M87C257-12F1 STMicroelectronics, M87C257-12F1 Datasheet - Page 17

• Manufacturer Part Number: M87C257-12F1
• Description: IC EPROM 256KBIT 120NS 28CDIP
• Manufacturer: STMicroelectronics

Specifications of M87C257-12F1

• Format - Memory: EPROMs
• Memory Type: UV EPROM
• Memory Size: 256K (32K x 8)
• Speed: 120ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-CDIP (0.600", 15.24mm) Window
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

M87C257
Figure 8.
Table 11.
1. T
2. V
Symbol
t
t
t
t
t
t
t
t
VPHEL
VCHEL
t
t
EHQX
GHQZ
GHAX
QVEL
QXGL
GLQV
ELEH
AVEL
A
CC
V CC
= 25 °C; V
A0-A14
Q0-Q7
ASV PP
E
G
must be applied simultaneously with or before V
t
t
t
t
t
t
t
Alt
t
t
VPS
VCS
OES
DFP
t
PW
DS
DH
OE
AH
AS
Programming and Verify modes AC waveforms
Programming mode AC characteristics
CC
= 6.25V ± 0.25V; V
Address Valid to Chip Enable Low
Input Valid to Chip Enable Low
V
V
Chip Enable Program Pulse Width
Chip Enable High to Input Transition
Input Transition to Output Enable Low
Output Enable Low to Output Valid
Output Enable High to Output Hi-Z
Output Enable High to Address
Transition
PP
CC
High to Chip Enable Low
High to Chip Enable Low
tVPHEL
tVCHEL
tQVEL
tAVEL
tELEH
DATA IN
Parameter
PROGRAM
PP
= 12.75V ± 0.25V
VALID
PP
tEHQX
and removed simultaneously or after V
tQXGL
(1) (2)
Condition
VERIFY
tGLQV
DATA OUT
Test
DC and AC parameters
Min
95
2
2
2
2
2
2
0
0
tGHQZ
tGHAX
PP
Max
105
100
130
AI00557
.
Unit
17/22
µs
µs
µs
µs
µs
µs
µs
ns
ns
ns