M27128A-1F6 STMicroelectronics, M27128A-1F6 Datasheet - Page 2

• Manufacturer Part Number: M27128A-1F6
• Description: NMOS 16K 2K x 8 UV EPROM
• Manufacturer: STMicroelectronics

M2716
Table 2. Absolute Maximum Ratings
Note: Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings" may cause
permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those
indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods
may affect device reliability. Refer also to the SGS-THOMSON SURE Program and other relevant quality documents.
Figure 2. DIP Pin Connections
DEVICE OPERATION
The M2716 has 3 modes of operation in the normal
system environment. These are shown in Table 3.
Read Mode. The M2716 read operation requires
that G = V
have been stabilized. Valid data will appear on the
output pins after time t
Switching Time Waveforms) depending on which is
limiting.
2/9
Symbol
T
T
V
V
V
P
T
BIAS
STG
CC
PP
IO
A
D
IL
V SS
, EP = V
Q0
Q1
Q2
A7
A6
A5
A4
A3
A2
A1
A0
Ambient Operating Temperature
Temperature Under Bias
Storage Temperature
Supply Voltage
Input or Output Voltages
Program Supply
Power Dissipation
1
2
3
4
5
6
7
8
9
10
11
12
IL
M2716
and that addresses A0-A10
AVQV
AI00785
, t
24
23
22
21
20
19
18
17
16
15
14
13
GLQV
Parameter
V CC
A8
A9
V PP
G
A10
EP
Q7
Q6
Q5
Q4
Q3
or t
ELQV
(see
grade 6
grade 1
grade 6
grade 1
Deselect Mode. The M2716 is deselected by mak-
ing G = V
the condition of the addresses. The outputs are
Hi-Z when G = V
M2716’s for memory expansion.
Standby Mode (Power Down). The M2716 may
be powered down to the standby mode by making
EP = V
ically puts the outputs in the Hi-Z state. The power
is reduced to 25% (132 mW max) of the normal
operating power. V
at 5V. Access time at power up remains either t
or t
Programming
The M2716 is shipped from SGS-THOMSON com-
pletely erased. All bits will be at “1" level (output
high) in this initial state and after any full erasure.
Table 3 shows the 3 programming modes.
Program Mode. The M2716 is programmed by
introducing “0"s into the desired locations. This is
done 8 bits (a byte) at a time. Any individual address,
sequential addresses, or addresses chosen at ran-
dom may be programmed. Any or all of the 8 bits
associated with an address location may be pro-
grammed with a single program pulse applied to the
EP pin. All input voltage levels including the program
pulse on chip enable are TTL compatible.
The programming sequence is: with V
= 5V, G = V
and the desired data word is applied to the output
pins (V
data). After the address and data signals are stable
the program pin is pulsed from V
ELQV
IL
IH
(see Switching Time Waveforms).
. This is independent of G and automat-
= “0" and V
IH
IH
. This mode is independent of EP and
and EP = V
IH
–0.3 to 6
–0.3 to 26.5
–0.3 to 6
. This allows tied-OR of 2 or more
–40 to 85
–10 to 80
–50 to 95
–65 to 125
CC
0 to 70
Value
IH
and V
1.5
= ”1" for both address and
IL
, an address is selected
PP
must be maintained
IL
PP
to V
= 25V, V
Unit
IH
W
V
V
V
C
C
C
with a
AVQV
CC