M27C256B-20F7X datasheet, PDF - EEWORLD Datasheet

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M27C256B-20F7X: Description32K X 8 UVPROM, 90 ns, CDIP28; Categorystorage storage; File Size113KB，16 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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M27C256B-20F7X Overview

32K X 8 UVPROM, 90 ns, CDIP28

M27C256B-20F7X Parametric

Parameter Name	Attribute value
Parts packaging code	DIP
package instruction	WDIP,
Contacts	28
Reach Compliance Code	unknow
ECCN code	EAR99
Maximum access time	150 ns
JESD-30 code	R-GDIP-T28
memory density	262144 bi
Memory IC Type	UVPROM
memory width	8
Number of functions	1
Number of terminals	28
word count	32768 words
character code	32000
Operating mode	ASYNCHRONOUS
Maximum operating temperature	105 °C
Minimum operating temperature	-40 °C
organize	32KX8
Package body material	CERAMIC, GLASS-SEALED
encapsulated code	WDIP
Package shape	RECTANGULAR
Package form	IN-LINE, WINDOW
Parallel/Serial	PARALLEL
Certification status	Not Qualified
Maximum seat height	5.71 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	4.5 V
Nominal supply voltage (Vsup)	5 V
surface mount	NO
technology	CMOS
Temperature level	INDUSTRIAL
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
width	15.24 mm
Base Number Matches	1

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M27C256B

256 Kbit (32Kb x 8) UV EPROM and OTP EPROM

5V ± 10% SUPPLY VOLTAGE in READ

OPERATION

ACCESS TIME: 45ns

LOW POWER CONSUMPTION:

– Active Current 30mA at 5MHz

– Standby Current 100µA

PROGRAMMING VOLTAGE: 12.75V ± 0.25V

PROGRAMMING TIME: 100µs/word

ELECTRONIC SIGNATURE

– Manufacturer Code: 20h

– Device Code: 8Dh

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

A0-A14

Q0-Q7

M27C256B

VSS

AI00755B

August 2002

1/16

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Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

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