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L4901 Folha de dados(PDF) 6 Page - STMicroelectronics

Nome de Peças L4901
Descrição Electrónicos  DUAL 5V REGULATOR WITH RESET
PDF  10 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4901 Folha de dados(HTML) 6 Page - STMicroelectronics

Back Button L4901 Datasheet HTML 2Page - STMicroelectronics L4901 Datasheet HTML 3Page - STMicroelectronics L4901 Datasheet HTML 4Page - STMicroelectronics L4901 Datasheet HTML 5Page - STMicroelectronics L4901 Datasheet HTML 6Page - STMicroelectronics L4901 Datasheet HTML 7Page - STMicroelectronics L4901 Datasheet HTML 8Page - STMicroelectronics L4901 Datasheet HTML 9Page - STMicroelectronics L4901 Datasheet HTML 10Page - STMicroelectronics  
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Figure 4 shows the L4901A with a back up battery
on the V01 output to maintain a CMOS time-of-day
clock and a stand by type N-MOS
µP. The reset
output makes sure that the RAM is forced into the
low consumption stand by state, so the access to
memory is inhibit and the back up battery voltage
cannot drop so low that memory contents are cor-
rupted.
In this case the main on-off switch disconnects both
regulators from the supply battery.
The L4901A is also ideal for microcomputer sys-
tems using battery backup CMOS static RAMs. As
shown in Figure 5 the reset output is used both to
Figure 4
Figure 5
L4901A
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