M27C1001-70B1 ST Microelectronics, M27C1001-70B1 Datasheet - Page 8

• Manufacturer Part Number: M27C1001-70B1
• Manufacturer: ST Microelectronics

Specifications of M27C1001-70B1

• Density: 1Mb
• Organization: 128Kx8
• Bus Type: Parallel
• In System Programmable: External
• Reprogramming Technique: OTP
• Access Time (max): 70ns
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 50mA
• Package Type: PDIP
• Pin Count: 32
• Mounting: Through Hole
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

Device description
2
Note:
2.1
2.2
2.3
8/24
Device description
Table 2
Read mode. All inputs are TTL levels except for V
Table 2.
X = V
Read mode
The M27C1001 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 M27C1001 has a standby mode which reduces the supply current from 30mA to 100µA.
The M27C1001 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 G input.
Two-line output control
Because EPROMs are usually used in larger memory arrays, this product features a 2-line
control function which accommodates the use of multiple memory connection. The two line
control function allows:
For the most efficient use of these two control lines, E should be decoded and used as the
primary device selecting function, while G should be made a common connection to all
devices in the array and connected to the READ line from the system control bus. This
Read
Output Disable
Program
Verify
Program Inhibit
Standby
Electronic Signature
the lowest possible memory power dissipation,
complete assurance that output bus contention will not occur.
IH
or V
lists the operating modes of the M27C1001. A single power supply is required in
Mode
IL
, V
Operating Modes
ID
= 12V ± 0.5V.
V
V
V
V
V
V
V
AVQV
E
IH
IH
IL
IL
IL
IL
IL
) is equal to the delay from E to output (t
V
V
V
V
V
GLQV
G
X
X
IH
IH
IL
IL
IL
from the falling edge of G, assuming that E has
V
IL
PP
V
V
Pulse
P
X
X
X
X
IH
IH
and 12V on A9 for Electronic Signature.
AVQV
V
A9
X
X
X
X
X
X
ID
-t
GLQV
V
V
V
.
CC
CC
CC
ELQV
V
V
V
V
V
or V
or V
or V
CC
PP
PP
PP
PP
). Data is
SS
SS
SS
M27C1001
Data Out
Data Out
Data In
Q7-Q0
Codes
Hi-Z
Hi-Z
Hi-Z