SN74ALS299
SN74ALS299 is 8-BIT UNIVERSAL SHIFT/STORAGE REGISTER manufactured by Texas Instruments.
description
These 8-bit universal shift /storage registers feature multiplexed I/O ports to achieve full 8-bit data handling in a single 20-pin package. Two function-select (S0, S1) inputs and two outputenable (OE1, OE2) inputs can be used to choose the modes of operation listed in the function table.
CLR GND
SR CLK B/QB
SN54ALS299 . . . J PACKAGE SN74ALS299 . . . DW OR N PACKAGE
(TOP VIEW)
S0 1
OE1 2
OE2 3
G/QG 4 E/QE 5 C/QC 6 A/QA 7
QA′ 8 CLR 9
GND 10
20 VCC 19 S1
18 SL
17 QH′ 16 H/QH 15 F/QF 14 D/QD 13 B/QB 12 CLK
11 SR
SN54ALS299 . . . FK PACKAGE (TOP VIEW)
OE2 OE1 S0 VCC S1
G/QG E/QE C/QC A/QA
QA′
3 2 1 20 19
9 10 11 12 13
QH′ H/QH F/QF D/QD
Synchronous parallel loading is acplished by taking both S0 and S1 high. This places the 3-state outputs in the high-impedance state and permits data applied on the I/O ports to be clocked into the register. Reading out of the register can be acplished while the outputs are enabled in any mode. Clearing occurs asynchronously when the clear (CLR) input is low. Taking either OE1 or OE2 high disables the outputs, but has no effect on clearing, shifting, or storing data.
The SN54ALS299 is characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74ALS299 is characterized for operation from 0°C to 70°C.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
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Copyright © 1994, Texas Instruments Incorporated...
