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M28C256-25BS1T Datasheet(PDF) 11 Page - STMicroelectronics

Part # M28C256-25BS1T
Description  256 Kbit (32Kb x8) Parallel EEPROM with Software Data Protection
Download  21 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M28C256-25BS1T Datasheet(HTML) 11 Page - STMicroelectronics

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background image
Symbol
Alt
Parameter
Test Condition
M28256-W
Unit
Min
Max
tAVWL
tAS
Address Valid to Write Enable Low
E = VIL,G = VIH
0ns
tAVEL
tAS
Address Valid to Chip Enable Low
G = VIH,W= VIL
0ns
tELWL
tCES
Chip Enable Low to Write Enable Low
G = VIH
0ns
tGHWL
tOES
Output Enable High to Write Enable
Low
E= VIL
0ns
tGHEL
tOES
Output Enable High to Chip Enable Low
W = VIL
0ns
tWLEL
tWES
Write Enable Low to Chip Enable Low
G = VIH
0ns
tWLAX
tAH
Write Enable Low to Address Transition
70
ns
tELAX
tAH
Chip Enable Low to Address Transition
70
ns
tWLDV
tDV
Write Enable Low to Input Valid
E = VIL,G = VIH
1
µs
tELDV
tDV
Chip Enable Low to Input Valid
G = VIH,W= VIL
1
µs
tELEH
tWP
Chip Enable Low to Chip Enable High
100
ns
tWHEH
tCEH
Write Enable High to Chip Enable High
0
ns
tWHGL
tOEH
Write Enable High to Output Enable
Low
0ns
tEHGL
tOEH
Chip Enable High to Output Enable Low
0
ns
tEHWH
tWEH
Chip Enable High to Write Enable High
0
ns
tWHDX
tDH
Write Enable High to Input Transition
0
ns
tEHDX
tDH
Chip Enable High to Input Transition
0
ns
tWHWL
tWPH
Write Enable High to Write Enable Low
100
ns
tWLWH
tWP
Write Enable Low to Write Enable High
100
ns
tWHWH
tBLC
Byte Load Repeat Cycle Time
0.2
150
µs
tWHRH
tWC
Write Cycle Time
5
ms
tEL,tWL
E or W Input Filter Pulse Width
Note 1
10
ns
tDVWH
tDS
Data Valid before Write Enable High
50
ns
tDVEH
tDS
Data Valid before Chip Enable High
50
ns
Note: 1. Characterized only but not tested in production.
Table 13. Write Mode AC Characteristics
(TA = 0 to 70
°C or –40 to 85°C; VCC = 2.7V to 3.6V)
11/21
M28256


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