PI74ALVCH16652V Просмотр технического описания (PDF) - Pericom Semiconductor
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PI74ALVCH16652V Datasheet PDF : 7 Pages
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PI74ALVCH16652
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Product Pin Description
Pin Name
Description
OEAB
Output Enable Inputs (Active HIGH)
OEBA
Output Enable Inputs (Active LOW)
xCLKAB, xCLKBA Clock Pulse Inputs
xSAB, xSBA
Select Control Inputs
xAx
Data Register A Inputs, Data Register B Outputs
xBx
Data Register B Inputs, Data Register A Outputs
GND
Ground
VCC
Power
Truth Table(1)
Inputs
OEAB OEBA CLKAB CLKBA SAB SBA
Data I/O*
A1 - A8
B1 - B8
Operation or Function
L
H H or L H or L X X
Input
Input Isolation
L
H
↑
↑
XX
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
↑
↑
X X** Output
Input Store B in both registers
L
L
X
X
XL
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
LX
Input
Output Real-time A data to B bus
H
H H or L
X
HX
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 & stored B data to A bus
Notes:
1. H = High Voltage Level, X = Dont Care,
L = Low Voltage Level, ↑= LOW-to-HIGH Transition
* The data output functions may be enabled or disabled by a varietyof level combinations at the OEAB or OEBA
inputs. Data input functions are always enabled, i.e., data at the bus pins will be stored on every LOW-to-HIGH
transition on the clock inputs.
** Select control = L; clocks can occur simultaneously. Select control = H; to load both registers,
clocks must be staggered.
3
PS8135B 11/06/00
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