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M27C256B-12XF7X

Description
32K X 8 UVPROM, 90 ns, CDIP28
Categorystorage    storage   
File Size113KB,16 Pages
ManufacturerSTMicroelectronics
Websitehttp://www.st.com/
Download Datasheet Parametric View All

M27C256B-12XF7X Overview

32K X 8 UVPROM, 90 ns, CDIP28

M27C256B-12XF7X Parametric

Parameter NameAttribute value
MakerSTMicroelectronics
Parts packaging codeDIP
package instructionWDIP,
Contacts28
Reach Compliance Codeunknow
ECCN codeEAR99
Maximum access time120 ns
JESD-30 codeR-GDIP-T28
memory density262144 bi
Memory IC TypeUVPROM
memory width8
Number of functions1
Number of terminals28
word count32768 words
character code32000
Operating modeASYNCHRONOUS
Maximum operating temperature105 °C
Minimum operating temperature-40 °C
organize32KX8
Package body materialCERAMIC, GLASS-SEALED
encapsulated codeWDIP
Package shapeRECTANGULAR
Package formIN-LINE, WINDOW
Parallel/SerialPARALLEL
Certification statusNot Qualified
Maximum seat height5.71 mm
Maximum supply voltage (Vsup)5.25 V
Minimum supply voltage (Vsup)4.75 V
Nominal supply voltage (Vsup)5 V
surface mountNO
technologyCMOS
Temperature levelINDUSTRIAL
Terminal formTHROUGH-HOLE
Terminal pitch2.54 mm
Terminal locationDUAL
width15.24 mm
M27C256B
256 Kbit (32Kb x 8) UV EPROM and OTP EPROM
s
5V ± 10% SUPPLY VOLTAGE in READ
OPERATION
ACCESS TIME: 45ns
LOW POWER CONSUMPTION:
– Active Current 30mA at 5MHz
– Standby Current 100µA
28
s
s
28
s
s
s
PROGRAMMING VOLTAGE: 12.75V ± 0.25V
PROGRAMMING TIME: 100µs/word
ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: 8Dh
1
1
FDIP28W (F)
PDIP28 (B)
DESCRIPTION
The M27C256B is a 256 Kbit EPROM offered in
the two ranges UV (ultra violet erase) and OTP
(one time programmable). It is ideally suited for mi-
croprocessor systems and is organized as 32,768
by 8 bits.
The FDIP28W (window ceramic frit-seal package)
has a transparent lid which allows the user to ex-
pose the chip to ultraviolet light to erase the bit pat-
tern. A new pattern can then be written to the
device by following the programming procedure.
For applications where the content is programmed
only one time and erasure is not required, the
M27C256B is offered in PDIP28, PLCC32 and
TSOP28 (8 x 13.4 mm) packages.
PLCC32 (C)
TSOP28 (N)
8 x 13.4 mm
Figure 1. Logic Diagram
VCC
VPP
15
A0-A14
8
Q0-Q7
E
G
M27C256B
VSS
AI00755B
August 2002
1/16
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