Datasheet

SN74ALVCH16652
16-BIT BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCES034A – JULY 1995 – REVISED FEBRUARY 1999
3–252
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
INPUTS
DATA I/O
†
OPERATION OR
OEAB OEBA CLKAB CLKBA SAB SBA A1–A8 B1–B8
FUNCTION
L H H or L H or L X X Input Input Isolation
L H ↑↑X X Input Input Store A and B data
X H ↑ H or L X X Input Unspecified
‡
Store A, hold B
H H ↑↑X
‡
X Input Output Store A in both registers
L X H or L ↑ X X Unspecified
‡
Input Hold A, store B
L L ↑↑XX
‡
Output Input Store B in both registers
L L X X X L Output Input Real-time B data to A bus
L L X H or L X H Output Input Stored B data to A bus
H H X X L X Input Output Real-time A data to B bus
H H H or L X H X Input Output Stored A data to B bus
H L H or L H or L H H Output Output
Stored A data to B bus and
stored B data to A bus
†
The data output functions may be enabled or disabled by a variety of level combinations at the OEAB or OEBA
inputs. Data
input functions are always enabled; i.e., data at the bus pins is stored on every low-to-high transition of the clock inputs.
‡
Select control = L; clocks can occur simultaneously
Select control = H; clocks must be staggered in order to load both registers
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