M27V400 Datasheet, PDF (9/14 Pages) STMicroelectronics – 4 Mbit 512Kb x8 or 256Kb x16 UV EPROM and OTP EPROM

Table 10. Programming Mode AC Characteristics ⁽¹⁾
(T_A = 25 °C; V_CC = 6.25V ± 0.25V; V_PP = 12.5V ± 0.25V)
Symbol
Alt
Parameter
Test Condition
Min
t_AVEL
t_AS Address Valid to Chip Enable Low
2
t_QVEL
t_DS Input Valid to Chip Enable Low
2
t_VPHAV
t_VPS V_PP High to Address Valid
2
t_VCHAV
t_VCS V_CC High to Address Valid
2
t_ELEH
t_PW Chip Enable Program Pulse Width
45
t_EHQX
t_DH Chip Enable High to Input Transition
2
t_QXGL
t_OES Input Transition to Output Enable Low
2
t_GLQV
t_OE Output Enable Low to Output Valid
t_GHQZ ⁽²⁾
t_DFP Output Enable High to Output Hi-Z
0
t_GHAX
t_AH
Output Enable High to Address
Transition
0
Note: 1. V_CC must be applied simultaneously with or before V_PP and removed simultaneously or after V_PP.
2. Sampled only, not 100% tested.
Figure 8. Programming and Verify Modes AC Waveforms
M27V400
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
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