DS8921N National Semiconductor, DS8921N Datasheet

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DS8921N

Manufacturer Part Number
DS8921N
Description
IC, RS-422 TRANSCEIVER, 5.5V, MDIP-16
Manufacturer
National Semiconductor
Datasheet

Specifications of DS8921N

Device Type
Line
Ic Interface Type
RS422
No. Of Drivers
1
Supply Voltage Range
4.5V To 5.5V
Driver Case Style
DIP
No. Of Pins
16
Operating Temperature Range
0°C To +70°C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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© 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

DS8921N Summary of contents

Page 1

... 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 Order Number DS8921M, DS8921N, DS8921AM, DS8921AN, Truth Table ≥ ≤ V ...

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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