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參數(shù)資料
| 型號(hào)： | M41T256YMT7F |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 256 Kbit 32K x8 SERIAL RTC |
| 中文描述： | 256千位32K的x8串行實(shí)時(shí)時(shí)鐘 |
| 文件頁(yè)數(shù)： | 21/27頁(yè) |
| 文件大小： | 185K |
| 代理商： | M41T256YMT7F |
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M41T256Y
Figure 17. Power Down/Up Mode AC Waveforms
Table 10. Power Down/Up AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
A
= –25 to 70°C; V
CC
= 4.5 to 5.5V (except where noted).
2. V
PFD
(max) to V
PFD
(min) fall time of less than tF may result in deselection/write protection not occurring until 200μs after V
CC
pass-
es V
PFD
(min).
3. V
PFD
(min) to V
SS
fall time of less than t
FB
may cause corruption of RAM data.
4. At 25°C and V
CC
= 0V, using a BR2330 Li Battery. This drops to 7.2 years when using the M4T32-BR12SH with the oscillator run-
ning.
Symbol
Parameter
(1)
Min
Typ
Max
Unit
t
F(2)
V
PFD
(max) to V
PFD
(min) V
CC
Fall Time
300
μs
t
FB(3)
V
PFD
(min) to V
SS
V
CC
Fall Time
10
μs
t
R
V
PFD
(min) to V
PFD
(max) V
CC
Rise Time
10
μs
t
RB
V
SS
to V
PFD
(min) V
CC
Rise Time
1
μs
t
REC
Power up Deselect Time
40
200
ms
t
DR
Expected Data Retention Time (OSC On, Sleep Mode
Off)
15
(4)
YEARS
AI04757
VCC
VPFD (max)
INPUTS
(PER CONTROL INPUT)
OUTPUTS
DON'T CARE
HIGH-Z
tF
tFB
tR
tRB
tDR
VALID
VALID
(PER CONTROL INPUT)
RECOGNIZED
RECOGNIZED
VPFD (min)
VSO
tREC
RST
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