M27C256B-2B6TR 查看數據表（PDF） - STMicroelectronics

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M27C256B-2B6TR

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

STMicroelectronics 

DC and AC parameters

M27C256B

Figure 8. Programming and Verify modes AC waveforms

A0-A14

Q0-Q7

VPP

VCC

E

G

tAVEL

DATA IN

tQVEL

tVPHEL

tVCHEL

tELEH

VALID

tEHQX

DATA OUT

tGLQV

tQXGL

tGHQZ

tGHAX

PROGRAM

VERIFY

AI00759

Table 11. Programming mode AC characteristics(1) (2)

Symbol Alt

Parameter

Test

Condition

Min

Max Unit

tAVEL tAS Address Valid to Chip Enable Low

2

µs

tQVEL tDS Input Valid to Chip Enable Low

2

µs

tVPHEL tVPS VPP High to Chip Enable Low

2

µs

tVCHEL tVCS VCC High to Chip Enable Low

2

µs

tELEH tPW Chip Enable Program Pulse Width

95 105 µs

tEHQX tDH Chip Enable High to Input Transition

2

µs

tQXGL tOES Input Transition to Output Enable Low

2

µs

tGLQV tOE Output Enable Low to Output Valid

100 ns

tGHQZ tDFP Output Enable High to Output Hi-Z

0

130 ns

tGHAX tAH Output Enable High to Address Transition

0

ns

1. TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V.

2. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.

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