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參數(shù)資料
| 型號(hào)： | M48T512V-70PM1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | REAL TIME CLOCK, PDIP32 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-32 |
| 文件頁數(shù)： | 6/23頁 |
| 文件大?。?/td> | 370K |
| 代理商： | M48T512V-70PM1 |
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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| M48T513Y-70PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP36 |
| M48T513V-85PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP36 |
| M62320GP | 8 I/O, PIA-GENERAL PURPOSE, PDSO16 |
| M62320P | 8 I/O, PIA-GENERAL PURPOSE, PDIP16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T512V-85PM1 | 功能描述:實(shí)時(shí)時(shí)鐘 4 MBIT 512 Kbitx8 TIMEKEEPER 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| M48T512VPM | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T512Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T512Y_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3 V, 4 Mbit (512 Kbit x 8) TIMEKEEPER? SRAM |
| M48T512Y-70PM1 | 功能描述:實(shí)時(shí)時(shí)鐘 4M (512Kx8) 70ns 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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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