WS57C45 STMicroelectronics, WS57C45 Datasheet - Page 3

• Manufacturer Part Number: WS57C45
• Description: HIGH-SPEED 2K x 8 REGISTERED CMOS PROM/RPROM
• Manufacturer: STMicroelectronics

BLOCK DIAGRAM
TEST LOAD
AC READ TIMING DIAGRAM
2.01 V
D.U.T.
A
O
0
0
INIT
-A
-O
OE
CP
OE
OE/OE
(High Impedance Test Systems)
10
7
S
INIT
A
CP
A
A
A
A
A
A
A
A
A
A
10
98
S
9
8
7
6
5
4
3
2
1
0
DECODER
DECODER
COLUMN
1 OF 64
1 OF 32
t
t
ROW
SOE
PWC
t
CO
t
PWI
t
DI
S
30 pF
(INCLUDING SCOPE
AND JIG
CAPACITANCE)
t
RI
t
PROGRAMMABLE
t
HOE
PWC
t
HZC
S
64
ARRAY
D
C
X
256
Q
t
t
SOE
PWC
S
t
t
HOE
PWC
t
t
HA
LZC
PROGRAMMABLE
MULTIPLEXER
S
MULTIPLEXER
A.C. TESTING INPUT/OUTPUT WAVEFORM
8
X
t
1 OF 32
SOE
t
t
PWC
SA
A.C. testing inputs are driven at 3.0 V for a logic “1” and 0.0 V
for a logic “0.” Timing measurements are made at 1.5 V for
input and output transitions in both directions.
S
t
t
3.0
0.0
HOE
t
PWC
HA
t
CO
S
1.5
TRIGGERED
REGISTER
t
HZOE
EDGE-
8-BIT
CP
POINTS
TEST
t
LZOE
1.5
O
O
O
O
O
O
O
O
7
6
5
4
3
2
1
0
WS57C45
2-23