參數(shù)資料
型號(hào)： M48T58-70PC1
廠商： STMICROELECTRONICS
元件分類(lèi)： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 0 TIMER(S), REAL TIME CLOCK, PDIP28
封裝： 0.600 INCH, CAPHAT, PLASTIC, DIP-28
文件頁(yè)數(shù)： 13/33頁(yè)
文件大?。?/td> 511K
代理商： M48T58-70PC1
Clock operations
M48T58, M48T58Y
Doc ID 2412 Rev 7
6.7
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. These transients can be reduced if
capacitors are used to store energy which stabilizes the VCC 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 capacitor value of 0.1 F (as shown in
Figure 10) is recommended in order to provide the needed filtering.
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, it is recommended to connect 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 10.
Supply voltage protection
AI02169
VCC
0.1F
DEVICE
VCC
VSS
相關(guān)PDF資料
PDF描述
M48T58Y-70MH1E 0 TIMER(S), REAL TIME CLOCK, PDSO28
M48T58Y-70PC1TR 0 TIMER(S), REAL TIME CLOCK, PDIP28
M48T59V-70MH1E 0 TIMER(S), REAL TIME CLOCK, PDSO28
M48T59V-70PC1 0 TIMER(S), REAL TIME CLOCK, PDIP28
M48T59Y-70PC1DS 0 TIMER(S), REAL TIME CLOCK, PDIP28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M48T58-70PC1E 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM
M48T58-70PC1EE 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM
M48T58-70PC1F 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM
M48T58-70PC1FE 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM
M48T58-70PC1TR 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM
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