M27C4001-10B1X datasheet(7/17 Pages) STMICROELECTRONICS

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M27C4001

Table 9. Programming Mode DC Characteristics (1)

(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)

Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.

Table 10. Programming Mode AC Characteristics (1)

(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)

Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.

2. Sampled only, not 100% tested.

Symbol

Parameter

Test Condition

Min

Max

Unit

ILI

Input Leakage Current

≤ VIN ≤ VCC

±10

µA

ICC

Supply Current

IPP

Program Current

E = VIL

VIL

Input Low Voltage

–0.3

0.8

VIH

Input High Voltage

VCC + 0.5

VOL

Output Low Voltage

IOL = 2.1mA

0.4

VOH

Output High Voltage TTL

IOH = –400µA

2.4

VID

A9 Voltage

11.5

12.5

Symbol

Alt

Parameter

Test Condition

Min

Max

Unit

tAVEL

tAS

Address Valid to Chip Enable Low

µs

tQVEL

tDS

Input Valid to Chip Enable Low

µs

tVPHEL

tVPS

VPP High to Chip Enable Low

µs

tVCHEL

tVCS

VCC High to Chip Enable Low

µs

tELEH

tPW

Chip Enable Program Pulse Width

105

µs

tEHQX

tDH

Chip Enable High to Input

Transition

µs

tQXGL

tOES

Input Transition to Output Enable

Low

µs

tGLQV

tOE

Output Enable Low to Output Valid

100

tGHQZ

tDFP

Output Enable High to Output Hi-Z

130

tGHAX

tAH

Output Enable High to Address

Transition

0ns

Programming

When delivered (and after each erasure for UV

EPROM), all bits of the M27C4001 are in the ’1’

state. Data is introduced by selectively program-

ming ’0’s into the desired bit locations. Although

only ’0’s will be programmed, both ’1’s and ’0’s can

be present in the data word. The only way to

change a ’0’ to a ’1’ is by die exposure to ultraviolet

light (UV EPROM). The M27C4001 is in the pro-

gramming mode when VPP input is at 12.75V, G is

at VIH and E is pulsed to VIL. The data to be pro-

grammed is applied to 8 bits in parallel to the data

output pins. The levels required for the address

and data inputs are TTL. VCC is specified to be

6.25V ± 0.25V.

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