M27C64A-15F1 STMicroelectronics, M27C64A-15F1 Datasheet - Page 10
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M27C64A-15F1
Manufacturer Part Number
M27C64A-15F1
Description
IC EPROM 64KBIT 150NS 28CDIP
Manufacturer
STMicroelectronics
Specifications of M27C64A-15F1
Format - Memory
EPROMs
Memory Type
UV EPROM
Memory Size
64K (8K x 8)
Speed
150ns
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
Capacitance, Input
6 pF
Capacitance, Output
12 pF
Current, Input, Leakage
±10 μA (Read)
Current, Operating
30 mA (Read)
Current, Output, Leakage
±10 μA (Read)
Current, Supply
30 mA (Max.)
Density
64K
Organization
8K×8
Package Type
FDIP28W
Temperature, Operating
0 to +70 °C
Temperature, Operating, Maximum
85 °C
Temperature, Operating, Minimum
-40 °C
Time, Access
150 ns
Time, Fall
≤20 ns
Time, Rise
≤20 ns
Voltage, Input, High
6 V (Read)
Voltage, Input, High Level
2 V (Min.)
Voltage, Input, Low
0.8 V (Read)
Voltage, Input, Low Level
-0.3 V (Max.)
Voltage, Output, High
4.3 V (Read)
Voltage, Output, Low
0.4 V (Read)
Voltage, Programmable
11.5 V (Min.)
Voltage, Supply
5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-1685-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
M27C64A-15F1
Manufacturer:
ST
Quantity:
5 380
Company:
Part Number:
M27C64A-15F1
Manufacturer:
ST
Quantity:
5 380
Part Number:
M27C64A-15F1
Manufacturer:
ST
Quantity:
20 000
Device operation
2.7
2.8
2.9
2.10
10/22
Program Inhibit
Programming of multiple M27C64A in parallel with different data is also easily
accomplished. Except for E, all like inputs including G of the parallel M27C64A may be
common. A TTL low level pulse applied to a M27C64A P input, with E low and V
will program that M27C64A. A high level E input inhibits the other M27C64A from being
programmed.
Program Verify
A verify (read) should be performed on the programmed bits to determine that they were
correctly programmed. The verify is accomplished with E and G at V
12.5V and V
Electronic Signature
The Electronic Signature (ES) mode allows the reading out of a binary code from an
EPROM that will identify its manufacturer and type. This mode is intended for use by
programming equipment to automatically match the device to be programmed with its
corresponding programming algorithm. The ES mode is functional in the 25°C ± 5°C
ambient temperature range that is required when programming the M27C64A. To activate
the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of
the M27C64A, with V
device outputs by toggling address line A0 from V
held at V
Byte 0 (A0 = V
code. For the STMicroelectronics M27C64A, these two identifier bytes are given in
Electronic Signature
Erasure operation (applies to UV EPROMs)
The erasure characteristics of the M27C64A is such that erasure begins when the cells are
exposed to light with wavelengths shorter than approximately 4000 Å. It should be noted
that sunlight and some type of fluorescent lamps have wavelengths in the 3000-4000 Å
range. Research shows that constant exposure to room level fluorescent lighting could
erase a typical M27C64A in about 3 years, while it would take approximately 1 week to
cause erasure when exposed to direct sunlight. If the M27C64A is to be exposed to these
types of lighting conditions for extended periods of time, it is suggested that opaque labels
be put over the M27C64A window to prevent unintentional erasure. The recommended
erasure procedure for the M27C64A is exposure to short wave ultraviolet light which has a
wavelength of 2537 Å. The integrated dose (i.e. UV intensity x exposure time) for erasure
should be a minimum of 15 W-sec/cm
15 to 20 minutes using an ultraviolet lamp with 12000 µW/cm
should be placed within 2.5 cm (1 inch) of the lamp tubes during the erasure. Some lamps
have a filter on their tubes which should be removed before erasure.
IL
during Electronic Signature mode.
CC
IL
at 6V.
) represents the manufacturer code and byte 1 (A0=V
and can be read-out on outputs Q7 to Q0.
PP
= V
CC
= 5V. Two identifier bytes may then be sequenced from the
2
. The erasure time with this dosage is approximately
IL
to V
IH
. All other address lines must be
2
power rating. The M27C64A
IL
IH
, P at V
) the device identifier
IH
, V
PP
M27C64A
PP
at 12.5V,
Table 3:
at