M27C160-90B1 STMicroelectronics, M27C160-90B1 Datasheet - Page 11

• Manufacturer Part Number: M27C160-90B1
• Description: IC OTP 16MBIT 90NS 42DIP
• Manufacturer: STMicroelectronics

Specifications of M27C160-90B1

• Format - Memory: EPROMs
• Memory Type: OTP EPROM
• Memory Size: 16M (2M x 8 or 1M x 16)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

M27C160
Note:
2.10
Erasure operation (applies to UV EPROM)
ambient temperature range that is required when programming the M27C160. To activate
the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of
the M27C160, with V
device outputs by toggling address line A0 from V
held at V
code and byte 1 (A0 = V
these two identifier bytes are given in
Table 3.
Outputs Q15-Q8 are set to '0'.
The erasure characteristics of the M27C160 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 M27C160 in about 3 years, while it would take approximately 1 week to
cause erasure when exposed to direct sunlight. If the M27C160 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 M27C160 window to prevent unintentional erasure. The recommended
erasure procedure for M27C160 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 30 W-sec/cm
30 to 40 minutes using an ultraviolet lamp with 12000 µW/cm
should be placed within 2.5cm (1 inch) of the lamp tubes during the erasure. Some lamps
have a filter on their tubes which should be removed before erasure.
Manufacturer’s Code
Device Code
Identifier
IL
during Electronic Signature mode. Byte 0 (A0 = V
Electronic Signature
PP
= V
IH
V
V
) the device identifier code. For the STMicroelectronics M27C160,
A0
IH
IL
CC
= 5V. Two identifier bytes may then be sequenced from the
Q7
0
1
Table 3
2.
Q6
0
0
The erasure time with this dosage is approximately
Q5
and can be read-out on outputs Q7 to Q0.
1
1
IL
Q4
to V
0
1
IH
Q3
. All other address lines must be
0
0
IL
2
) represents the manufacturer
power rating. The M27C160
Q2
0
0
Q1
0
0
Device description
Q0
0
1
Hex Data
B1h
20h
11/26