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参数资料
| 型号： | M48T512Y-85PM1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDIP32 |
| 封装： | ROHS COMPLIANT, PLASTIC, DIP-32 |
| 文件页数： | 6/23页 |
| 文件大小： | 370K |
| 代理商： | M48T512Y-85PM1 |
Clock operations
M48T512Y, M48T512V
Doc ID 5747 Rev 6
3.5
VCC noise and negative going transients
ICC transients, including those produced by output switching, can produce voltage
fluctuations, resulting in spikes on the VCC bus. A ceramic bypass capacitor value of 0.1 F
is recommended to filter these spikes.
In addition to transients that are caused by normal SRAM operation, power cycling can
generate negative voltage spikes on VCC that drive it to values below VSS 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 connecting a schottky
diode from VCC to VSS (cathode connected to VCC, anode to VSS). (Schottky diode 1N5817
is recommended for through hole and MBRS120T3 is recommended for surface mount).
Figure 9.
Supply voltage protection
Caution:
Negative undershoots below –0.3 V are not allowed on any pin while in the battery backup
mode.
AI02169
VCC
0.1F
DEVICE
VCC
VSS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T512YPM | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513V | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513V-70CS1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513V-70PM1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513V-85CS1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
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