M51945A,B/M51946A,B
Voltage Detecting, System Resetting IC Series
REJ03D0774-0300
Rev.3.00
Sep 18, 2007
Description
M51945A,B/M51946A,B are semiconductor integrated circuits for resetting of all types of logic circuits such as CPUs,
and has the feature of setting the detection voltage by adding external resistance.
They fined extensive applications, including battery checking circuit, level detecting circuit and waveform shaping
circuit.
Features
• Few external parts
• Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage):
0.6 V (Typ) at RL = 22 kΩ
• Wide supply voltage range: 2 V to 17 V
• Wide application range
Application
• Reset circuit of Pch, Nch, CMOS, microcomputer, CPU and MCU, Reset of logic circuit, Battery check circuit,
switching circuit back-up voltage, level detecting circuit, waveform shaping circuit, delay waveform generating
circuit, DC/DC converter, over voltage protection circuit
Recommended Operating Condition
• Supply voltage range: 2 V to 17 V
Pin Arrangement
M51945AL/BL
M51946AL/BL
5 Output
4 NC
M51945AFP/BFP
M51946AFP/BFP
NC 1
8 NC
Input 2
7 Power-supply
3 GND
NC 3
6 Output
2 Input
1 Power-supply
GND 4
(Top view)
(Top view)
Outline: 5P5T
5 NC
NC: No Connection
Outline: PRSP0008DE-C (recommend)
PRSP0008DA-A (8P2S-A) (not recommend for new design)
REJ03D0774-0300 Rev.3.00 Sep 18, 2007
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