M27C512-90C1 STMicroelectronics, M27C512-90C1 Datasheet - Page 9
![IC OTP 512KBIT 90NS 32PLCC](/photos/7/23/72383/497-32-plcc_series_sml.jpg)
M27C512-90C1
Manufacturer Part Number
M27C512-90C1
Description
IC OTP 512KBIT 90NS 32PLCC
Manufacturer
STMicroelectronics
Datasheet
1.M27C512-90B6.pdf
(22 pages)
Specifications of M27C512-90C1
Format - Memory
EPROMs
Memory Type
OTP EPROM
Memory Size
512K (64K x 8)
Speed
90ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Package / Case
32-PLCC
Memory Configuration
64K X 8
Access Time
90ns
Supply Voltage Range
4.5V To 5.5V
Memory Case Style
PLCC
No. Of Pins
32
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
M27C512-90C1
Manufacturer:
ST
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1 143
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Manufacturer:
STMicroelectronics
Quantity:
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Part Number:
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Manufacturer:
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Part Number:
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M27C512
3
Erasure operation (applies for UV EPROM)
The erasure characteristics of the M27C512 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 M27C512 in about 3 years, while it would take approximately 1 week to cause
erasure when exposed to direct sunlight. If the M27C512 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 M27C512 window to prevent unintentional erasure. The recommended erasure
procedure for the M27C512 is exposure to short wave ultraviolet light which has wavelength
2537 Å. The integrated dose (i.e. UV intensity x exposure time) for erasure should be a
minimum of 15 W-sec/cm
minutes using an ultraviolet lamp with 12000 µW/cm
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.
2
. The erasure time with this dosage is approximately 15 to 20
Erasure operation (applies for UV EPROM)
2
power rating. The M27C512 should be
9/22