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M27W402-150K6TR Datenblatt(PDF) 7 Page - STMicroelectronics

Teilenummer M27W402-150K6TR
Bauteilbeschribung  4 Mbit 256Kb x16 Low Voltage UV EPROM and OTP EPROM
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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M27W402
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
0V
≤ VIN ≤ VCC
±10
µA
ICC
Supply Current
50
mA
IPP
Program Current
E= VIL
50
mA
VIL
Input Low Voltage
–0.3
0.8
V
VIH
Input High Voltage
2
VCC + 0.5
V
VOL
Output Low Voltage
IOL = 2.1mA
0.4
V
VOH
Output High Voltage TTL
IOH = –400µA
2.4
V
VID
A9 Voltage
11.5
12.5
V
Symbol
Alt
Parameter
Test Condi tion
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
0ns
Programming
The M27W402 has been designed to be fully com-
patible with the M27C4002 and has the same elec-
tronic signature. As a result the M27W402 can be
programmed as the M27C4002 on the same pro-
gramming equipment applying 12.75V on VPP and
6.25V on VCC by the use of the same PRESTO II
algorithm. When delivered (and after each ‘1’s era-
sure for UV EPROM), all bits of the M27W402 are
in the ’1’ state. Data is introduced by selectively
programming ’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 only way
to change a ‘0’ to a ‘1’ by die exposure to ultraviolet
light (UV EPROM). The M27W402 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 16 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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