DM74AS286N Fairchild Semiconductor, DM74AS286N Datasheet

IC PARITY GEN/CHKER 9BIT 14DIP

DM74AS286N

Manufacturer Part Number
DM74AS286N
Description
IC PARITY GEN/CHKER 9BIT 14DIP
Manufacturer
Fairchild Semiconductor
Series
74ASr
Datasheet

Specifications of DM74AS286N

Logic Type
Parity Generator/Checker
Number Of Circuits
9-Bit
Current - Output High, Low
15mA, 48mA; 2mA, 20mA
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
14-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
74AS286
© 2000 Fairchild Semiconductor Corporation
DM74AS286M
DM74AS286N
DM74AS286
9-Bit Parity Generator/Checker
with Bus-Driver Parity I/O Port
General Description
These universal, 9-bit parity generators/checkers utilize
advanced Schottky high performance circuitry and feature
odd/even outputs to facilitate operation of either odd or
even parity applications. The word length capability is eas-
ily expanded by cascading.
The DM74AS286 can be used to upgrade the performance
of most systems utilizing the DM74AS280 parity generator/
checker. Although the DM74AS286 is implemented without
expander inputs, the corresponding function is provided by
the availability of an input pin XMIT. XMIT is a control line
which makes parity error output active and parity an input
port when HIGH; when LOW, parity error output is inactive
and parity becomes an output port. In addition, parity I/O
control circuitry contains a feature to keep the I/O port in
the 3-STATE during power UP or DOWN to prevent bus
glitches.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Order Number
Package Number
M14A
N14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DS006305
Number of Inputs
Features
Function Table
L
H
N/A
that are HIGH
PNP inputs to reduce bus loading
Generates either odd or even parity for nine data lines
Inputs are buffered to lower the drive requirements
Can be used to upgrade existing systems using MSI
parity circuits
Cascadable for n-bits
Switching specifications at 50 pF
Switching specifications guaranteed over full
temperature and V
A parity I/O portable to drive bus
LOW Logic Level
HIGH Logic Level
0, 2, 4, 6, 8
1, 3, 5, 7, 9
0, 2, 4, 6, 8
0, 2, 4, 6, 8
1, 3, 5, 7, 9
1, 3, 5, 7, 9
(A thru I)
Not Applicable
Package Description
Input Output
N/A
N/A
CC
H
H
Parity I/O
L
L
range
N/A
N/A
N/A
N/A
H
L
October 1986
Revised April 2000
XMIT
H
H
H
H
L
L
www.fairchildsemi.com
Parity
Error
H
H
H
H
L
L
Operation
Generator
Checker
Checker
Mode
Parity
Parity
Parity
of

Related parts for DM74AS286N

DM74AS286N Summary of contents

Page 1

... Package Number DM74AS286M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow DM74AS286N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. ...

Page 2

Absolute Maximum Ratings Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range Typical JA N Package M Package Recommended Operating Conditions Symbol Parameter V Supply Voltage CC V HIGH Level Input Voltage IH V LOW Level Input ...

Page 3

Switching Characteristics over recommended supply and temperature range Symbol Parameter t Propagation Delay Time PLH from LOW-to-HIGH Level Output t Propagation Delay Time PHL from HIGH-to-LOW Level Output t Propagation Delay Time PLH from LOW-to-HIGH Level Output t Propagation Delay ...

Page 4

Typical Applications (Continued) Direction Control Direction (XMIT) (Parity I/O) H (Receive) L (Transmit) L LOW Logic Level H HIGH Logic Level N/A Not Applicable FIGURE 2. Bus I/O Parity Implementation www.fairchildsemi.com I/O Parity Check Result (Parity Error) Level Input H ...

Page 5

Typical Applications (Continued) Note: Parity format in this configuration is “odd parity” FIGURE 3. 90-Bit Parity Generator/Checker Implementation Using Device Expansion Techniques 5 www.fairchildsemi.com ...

Page 6

Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow www.fairchildsemi.com Package Number M14A 6 ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right ...

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