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M45PE40 Datasheet(PDF) 27 Page - STMicroelectronics

Part No. M45PE40
Description  4 Mbit, Low Voltage, Page-Erasable Serial Flash Memory With Byte-Alterability and a 33 MHz SPI Bus Interface
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M45PE40 Datasheet(HTML) 27 Page - STMicroelectronics

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M45PE40
Table 12. AC Characteristics (25MHz operation)
Note: 1. tCH + tCL must be greater than or equal to 1/ fC(max)
2. Value guaranteed by characterization, not 100% tested in production.
3. When using PP and PW instructions to update consecutive Bytes, optimized timings are obtained with one sequence including all
the Bytes versus several sequences of only a few Bytes. (1
≤n ≤256)
Test conditions specified in Table 8. and Table 9.
Symbol
Alt.
Parameter
Min.
Typ.
Max.
Unit
fC
fC
Clock Frequency for the following
instructions: FAST_READ, PW, PP,
PE, SE, DP, RDP, WREN, WRDI,
RDSR
D.C.
25
MHz
fR
Clock Frequency for READ
instructions
D.C.
20
MHz
tCH
1
tCLH
Clock High Time
18
ns
tCL
1
tCLL
Clock Low Time
18
ns
Clock Slew Rate 2 (peak to peak)
0.03
V/ns
tSLCH
tCSS
S Active Setup Time (relative to C)
10
ns
tCHSL
S Not Active Hold Time (relative to C)
10
ns
tDVCH
tDSU
Data In Setup Time
5
ns
tCHDX
tDH
Data In Hold Time
5
ns
tCHSH
S Active Hold Time (relative to C)
10
ns
tSHCH
S Not Active Setup Time (relative to C)
10
ns
tSHSL
tCSH
S Deselect Time
200
ns
tSHQZ
2
tDIS
Output Disable Time
15
ns
tCLQV
tV
Clock Low to Output Valid
15
ns
tCLQX
tHO
Output Hold Time
0
ns
tRLRH
2
tRST
Reset Pulse Width
10
µs
tRHSL
tREC
Reset Recovery Time
3
µs
tSHRH
Chip should have been deselected
before Reset is de-asserted
10
ns
tWHSL
Write Protect Setup Time
50
ns
tSHWL
Write Protect Hold Time
100
ns
tDP
2
S to Deep Power-down
3
µs
tRDP
2
S High to Standby Power mode
30
µs
tPW
(3)
Page Write Cycle Time (256 Bytes)
11
25
ms
Page Write Cycle Time (n Bytes)
10.2+
n*0.8/256
tPP
(3)
Page Program Cycle Time (256 Bytes)
1.2
5ms
Page Program Cycle Time (n Bytes)
0.4+
n*0.8/256
tPE
Page Erase Cycle Time
10
20
ms
tSE
Sector Erase Cycle Time
1
5
s


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