74LVC652 Datasheet, PDF (3/14 Pages) NXP Semiconductors – Octal transceiver/register with dual enable 3-State

Philips Semiconductors
Octal transceiver/register with dual enable (3-State)
Product specification
74LVC652
PIN CONFIGURATION
CP _AB 1
S _AB 2
OE _AB 3
A0 4
A1 5
A2 6
A3 7
A4 8
A5 9
A ₆ 10
A ₇ 11
GND 12
24 V _CC
23 CP _BA
22 S _BA
21 OE _BA
20 B ₀
19 B ₁
18 B ₂
17 B ₃
16 B ₄
15 B ₅
14 B ₆
13 B ₇
PIN DESCRIPTION
PIN NUMBER SYMBOL
1
CP_AB
2
S_AB
3
OE_AB
4, 5, 6, 7, 8,
9, 10, 11
A₀ to A₇
12
GND
20, 19, 18, 17,
16, 15, 14, 13
B₀ to B₇
21
OE_BA
22
S_BA
23
CP_BA
24
V_CC
FUNCTION
‘A’ to ‘B’ clock input
(LOW-to-HIGH, edge-triggered)
Select ‘A’ to ‘B’ source input
Output enable B to A input
(active LOW)
‘A’ data inputs/outputs
Ground (0V)
‘B’ data inputs/outputs
Output enable A to B input
Select ‘B’ to ‘A’ source input
‘B’ to ‘A’ clock input
(LOW-to-HIGH, edge-triggered)
Positive supply voltage
SV00767
FUNCTION TABLE
INPUTS
OE_AB OE_BA CP_AB CP_BA
S_AB
S_BA
L
H
H or L H or L
X
X
L
H
↑
↑
X
X
X
H
↑
H or L
X
X
H
H
↑
↑
L
X
L
X
H or L
↑
X
X
L
L
↑
↑
X
L
L
L
X
X
X
L
L
L
X
H or L
X
H
H
H
X
X
L
X
H
H
H or L
X
H
X
DATA I/O *
A₀ to A₇
B₀ to B₇
input
input
input
input
un *
output
un *
output
input
input
output
input
input
output
H
L
H or L H or L
H
H
output
output
* The data output functions may be enabled or disabled by
various signals at the OE_AB and OE_BA inputs. Data input
functions are always enabled, i.e., data at the bus inputs will
be stored on every LOW-to-HIGH transition on the clock
inputs.
un = unspecified
H = HIGH voltage level
L = LOW voltage level
X = Don’t care
↑ = LOW–to–HIGH level transition
FUNCTION
isolation
store A and B data
store A, hold B,
store A in both registers
hold A, store B,
store B in both registers
real-time B data to A bus
stored B data to A bus
real-time A data to B bus
stored A data to B bus
stored A data to B bus and
stored B data to A bus
1998 Jul 29
3