DS8921N/NOPB National Semiconductor, DS8921N/NOPB Datasheet

IC LINE DRV/RCVR DIFF PAIR 8DIP

DS8921N/NOPB

Manufacturer Part Number
DS8921N/NOPB
Description
IC LINE DRV/RCVR DIFF PAIR 8DIP
Manufacturer
National Semiconductor
Type
Transceiverr
Datasheet

Specifications of DS8921N/NOPB

Number Of Drivers/receivers
1/1
Protocol
RS422
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Number Of Receivers
1
Receiver Signal Type
Differential
Interface Type
EIA-422
Operating Supply Voltage
5 V
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
Through Hole
Supply Current
35 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*DS8921N
*DS8921N/NOPB
DS8921
DS8921N

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS8921N/NOPB
Manufacturer:
NS
Quantity:
1 330
© 2004 National Semiconductor Corporation
DS8921/DS8921A/DS8921AT
Differential Line Driver and Receiver Pair
General Description
The DS8921, DS8921A are Differential Line Driver and Re-
ceiver pairs designed specifically for applications meeting
the ST506, ST412 and ESDI Disk Drive Standards. In addi-
tion, these devices meet the requirements of the EIA Stan-
dard RS-422.
The DS8921, DS8921A receivers offer an input sensitivity of
200 mV over a
teresis is incorporated (typically 70 mV) to improve noise
margin for slowly changing input waveforms.
The DS8921, DS8921A drivers are designed to provide uni-
polar 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.
Connection Diagram
Truth Table
±
7V common mode operating range. Hys-
Order Number DS8921M, DS8921N, DS8921AM, DS8921AN,
V
V
Open
ID
ID
≥ V
≤ V
Input
TH
TH
DS008512
See NS Package Number M08A or N08E
Receiver
(MAX)
(MIN)
DS8921ATM, or DS8921ATN
V
OUT
1
0
1
The DS8921, DS8921A are designed to be compatible with
TTL and CMOS.
Features
n 12 ns typical propagation delay
n Output skew - 0.5 ns typical
n Meet the requirements of EIA Standard RS-422
n Complementary Driver Outputs
n High differential or common-mode input voltage ranges
n
n Receiver input hysteresis-70 mV typical
n DS8921AT industrial temperature
Input
of
operation: (−40˚C to +85˚C)
±
1
0
0.2V receiver sensitivity over the input voltage range
±
7V
Driver
V
00851201
OUT
1
0
V
OUT
0
1
www.national.com
May 1998

Related parts for DS8921N/NOPB

DS8921N/NOPB Summary of contents

Page 1

... Truth Table ≥ ≤ Open © 2004 National Semiconductor Corporation The DS8921, DS8921A are designed to be compatible with TTL and CMOS. Features typical propagation delay n Output skew - 0.5 ns typical n Meet the requirements of EIA Standard RS-422 n Complementary Driver Outputs n High differential or common-mode input voltage ranges ± ...

Page 2

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

Page 3

Receiver Switching Characteristics Figure 1(Figure 2) Symbol Conditions pLH L (Figures pHL L (Figures – pLH pHL L (Figures ...

Page 4

AC Test Circuits and Switching Diagrams FIGURE 1. FIGURE 2. FIGURE 3. FIGURE 4. www.national.com 00851203 00851204 00851205 00851206 4 00851207 FIGURE 5. 00851202 FIGURE 6. 00851210 FIGURE 7. 00851211 FIGURE 8. ...

Page 5

Typical Applications ST506 and ST412 Application ESDI Application 5 00851208 00851209 www.national.com ...

Page 6

Physical Dimensions unless otherwise noted Order Number DS8921M, DS8921AM or DS8921ATM www.national.com inches (millimeters) SO Package (M) NS Package Number M08A Molded Dual-In-Line Package (N) Order Number DS8921N, DS8921AN or DS8921ATN NS Package Number N08E 6 ...

Page 7

... 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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