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參數(shù)資料
| 型號： | M48T35AYSH |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| 中文描述： | 256千位的32KB的SRAM x8計時器 |
| 文件頁數(shù)： | 13/19頁 |
| 文件大小： | 148K |
| 代理商： | M48T35AYSH |
13/19
M48T35AY, M48T35AV
Figure 11. Crystal Accuracy Across Temperature
AI02124
-80
-60
-100
-40
-20
0
20
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
F= -0.038
F
(T - T
0
)
2
±
10%
ppm
C
2
T
0
= 25
°
C
ppm
°
C
Figure 12. Supply Voltage Protection
AI02169
VCC
0.1
μ
F
DEVICE
VCC
VSS
POWER SUPPLY DECOUPLING and
UNDERSHOOT PROTECTION
I
CC
transients, including those produced by output
switching, can produce voltage fluctuations, re-
sulting in spikes on the V
CC
bus. These transients
can be reduced if capacitors are used to store en-
ergy, which stabilizes the V
CC
bus. The energy
stored in the bypass capacitors will be released as
low going spikes are generated or energy will be
absorbed when overshoots occur. A bypass ca-
pacitor value of 0.1μF (as shown in Figure 12) is
recommended in order to provide the needed fil-
tering.
In addition to transients that are caused by normal
SRAM operation, power cycling can generate neg-
ative voltage spikes on V
CC
that drive it to values
below V
SS
by as much as one Volt. These nega-
tive spikes can cause data corruption in the SRAM
while in battery backup mode. To protect from
these voltage spikes, it is recommended to con-
nect a schottky diode from V
CC
to V
SS
(cathode
connected to V
CC
, anode to V
SS
). Schottky diode
1N5817 is recommended for through hole and
MBRS120T3 is recommended for surface mount.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T35MH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35PC | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35SH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35Y-70MH1 | 功能描述:實時時鐘 Advanced Analog RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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