M27C400 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M27C400

4 Mbit (512Kb x8 or 256Kb x16) UV EPROM and OTP EPROM

STMicroelectronics 

Table 10. Programming Mode AC Characteristics (1)

(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.5V ± 0.25V)

Symbol

Alt

Parameter

Test Condition

Min

tAVEL

tAS Address Valid to Chip Enable Low

2

tQVEL

tDS Input Valid to Chip Enable Low

2

tVPHAV

tVPS VPP High to Address Valid

2

tVCHAV

tVCS VCC High to Address Valid

2

tELEH

tPW Chip Enable Program Pulse Width

45

tEHQX

tDH Chip Enable High to Input Transition

2

tQXGL

tOES Input Transition to Output Enable Low

2

tGLQV

tOE Output Enable Low to Output Valid

tGHQZ (2)

tDFP Output Enable High to Output Hi-Z

0

tGHAX

tAH

Output Enable High to Address

Transition

0

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

2. Sampled only, not 100% tested.

Figure 8. Programming and Verify Modes AC Waveforms

M27C400

Max Unit

µs

µs

µs

µs

55

µs

µs

µs

120

ns

130

ns

ns

A0-A17

Q0-Q15

BYTEVPP

VCC

E

G

tAVEL

DATA IN

tQVEL

VALID

tEHQX

DATA OUT

tVPHAV

tGLQV

tVCHAV

tELEH

tQXGL

tGHQZ

tGHAX

PROGRAM

VERIFY

AI01639

9/14

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