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M51951A,B/M51952A,B
Voltage Detecting, System Resetting IC Series
REJ03D0775-0400 Rev.4.00 Sep 18, 2007
Description
M51951A,B/M51952A,B are semiconductor integrated circuits designed for detecting supply voltage and resetting all types of logic circuits such as CPUs. They include a built-in delay circuit to provide a retardation time (200 s Typ). 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 k * 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
M51951AL/BL M51952AL/BL 5 Output 4 NC 3 GND 1 Supply voltage 2 NC 1 Supply voltage (Top view) Package: 5P5T (Top view) Package: PLZZ0004CB-A (SOT-89) M51951AML/BML M51952AML/BML 3 Output 2 GND M51951ASL/BSL M51952ASL/BSL
1. Supply voltage 2. GND 1 3. Output
2
3
(Top view) Package: PRSS0003DF-A (TO-92L)
REJ03D0775-0400 Rev.4.00 Sep 18, 2007 Page 1 of 7
M51951A,B/M51952A,B
Block Diagram
M51951A, B Supply voltage A: Built-in Load B: Open Collector M51952A, B Supply voltage A: Built-in Load B: Open Collector
R1 - R2 + 1.25V -
25A Typ
R1 Output R2 - + 1.25V +
25A Typ
Output
C Delay capacitor
C Delay capacitor
GND
GND
Operating Waveform
M51951A, B
Supply voltage
M51952A, B
Supply voltage
4.25V 0.65V t H
td td
4.25V
t H
td td
Output state
L Output undefined
td 200s
Output state
L
td 200s
t
t
REJ03D0775-0400 Rev.4.00 Sep 18, 2007 Page 2 of 7
M51951A,B/M51952A,B
Absolute Maximum Ratings
(Ta = 25C, unless otherwise noted)
Item Supply voltage Output sink current Output voltage Power dissipation Symbol VCC Isink VO Pd Ratings 18 6 VCC 18 450 700 500 Thermal derating K 4.5 7 5 Operating temperature Storage temperature Topr Tstg -30 to +85 -40 to +125 C C mW/C mW Unit V mA V Type A (output with constant current load) Type B (open collector output) 5-pin SIP 3-pin SIP 3-pin SOP Ta 25C 5-pin SIP 3-pin SIP 3-pin SOP Conditions
Electrical Characteristics
(Ta = 25C, unless otherwise noted) * "L" reset type M51951A, M51951B * "H" reset type M51952A, M51952B
Item Detecting voltage Hysteresis voltage Detecting voltage temperature coefficient Circuit current Delay time Output saturation voltage Threshold operating voltage Output leakage current Output load current Output high voltage Symbol VS VS VS/T ICC tpd Vsat VOPL IOH IOC VOH Min 4.05 30 -- -- -- 80 -- -- -- -- -- -40 VCC-0.2 Typ 4.25 50 0.01 450 420 200 0.2 0.2 0.67 0.55 -- -25 VCC-0.06 Max 4.45 80 -- 680 630 500 0.4 0.4 0.8 0.7 30 -17 -- nA A V V s V L reset type, VCC = 4V, Isink = 4mA H reset type, VCC = 5V, Isink = 4mA L reset type minimum supply voltage for IC operation RL = 2.2k, Vsat 0.4V RL = 100k, Vsat 0.4V Unit V mV %/C A Test Conditions
Type A, VCC = 5V Type B, VCC = 5V
Type B Type A, VCC = 5V, VO = 1/2 x VCC Type A
REJ03D0775-0400 Rev.4.00 Sep 18, 2007 Page 3 of 7
M51951A,B/M51952A,B
Typical Characteristics
Thermal Derating (Maximum Rating) 1000
Power Dissipation Pd (mW) Detection Voltage VS (V)
Detection Voltage vs. Ambient Temperature (Supply voltage detection series) 4.34 4.32 4.30 4.28 4.26
VSL VSH
800 600 400 200 0 0
3-pin SIP 3-pin SOP 5-pin SIP
4.24 4.22 -40 -20
25
50
75
100
125
0
20
40
60
80 100
Ambient Temperature Ta (C) Delay Time vs. Ambient Temperature (M5195xx, Built-in capacitor type) 350
Output Voltage VOUT (V)
Ambient Temperature Ta (C) Threshold Operating Voltage ([L] reset type) 1.0 0.8 0.6
RL = 2.2k Ta = 25C
300
Delay Time tpd (s)
250
VCC = 5V
200 150 100 50 0 -40 -20 0 20 40 60
10V VCC = 15V
0.4 0.2 0 0
RL = 22k RL = 100k
80 100
0.2
0.4
0.6
0.8
1.0
Ambient Temperature Ta (C)
Supply Voltage VCC (V) Output Load Current vs. Output Voltage (M5195xA)
Output Load Current ICC (A)
Output Saturation Voltage Vsat (V)
Output Saturation Voltage vs. Output Sink Current 0.3
Supply voltage detecting "L" reset type : VCC = 4V Except above mentioned : VCC = 5V
-40
0.2
-30
VCC = 5V VCC = 10V VCC = 15V
-20
0.1
-10
0 0
1
2
3
4
5
6
0 0
4
8
12
16
Output Sink Current Isink (mA)
Output Voltage VO (V)
REJ03D0775-0400 Rev.4.00 Sep 18, 2007 Page 4 of 7
M51951A,B/M51952A,B
Circuit Current vs. Ambient Temperature (M51951B, M51952B) 700
Circuit Current ICC (A)
600 500 400 300 200 100 0 -40 -20 0 20 40 60 80 100
VCC = 5V
Ambient Temperature Ta (C)
Example of Application Circuit
Reset Circuit of M5195xx Series
VCC
Supply voltage M51951x M51952x GND Output
RL
Supply voltage RESET (RESET) Logic circuit GND
Figure 1 Reset Circuit of M5195xx Series Notes: 1. When the detecting supply voltage is 4.25 V, M51951, M51952, M51953 and M51954 are used. When the voltage is anything except 4.25 V, M51955, M51956, M51957 and M51958 are used. 2. When the delay time is short, M51951, M51952, M51955 and M51956 are available. These ICs have a delay capacity and the delay time is about 200 s. If a longer delay time is necessary, M51953, M51954, M51957 and M51958 are used. 3. If the M5195xx and the logic circuit share a common power source, type A (built-in load type) can be used whether a pull-up resistor is included in the logic circuit or not. 4. The logic circuit preferably should not have a pull-down resistor, but if one is present, add load resistor RL to overcome the pull-down resistor. 5. When the reset terminal in the logic circuit is of the low reset type, M51951, M51953, M51955 and M51957 are used and when the terminal is of the high reset type, M51952, M51954, M51956 and M51958 are used. 6. When a negative supply voltage is used, the supply voltage side of M5195xx and the GND side are connected to negative supply voltage respectively.
REJ03D0775-0400 Rev.4.00 Sep 18, 2007 Page 5 of 7
M51951A,B/M51952A,B
Package Dimensions
5P5T
EIAJ Package Code SIP5-P-240-2.54 JEDEC Code - Weight(g) 0.22 Lead Material Cu Alloy
Plastic 5pin 240mil SIP
D
E
A2 A1 L A
Symbol
1
b e b1
5
E1 b2 c
SEATING PLANE
A A1 A2 b b1 b2 c D E E1 e L
Dimension in Millimeters Min Nom Max - - 6.1 - - 1.4 - - 4.0 0.4 0.5 0.6 1.1 1.2 1.5 0.75 0.85 1.15 0.22 0.27 0.34 11.7 11.9 11.5 1.77 1.97 2.17 0.6 0.7 0.8 - - 2.54 - - 3.0
Package Name SOT-89
JEITA Package Code SC-62
RENESAS Code PLZZ0004CB-A
Previous Code
MASS[Typ.] 0.48g
Unit: mm
4.6Max 1.6 0.2 1.5 0.1
2.5 0.1 0.8Min
0.58Max 3.0 0.48Max
4.2Max
1.5
0.4 -0.05
+0.03
REJ03D0775-0400 Rev.4.00 Sep 18, 2007 Page 6 of 7
M51951A,B/M51952A,B
JEITA Package Code RENESAS Code PRSS0003DF-A Package Name TO-92L MASS[Typ.] 0.34g
Unit: mm
5.1 Max
8.2 Max
0.8
9.5 Min
0.5
1.27 4.1
1.27
4.1 Max
REJ03D0775-0400 Rev.4.00 Sep 18, 2007 Page 7 of 7
0.5
1.35
2.2 Max
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