Hysteresis is incorpo-
®
is a registered trademark of National Semiconductor Corp.
DS008511
See NS Package Number M16A or N16E
Order Number DS8922M, DS8922N,
DS8922AM or DS8922AN
DS8922A Dual-In-Line
Power up/down circuitry is featured which will TRI-STATE
the outputs and prevent erroneous glitches on the transmis-
sion lines during system power up or power down operation.
The DS8922/22A and DS8923A are designed to be compat-
ible with TTL and CMOS.
Features
n 12 ns typical propagation delay
n Output skew —
n Meets the requirements of EIA Standard RS-422
n Complementary Driver Outputs
n High differential or common-mode input voltage ranges
n
n Receiver input fail-safe circuitry
n Receiver input hysteresis — 70 mV typical
n Glitch free power up/down
n TRI-STATE outputs
of
±
0.2V receiver sensitivity over the input voltage range
±
7V
00851101
±
®
0.5 ns typical
www.national.com
July 2004

Related parts for DS8922AM

DS8922AM Summary of contents

Page 1

... Receiver input fail-safe circuitry n Receiver input hysteresis — typical n Glitch free power up/down n TRI-STATE outputs DS8922A Dual-In-Line 00851101 Order Number DS8922M, DS8922N, DS8922AM or DS8922AN See NS Package Number M16A or N16E DS008511 July 2004 ® ± 0.5 ns typical www.national.com ...

Page 2

Connection Diagrams DS8922/22A EN1 EN2 DEN REN www.national.com (Continued) DS8923A Dual-In-Line Order Number DS8923AM, DS8923AN, See NS Package Number M16A or N16E RO1 RO2 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Drive Input Voltage Output Voltage Receiver Output Sink Current Receiver Input Voltage Differential Input Voltage Maximum Package Power Dissipation ...

Page 4

Receiver Switching Characteristics (Figures Parameter pLH pHL |T – pLH pHL Skew (Channel to Channel ...

Page 5

Switching Time Waveforms AC Test Circuits and Switching Waveforms 00851103 FIGURE 1. 00851105 FIGURE 2. 5 00851104 www.national.com ...

Page 6

AC Test Circuits and Switching Waveforms www.national.com (Continued) 00851106 Closed Open +2.5V PLZ T Open Closed −2.5V PHZ T Closed Open +2.5V PZL T Open Closed −2.5V PZH FIGURE 3. 00851107 FIGURE 4. 00851108 FIGURE 5. ...

Page 7

AC Test Circuits and Switching Waveforms (Continued) 00851109 FIGURE 6. 00851110 FIGURE 7. 00851113 FIGURE 8. 7 www.national.com ...

Page 8

Typical Performance Characteristics Driver Temperature Driver Temperature Receiver Temperature www.national.com (DS8923A) OH 00851114 OL 00851116 OH 00851118 8 Driver ...

Page 9

Typical Performance Characteristics Receiver Temperature Driver Differential Propagation Delay vs Temperature Receiver Propagation Delay vs Temperature (DS8923A) (Continued) OL 00851120 00851122 00851124 9 Receiver 00851121 Driver Differential ...

Page 10

Typical Performance Characteristics Driver V vs Temperature OD Driver Driver Differential Transition Time www.national.com (DS8923A) (Continued) 00851126 L 00851128 00851130 10 Driver 00851127 Driver Differential Transition Time vs ...

Page 11

Typical Performance Characteristics Supply Current vs V Driver Short Circuit Current vs Temperature Receiver Short Circuit Current vs Temperature (DS8923A) (Continued 00851132 00851134 00851136 11 vs Driver Switching Frequency 00851133 Driver Short Circuit Current ...

Page 12

Typical Applications www.national.com ESDI Application ST504 and ST412 Applications 12 00851111 00851112 ...

Page 13

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS8922M, DS8922AM, or DS8923AM Molded Dual-In-Line Package (N) Order Number DS8922N, DS8922AN, or DS8923AN NS Package Number N16E SO Package (M) NS Package Number M16A 13 www.national.com ...

Page 14

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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