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參數(shù)資料
| 型號： | M48T513V-85CS1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| 中文描述： | 3.3 - 5V的4兆位的SRAM 512KB的x8計時器 |
| 文件頁數(shù)： | 16/23頁 |
| 文件大小： | 145K |
| 代理商： | M48T513V-85CS1 |
M48T513Y, M48T513V
16/23
Table 13. Reset AC Characteristics
(T
A
= 0 to 70
°
C, V
CC
= 3.0V to 3.6V or V
CC
= 4.5V to 5.5V)
Symbol
Note: 1. C
L
= 5pF (see Figure 5)
Parameter
Min
Max
Unit
t
R
RSTIN Low to RST Low
20
100
ms
t
RHRZ(1)
RSTIN High to RST Hi-Z
40
200
ms
Figure 14. RSTIN TimingWaveform
AI02585
tRHRZ
RSTIN
RST
tR
Hi-Z
Hi-Z
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 ceramic by-
pass capacitor value of 0.1
μ
F (see Figure 15) is
recommended in order to provide the needed fil-
tering. In addition to transients that are caused by
normal SRAM operation, powercycling can gener-
ate negative voltage spikes on V
CC
that drive it to
values below V
SS
by as much as one volt. These
negative spikes can cause data corruption in the
SRAM while in battery backup mode. To protect
from these voltage spikes, ST recommends con-
necting a schottky diode from V
CC
toV
SS
(cathode
connected to V
CC
, anode to V
SS
). (Schottky diode
1N5817 is recommended for through hole and
MBRS120T3 is recommended for surfacemount).
Figure 15. Supply Voltage Protection
AI02169
VCC
0.1
μ
F
DEVICE
VCC
VSS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T513V-85PM1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513VPM | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513VSH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513Y-70CS1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
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