M27C512-10C1 STMicroelectronics, M27C512-10C1 Datasheet - Page 5

• Manufacturer Part Number: M27C512-10C1
• Manufacturer: STMicroelectronics

Specifications of M27C512-10C1

• Density: 512Kb
• Organization: 64Kx8
• Interface Type: Parallel
• Bus Type: Parallel
• In System Programmable: External
• Access Time (max): 100ns
• Package Type: PLCC
• Reprogramming Technique: OTP
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 50mA
• Pin Count: 32
• Mounting: Surface Mount
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

M27C512
2
2.1
2.2
Device operation
The modes of operations of the M27C512 are listed in the Operating Modes table. A single
power supply is required in the read mode. All inputs are TTL levels except for GV
12V on A9 for Electronic Signature.
Read mode
The M27C512 has two control functions, both of which must be logically active in order to
obtain data at the outputs. Chip Enable (E) is the power control and should be used for
device selection. Output Enable (G) is the output control and should be used to gate data to
the output pins, independent of device selection. Assuming that the addresses are stable,
the address access time (t
available at the output after a delay of t
been low and the addresses have been stable for at least t
Standby mode
The M27C512 has a standby mode which reduces the active current from 30mA to 100µA
The M27C512 is placed in the standby mode by applying a CMOS high signal to the E input.
When in the standby mode, the outputs are in a high impedance state, independent of the
GV
Table 3.
1.
Table 4.
Read
Output Disable
Program
Program Inhibit
Standby
Electronic Signature
Manufacturer’s
Code
Device Code
PP
X = V
Identifier
input.
IH
or V
Operating modes
Electronic Signature
Mode
IL
, V
ID
= 12V ± 0.5V.
V
A0
V
IH
IL
AVQV
Q7
0
0
) is equal to the delay from E to output (t
(1)
Q6
0
0
V
IL
GLQV
V
V
V
V
V
Pulse
E
IH
IH
IL
IL
IL
Q5
1
1
from the falling edge of G, assuming that E has
Q4
0
1
GV
V
V
V
V
V
X
PP
PP
IH
IL
IL
PP
Q3
0
1
AVQV
Q2
-t
0
1
GLQV
V
A9
X
X
X
X
X
.
ID
Q1
0
0
ELQV
Device operation
Q0
). Data is
0
1
Data Out
Data In
Q7-Q0
Codes
PP
Hex Data
Hi-Z
Hi-Z
Hi-Z
3Dh
20h
and
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