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M51955A,B/M51956A,B
Voltage Detecting, System Resetting IC Series
REJ03D0777-0200 Rev.2.00 Aug 20, 2007
Description
M51955A,B/M51956A,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 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
M51955AL/BL M51956AL/BL 5 Output 4 NC 3 GND NC 3 2 Input 1 Power-supply (Top view) Outline: 5P5T GND 4 (Top view) NC: No Connection Outline: PRSP0008DE-C (recommend) PRSP0008DA-A (8P2S-A) (not recommend for new design) 5 NC GND 4 (Top view) NC: No Connection Outline: PRSP0008DA-A (8P2S-A) 5 NC 6 Output NC 3 6 Output NC 1 Input 2 M51955AFP/BFP M51956BFP 8 NC 7 Power-supply NC 1 Input 2 M51956AFP 8 NC 7 Power-supply
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 1 of 11
M51955A,B/M51956A,B
Block Diagram
M51955A, B Powersupply A: Built-in Load B: Open Collector Powersupply M51956A, B A: Built-in Load B: Open Collector
25A Typ Input - + 1.25V - C Delay capacitor
Output
25A Typ Input - + 1.25V + C Delay capacitor
Output
GND
GND
Operating Waveform
M51955A, B M51956A, B
Input voltage
1.25V
Input voltage
1.25V
t H
td td
t H
td td
Output state
L
td 200s
Output state
L
td 200s
t
t
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 2 of 11
M51955A,B/M51956A,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 18 450 400 300 Thermal derating K 4.5 4.4 3 Operating temperature Storage temperature Input voltage range Topr Tstg VIN -30 to +85 -40 to +125 -0.3 to VCC -0.3 to +7 C C V VCC 7 V VCC > 7 V mW/C Unit V mA V mW Conditions
Type A (output with constant current load) Type B (open collector output) 5-pin SIP 8-pin SOP (PRSP0008DE-C): recommend 8-pin SOP (PRSP0008DA-A): not recommend Refer to the thermal derating curve. 5-pin SIP 8-pin SOP (PRSP0008DE-C) : recommend 8-pin SOP (PRSP0008DA-A) : not recommend
Electrical Characteristics
(Ta = 25C, unless otherwise noted) * "L" reset type M51955A, M51955B * "H" reset type M51956A, M51956B
Item Detecting voltage Hysteresis voltage Detecting voltage temperature coefficient Supply voltage range Input current Circuit current Delay time Output saturation voltage Threshold operating voltage Output leakage current Output load current Output high voltage Symbol VS VS VS/T VCC IIN ICC tpd Vsat VOPL IOH IOC VOH Min 1.20 9 -- 2 -- -- -- 80 -- -- -- -- -- -40 VCC-0.2 Typ 1.25 15 0.01 -- 100 390 360 200 0.2 0.2 0.67 0.55 -- -25 VCC-0.06 Max 1.30 23 -- 17 500 590 540 500 0.4 0.4 0.8 0.7 1 -17 -- A A V V s V L reset type, VCC = 5V, VIN < 1.2V, Isink = 4mA H reset type, VCC = 5V, VIN > 1.35V, 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 V nA A VIN = 1.25V VCC = 5V Test Conditions
Type A, VCC = 5V Type B, VCC = 5V
Type B Type A, VCC = 5V, VO = 1/2 x VCC Type A
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 3 of 11
M51955A,B/M51956A,B
Typical Characteristics
Thermal Derating (Maximum Rating) 500
Power Dissipation Pd (mW) Detection Voltage VS (V)
5-pin SIP 8-pin SOP (PRSP0008DE-C) : recommend 8-pin SOP (PRSP0008DA-A) : not recommend
Detection Voltage vs. Ambient Temperature (Input voltage detection series) 1.28 1.27
VSH
400 300 200 100 0 0
1.26 1.25 1.24 1.23 1.22 -40 -20
VSL
25
50
75 85 100
125
0
20
40
60
80 100
Ambient Temperature Ta (C) Detection Voltage vs. Supply Voltage (Input voltage detection series) 1.28
Detection Voltage VS (V) Input Current IIN (nA)
Ambient Temperature Ta (C) Input Current vs. Supply Voltage (Input voltage detection series) 250 200 150
Ta = -30C VIN = 1.25V
1.27 1.26 1.25
VSL VSH
100
Ta = 25C
1.24 1.23 1.22 0
50 0 0
Ta = 85C
4
8
12
16
20
4
8
12
16
20
Supply Voltage VCC (V) Delay Time vs. Ambient Temperature (M5195xx, Built-in capacitor type) 350
Output Voltage VOUT (V)
Supply Voltage VCC (V) 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)
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 4 of 11
M51955A,B/M51956A,B
Output Load Current vs. Output Voltage (M5195xA)
Output Saturation Voltage Vsat (V)
Output Saturation Voltage vs. Output Sink Current 0.3
Output Load Current ICC (A)
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) Circuit Current vs. Supply Voltage (M51955B, M51956B) 800
Output Voltage VO (V)
Circuit Current ICC (A)
600
Ta = -30C
400
Ta = 25C Ta = 85C
200
0 0
4
8
12
16
Supply Voltage VCC (V)
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 5 of 11
M51955A,B/M51956A,B
Example of Application Circuit
Reset Circuit of M5195xx Series
VCC
R1 Input
Powersupply M51955x M51956x GND Output
RL
Powersupply RESET (RESET) Logic circuit GND
R2
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. In this case, R1 and R2 are not necessary. When the voltage is anything except 4.25 V, M51955, M51956, M51957 and M51958 are used. In this case, the detecting supply voltage is 1.25 x (R1 +R2)/R2 (V) approximately. The detecting supply voltage can be set between 2 V and 15 V. 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. In this case, the delay time is about 0.34 x Cd (pF) s. 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.
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 6 of 11
M51955A,B/M51956A,B
Notice for use
About the Power Supply Line 1. About bypass capacitor Because the ripple and the spike of the high frequency noise and the low frequency are superimposed to the power supply line, it is necessary to remove these. Therefore, please install C1 and C2 for the low frequency and for the high frequency between the power supply line and the GND line as shown in following figure 2.
VCC
+
C1
C2 R1 Input Vin R2 GND
Power-supply M51955 M51956 Output
Example of ripple noise measures
Figure 2 Example of Ripple Noise Measures 2. The sequence of voltage impression Please do not impress the voltages to the input terminals earlier than the power supply terminal. Moreover, please do not open the power supply terminal with the voltage impressed to the input terminal. (The setting of the bias of an internal circuit collapses, and a parasitic element might operate.) About the Input Terminal 1. Setting range of input voltage The following voltage is recommended to be input to the input terminal (pin 2). about 0.8 (V) < Vin < VCC - 0.3 (V) .... at VCC 7 V about 0.8 (V) < Vin < 6.7 (V) .............. at VCC > 7 V 2. About using input terminal Please do an enough verification to the transition characteristic etc. of the power supply when using independent power supply to input terminal (pin 2).
VCC Vin is decided to the VCC subordinating, and operates in the range about 0.8 (V) < Vin < VCC - 0.3 (V). Output
Power-supply Input Vin GND M51955 M51956
Figure 3 Recommended Example
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 7 of 11
M51955A,B/M51956A,B
Independent
VCC1
VCC2 Power-supply Independent Input Vin
VCC GND
VCC Power-supply M51955 M51956 Output
Input Vin GND
M51955 M51956
Output
GND
Example 1. Independent power supply system Please do enough verifying about transition characteristic of VCC1 and VCC2.
Example 2. Logic pulse input (not recommended)
Figure 4 3. Calculation of detecting voltage Detecting voltage Vs can be calculated by the following expression. However, the error margin is caused in the detecting voltage because input current Iin (standard 100 nA) exists if it sets too big resistance. Please set the constant to disregard this error margin. R1 + R 2 VS = 1.25 x + Iin x R1 R2 error margin
VCC
R1 Vin R2 Iin Input GND
Power-supply M51955 M51956 Output
Figure 5 Influence of Input Current 4. About the voltage input outside ratings Please do not input the voltage outside ratings to the input terminal. An internal protection diode becomes order bias, and a large current flows.
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 8 of 11
M51955A,B/M51956A,B Setting of Output Load Resistance (M51955B/M51956B) High level output voltage can be set without depending on the power-supply voltage because the output terminal is an open collector type. However, please guard the following notes. 1. Please set it in value (2 V to 17 V) within the range of the power-supply voltage recommendation. Moreover, please never impress the voltage of maximum ratings 18 V or more even momentarily either. 2. Please set output load resistance (pull-up resistance) RL so that the output current (output inflow current IL) at L level may become 4 mA or less. Moreover, please never exceed absolute maximum rating (6 mA).
VCC (2V to 17V) RL 6 IL 4mA
Figure 6 Output Load Resistance RL
Others 1. Notes when IC is handled are published in our reliability handbook, and please refer it. The reliability handbook can be downloaded from our homepage (following URL). http://www.renesas.com/fmwk.jsp?cnt=reliability_root.jsp&fp=/products/common_info/reliability 2. Additionally, please inquire of our company when there is an uncertain point on use.
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 9 of 11
M51955A,B/M51956A,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
JEITA Package Code P-SOP8-4.4x4.85-1.27
RENESAS Code PRSP0008DE-C
Previous Code --
MASS[Typ.] 0.1g
*1
D
F
8
5
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET.
bp
HE E
*2
Index mark
Terminal cross section ( Ni/Pd/Au plating )
1 Z e 4
*3
c
Reference Symbol
Dimension in Millimeters
bp
x
M L1
A1
L
y
Detail F
D E A2 A1 A bp b1 c c1 HE e x y Z L L1
A
A2
Min Nom Max 4.65 4.85 5.05 4.2 4.4 4.6 1.85 0.00 0.1 0.20 2.03 0.34 0.4 0.46 0.15 0.20 0.25 0 8 5.7 6.2 6.5 1.12 1.27 1.42 0.12 0.10 0.75 0.25 0.45 0.65 0.90
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 10 of 11
M51955A,B/M51956A,B
JEITA Package Code P-SOP8-4.4x5-1.27 RENESAS Code PRSP0008DA-A Previous Code 8P2S-A MASS[Typ.] 0.07g
8
5
HE
*1
E
F
1
Index mark
4
NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET.
c
A2 A1
*2
D
Reference Symbol
Dimension in Millimeters
*3 e y
bp
D E A2 A1 A bp c HE e y L
Detail F
Min Nom Max 4.8 5.0 5.2 4.2 4.4 4.6 1.5 0.05 1.9 0.35 0.4 0.5 0.13 0.15 0.2 0 10 5.9 6.2 6.5 1.12 1.27 1.42 0.1 0.2 0.4 0.6
A
REJ03D0777-0200 Rev.2.00 Aug 20, 2007 Page 11 of 11
L
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