SN74AS286
SN74AS286 is 9-Bit Parity Generators/Checker manufactured by Texas Instruments.
description
SN54AS286, SN74AS286 9ĆBIT PARITY GENERATORS/CHECKERS
WITH BUSĆDRIVER PARITY I/O PORT
SDAS050B
- DECEMBER 1983
- REVISED DECEMBER 1994
SN54AS286 . . . J PACKAGE SN74AS286 . . . D OR N PACKAGE
(TOP VIEW)
G1 H2 XMIT 3 I4 PARITY ERROR 5 PARITY I/O 6 GND 7
14 VCC 13 F 12 E 11 D 10 C 9B 8A
SN54AS286 . . . FK PACKAGE (TOP VIEW)
The SN54AS286 and SN74AS286 universal 9-bit parity generators/checkers feature a local output for parity checking and a 48-m A bus-driving parity input/output (I/O) port for parity generation/checking. The word-length capability is easily expanded by cascading.
The transmit (XMIT) control input is implemented specifically to acmodate cascading. When XMIT is low, the parity tree is disabled and PARITY ERROR remains at a high logic level regardless of the input levels. When XMIT is high, the parity tree is enabled. PARITY ERROR indicates a parity error when either an even number of inputs ( A- I ) are high and PARITY I/O is forced to a low logic level, or when an odd number of inputs are high and PARITY I/O is forced to a high logic level.
XMIT NC I NC
PARITY ERROR
3 2 1 20 19
17 NC
16 D
15 NC
14 C
9 10 11 12 13
PARITY I/O
- No internal connection
The I/O control circuitry was designed so that the I/O port remains in the high-impedance state during power up or power down to prevent bus glitches.
The SN54AS286 is characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74AS286 is characterized for operation from 0°C to...
