M27W202-120F6TR Ver la hoja de datos (PDF) - STMicroelectronics
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M27W202-120F6TR Datasheet PDF : 15 Pages
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M27W202
Table 9. Programming Mode DC Characteristics (1)
(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
Symbol
Parameter
Test Condition
Min
Max
ILI
Input Leakage Current
0 ≤ VIN ≤ VIH
± 10
ICC
Supply Current
50
IPP
Program Current
E = VIL
50
VIL
Input Low Voltage
VIH
Input High Voltage
–0.3
2
0.8
VCC + 0.5
VOL
Output Low Voltage
VOH
Output High Voltage TTL
IOL = 2.1mA
IOH = –400µA
0.4
2.4
VID
A9 Voltage
11.5
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
12.5
Table 10. Programming Mode AC Characteristics (1)
(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
Symbol
Alt
Parameter
Min
tAVPL
tAS
Address Valid to Program Low
2
tQVPL
tDS
Input Valid to Program Low
2
tVPHPL
tVPS VPP High to Program Low
2
tVCHPL
tVCS VCC High to Program Low
2
tELPL
tCES Chip Enable Low to Program Low
2
tPLPH
tPW Program Pulse Width
95
tPHQX
tDH Program 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.
Max
105
100
130
Unit
µA
mA
mA
V
V
V
V
V
Unit
µs
µs
µs
µs
µs
µs
µs
µs
ns
ns
ns
Programming
When delivered, all bits of the M27W202 are in the
’1’ state. Data is introduced by selectively pro-
gramming ’0’s into the desired bit locations. Al-
though only ’0’s will be programmed, both ’1’s and
’0’s can be present in the data word. The
M27W202 is in the programming mode when VPP
input is at 12.75V, E is at VIL and P is pulsed to VIL.
The data to be programmed is applied to 16 bits in
parallel, to the data output pins. The levels re-
quired for the address and data inputs are TTL.
VCC is specified to be 6.25V ± 0.25V.
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