AT17C65A 查看數據表（PDF） - Atmel Corporation
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AT17C65A Datasheet PDF : 15 Pages
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AC Characteristics for AT17C65A/128A
VCC = 5V ± 5% Commercial; VCC = 5V ± 10% Industrial/Military
Commercial
Industrial/Military(1)
Symbol Description
Min
Max
Min
Max
TOE(2)
TCE(2)
TCAC(2)
OE to Data Delay
nCS to Data Delay
DCLK to Data Delay
30
35
50
50
50
55
TOH
TDF(3)
Data Hold From nCS, OE, or DCLK
nCS or OE to Data Float Delay
0
0
50
50
TLC
DCLK Low Time
30
35
THC
DCLK High Time
30
35
TSCE
nCS Setup Time to DCLK (to guarantee proper counting)
45
50
THCE
nCS Hold Time from DCLK (to guarantee proper counting)
0
0
THOE
OE Low Time (guarantees counter is reset)
25
25
FMAX
Notes:
Maximum Input Clock Frequency
12.5
12.5
1. Preliminary specifications for military operating range only.
2. AC test load = 50 pF.
3. Float delays are measured with 5 pF AC loads. Transition is measured ± 200 mV from steady-state active levels.
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
AC Characteristics for AT17C128A when Cascading
VCC = 5V ± 5% Commercial; VCC = 5V ± 10% Industrial/Military
Commercial
Industrial/Military(1)
Symbol Description
Min
Max
Min
Max
TCDF(3)
TOCK(2)
TOCE(2)
TOE(2)
DCLK to Data Float Delay
DCLK to nCASC Delay
nCS to nCASC Delay
OE to nCASC Delay
50
50
55
60
55
60
40
45
FMAX
Notes:
Maximum Input Clock Frequency
8
8
1. Preliminary specifications for military operating range only.
2. AC test load = 50 pF.
3. Float delays are measured with 5 pF AC loads. Transition is measured ± 200 mV from steady-state active levels.
Units
ns
ns
ns
ns
MHz
10 AT17C/LV65A/128A/256A
0996D–08/01
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