M87C257-60XF1X datasheet, PDF - EEWORLD Datasheet

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M87C257-60XF1X: Description32K X 8 UVPROM, 90 ns, CDIP28; Categorystorage storage; File Size96KB，13 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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M87C257-60XF1X Overview

32K X 8 UVPROM, 90 ns, CDIP28

M87C257-60XF1X Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	STMicroelectronics
Parts packaging code	DIP
package instruction	WINDOWED, FRIT SEALED, CERAMIC, DIP-28
Contacts	28
Reach Compliance Code	compli
ECCN code	EAR99
Maximum access time	60 ns
I/O type	COMMON
JESD-30 code	R-GDIP-T28
JESD-609 code	e3
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	70 °C
Minimum operating temperature
organize	32KX8
Output characteristics	3-STATE
Package body material	CERAMIC, GLASS-SEALED
encapsulated code	WDIP
Encapsulate equivalent code	DIP28,.6
Package shape	RECTANGULAR
Package form	IN-LINE, WINDOW
Parallel/Serial	PARALLEL
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	5 V
Certification status	Not Qualified
Maximum seat height	5.71 mm
Maximum standby current	0.0001 A
Maximum slew rate	0.03 mA
Maximum supply voltage (Vsup)	5.25 V
Minimum supply voltage (Vsup)	4.75 V
Nominal supply voltage (Vsup)	5 V
surface mount	NO
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	Matte Tin (Sn)
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	15.24 mm

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M87C257

ADDRESS LATCHED

256K (32K x 8) UV EPROM and OTP EPROM

INTEGRATED ADDRESS LATCH

FAST ACCESS TIME: 45ns

LOW POWER “CMOS” CONSUMPTION:

– Active Current 30mA

– Standby Current 100µA

PROGRAMMING VOLTAGE: 12.75V

ELECTRONIC SIGNATURE for AUTOMATED

PROGRAMMING

PROGRAMMING TIMES of AROUND 3sec.

(PRESTO II ALGORITHM)

FDIP28W (F)

PLCC32 (C)

Figure 1. Logic Diagram

DESCRIPTION

The M87C257 is a high speed 262,144 bit UV

erasable and electrically programmable EPROM.

The M87C257 incorporates latches for all address

inputs to minimize chip count, reduce cost, and

simplify the design of multiplexed bus systems.

The Window Ceramic Frit-Seal Dual-in-Line pack-

age has a transparent lid which allows the user to

expose the chip to ultraviolet light to erase the bit

pattern. 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

M87C257 is offered in Plastic Leaded Chip Carrier,

package.

VCC

A0-A14

Q0-Q7

M87C257

Table 1. Signal Names

A0 - A14

Q0 - Q7

ASV

Address Inputs

Data Outputs

Chip Enable

Output Enable

Address Strobe / Program Supply

Supply Voltage

Ground

ASVPP

VSS

AI00928B

June 1996

1/13

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