SN74LS243
FEATURES
- Two-Way Asynchronous munication Between Data Buses
- PNP Inputs Reduce D-C Loading
- Hysteresis (Typically 400 m V) at Inputs
Improves Noise Margin
SN54LS243 . . . J OR W PACKAGE SN74LS243 . . . D, N, OR NS PACKAGE
(TOP VIEW)
GAB NC A1 A2 A3 A4
1 2 3 4 5 6 7
14 VCC 13 GBA 12 NC 11 B1 10 B2 9 B3 8 B4
FUNCTION TABLE (EACH TRANSCEIVER)
INPUTS
SNxx LS243
A to B B to A Isolation Latch A and B (A = B)
DESCRIPTION
These four-data-line transceivers are designed for asynchronous two-way munications between data buses. SN74LS243 can be used to drive terminated lines down to 133 Ω.
SN54LS243 is characterized for operation over the full military temperature range of
- 55°C to 125°C. SN74LS243 is characterized for operation from 0°C to 70°C.
SCHEMATICS OF INPUTS AND OUTPUTS
TYPICAL OF ALL OUTPUTS
17 kΩ
INPUT
EQUIVALENT OF EACH INPUT
50 Ω NOM
OUTPUT
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