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STM802 датащи(PDF) 10 Page - STMicroelectronics

номер детали STM802
подробное описание детали  3 V supervisor with battery switchover
PDF  42 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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STM802 датащи(HTML) 10 Page - STMicroelectronics

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Description
STM690, STM704, STM795, STM802, STM804, STM805, STM806
10/42
Doc ID 10519 Rev 9
1.1.9
E (chip enable input)
The input to the chip enable gating circuit. Connect to ground if unused.
1.1.10
ECON (conditional chip enable)
ECON goes low only when E is low and reset is not asserted. If ECON is low when reset is
asserted, ECON will remain low for 15 µs or until E goes high, whichever occurs first. In the
disabled mode, ECON is pulled up to VOUT.
1.1.11
VBAT (backup battery input)
When VCC falls below VSO, VOUT switches from VCC to VBAT. When VCC rises above VSO +
hysteresis, VOUT reconnects to VCC. VBAT may exceed VCC. Connect to VCC if no battery is
used.
Table 3.
Pin description
Pin
Name
Function
STM795
STM690
STM802
STM704
STM806
STM804
STM805
—
—
6
—
MR
Push-button reset input
—
6
—
6
WDI
Watchdog input
7
7
7
—
RST
Active-low reset output
—
—
—
7
RST
Active-high reset output
—
4
4
4
PFI
Power-fail input
—
5
5
5
PFO
Power-fail output (push-pull)
1
1
1
1
VOUT
Supply output for external LPSRAM
2
2
2
2
VCC
Supply voltage
3
—
—
—
Vccsw
VCC switch output (push-pull)
4
3
3
3
VSS
Ground
5
—
—
—
E
Chip enable input
6
—
—
—
ECON
Conditioned chip enable output
8
8
8
8
VBAT
Backup battery input



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