m27c405 STMicroelectronics, m27c405 Datasheet - Page 7

• Manufacturer Part Number: m27c405
• Description: 4 Mbit 512kb X 8 Otp Eprom
• Manufacturer: STMicroelectronics

Table 9. Programming Mode DC Characteristics
(T
Note: 1. V
Table 10. Programming Mode AC Characteristics
(T
Note: 1. V
Programming
When delivered, all bits of the M27C405 are in the
’1’ state.Data is introduced by selectively program-
ming ’0’s into the desired bit locations. Although
only ’0’s will be programmed, both ’1’s and ’0’s can
be present in the data word. The M27C405 is in
the programming mode when V
Symbol
A
A
Symbol
t
t
t
t
t
t
t
t
VPHEL
VCHEL
t
V
t
= 25 °C; V
V
= 25 °C; V
GHQZ
EHQX
QXGL
GLQV
GHAX
I
V
V
QVEL
ELEH
I
V
AVEL
I
CC
PP
2. Sampled only, not 100% tested.
OH
OL
LI
IH
ID
IL
CC
CC
must be applied simultaneously with or before V
must be applied simultaneously with or before V
Input Leakage Current
Supply Current
Program Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage TTL
A9 Voltage
CC
CC
t
t
t
t
t
t
VCS
t
OES
t
t
Alt
t
VPS
DFP
PW
DH
OE
AS
DS
AH
= 6.25V ± 0.25V; V
= 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
Parameter
PP
CC
High to Chip Enable Low
High to Chip Enable Low
Parameter
PP
PP
PP
input is at
= 12.75V ± 0.25V)
= 12.75V ± 0.25V)
PP
PP
and removed simultaneously or after V
and removed simultaneously or after V
Test Condition
0
I
OH
I
(1)
OL
(1)
E = V
V
= –400µA
= 2.1mA
12.75V, G is at V
to be programmed is applied to 8 bits in parallel to
the data output pins. The levels required for the
address and data inputs are TTL. V
to be 6.25V ±0.25V.
IN
IL
V
CC
Test Condition
IH
and E is pulsed to V
–0.3
11.5
Min
2.4
2
PP
PP
.
.
Min
95
2
2
2
2
2
0
0
2
V
CC
Max
12.5
±10
0.8
0.4
50
50
+ 0.5
Max
CC
105
100
130
IL
is specified
M27C405
. The data
Unit
mA
mA
V
V
V
V
V
A
Unit
µs
µs
µs
µs
µs
µs
µs
ns
ns
ns
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