LM3712XW1BP308 NSC [National Semiconductor], LM3712XW1BP308 Datasheet - Page 2

• Manufacturer Part Number: LM3712XW1BP308
• Description: Microprocessor Supervisory Circuits with Separate Watchdog Timer Output, Power Fail Input and Manual Reset
• Manufacturer: NSC [National Semiconductor]

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Bump No.
Connection Diagram
Pin Description
A1
B1
C1
C2
C3
B3
A3
A2
B2
RESET
RESET
Name
WDO
GND
PFO
WDI
V
MR
PFI
NC
CC
Manual-Reset input. When MR is less than V
RESET/RESET is engaged.
Power Supply input.
Reset Logic Output. Pulses low for t
low whenever V
for t
V
Reset Logic Output. RESET is the inverse of RESET (LM3713 only).
Power-Fail Logic Output. When PFI is below V
high.
Watchdog Output. If no digital activity is detected on WDI (Watchdog Input) for a period
exceeding t
Ground reference for all signals.
Watchdog Input Transition Monitor: If no transition activity occurs for a period exceeding
t
Power-Fail Comparator Input. When PFI is less than V
the PFO goes low; otherwise, PFO remains high.
No Connect. Test input used at factory only. Leave floating.
WD
MRT
RP
(Watchdog Timeout Period), reset is engaged.
(LM3712 only).
after either V
(looking from the coating side)
micro SMD 9 Bump Package
WD
, this output pulls low.
CC
is below the reset threshold or when MR is below V
CC
Top View
BPA09
rises above the reset threshold, or after MR input rises above
2
RP
20011901
(Reset Timeout Period) when triggered, and stays
Function
MRT
PFT
(Manual Reset Threshold)
PFO goes low; otherwise, PFO remains
PFT
(Power-Fail Reset Threshold),
MRT
. It remains low