74hct652 NXP Semiconductors, 74hct652 Datasheet - Page 4

• Manufacturer Part Number: 74hct652
• Description: Octal Bus Transceiver/register; 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTION TABLE
Notes
1. H = HIGH voltage level
2. The data output functions may be enabled or disabled by various signals at OE
September 1993
OE
Octal bus transceiver/register; 3-state
X
H
H
H
H
L
L
L
L
L
L
L = LOW voltage level
X = don’t care
functions are always enabled, i.e., data at the bus inputs will be stored on every LOW-to-HIGH transition on the clock
inputs.
AB
= LOW-to-HIGH transition
OE
H
H
H
H
X
H
H
L
L
L
L
BA
Fig.4 Functional diagram.
H or L H or L
H or L
H or L
H or L H or L
INPUTS
CP
X
X
X
AB
H or L
H or L
CP
(1)
X
X
X
BA
S
X
X
X
X
X
X
X
H
H
L
L
AB
S
H
H
X
X
X
X
X
X
X
L
L
BA
Not specified
A
1
Output
THRU A
Ouput
Ouput
Input
Input
Input
Input
DATA I/O
4
8
Not specified
B
(2)
1
Output
Output
Output
THRU B
Input
Input
Input
Input
8
AB
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
and OE
OPERATION OR FUNCTION
BA
74HC/HCT652
HC/HCT652
inputs. Data input
Product specification