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M51953A,B/M51954A,B
Voltage Detecting, System Resetting IC Series
REJ03D0776-0200 Rev.2.00 Aug 20, 2007
Description
M51953A,B/M51954A,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 the desired retardation time simply by adding an external capacitor. They fined extensive applications, including battery checking circuit, level detecting circuit and waveform shaping circuit.
Features
* Few external parts * Large delay time with a capacitor of small capacitance (td 100 ms, at 0.33 F) (M51953, M51954) * 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
M51953AL/BL M51954AL/BL 5 Output 4 Delay capacitor 3 GND NC 3 2 NC 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 Delay capacitor 6 Output NC 1 NC 2 M51953AFP/BFP M51954AFP/BFP 8 NC 7 Power-supply
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 1 of 10
M51953A,B/M51954A,B
Block Diagram
M51953A, B Powersupply A: Built-in Load B: Open Collector M51954A, B Powersupply A: Built-in Load B: Open Collector
R1 - R2 + 1.25V
5A Typ -
25A Typ
R1 Output R2 - + 1.25V
5A Typ +
25A Typ
Output
GND
Delay capacitor
GND
Delay capacitor
Operating Waveform
M51953A, 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 0.34 x Cd(pF) s
Output state
L
td 0.34 x Cd(pF) s
t
t
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 2 of 10
M51953A,B/M51954A,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 Topr Tstg -30 to +85 -40 to +125 C C 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 M51953A, M51953B * "H" reset type M51954A, M51954B
Item Detecting voltage Hysteresis voltage Detecting voltage temperature coefficient Circuit current Delay time Constant current Output saturation voltage Threshold operating voltage Output leakage current Output load current Output high voltage Symbol VS VS VS/T ICC tpd Ipd Vsat VOPL IOH IOC VOH Min 4.05 30 -- -- -- 1.6 -8 -- -- -- -- -- -40 VCC-0.2 Typ 4.25 50 0.01 450 420 3.4 -5 0.2 0.2 0.67 0.55 -- -25 VCC-0.06 Max 4.45 80 -- 680 630 7 -3 0.4 0.4 0.8 0.7 1 -17 -- A A V V ms A V Unit V mV %/C A Test Conditions
Type A, VCC = 5V Type B, VCC = 5V
Cd = 0.01F * VCC = 5V 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
Type B Type A, VCC = 5V, VO = 1/2 x VCC Type A
Note:
Please set the desired delay time by attaching capacitor of the range between 4700 pF and 10 F.
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 3 of 10
M51953A,B/M51954A,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 (Supply voltage detection series) 4.34 4.32 4.30 4.28 4.26
VSL VSH
400 300 200 100 0 0
4.24 4.22 -40 -20
25
50
75 85 100
125
0
20
40
60
80 100
Ambient Temperature Ta (C) Delay Capacitance vs. Delay Time (M5195xx, External delay capacitor type)
Delay Capacitance Cd (F)
10 7V CC = 5V 5 3 1 7 5 3 0.1 7 5 3 0.01 7 5 3 0.001 0.1 3 57 1 3 5 7 10 3 5 7 100 3 5 7 1000
Ambient Temperature Ta (C) Delay Time vs. Ambient Temperature (M5195xx, External delay capacitor type) 6
CD = 0.01F
Delay Time tpd (ms)
5 4
VCC = 5V
3 2 1 0 -40 -20
10V VCC = 15V
0
20
40
60
80 100
Delay Time tpd (ms) Canstant Current at Cd pin vs. Ambient Temperature (M5195xx, External delay capacitor type) -12 -10 -8 -6 -4 -2 0 -40 -20
Output Voltage VOUT (V)
VCC = 5V VCC = 15V
Ambient Temperature Ta (C) Threshold Operating Voltage ([L] reset type) 1.0 0.8 0.6
RL = 2.2k Ta = 25C
Canstant Current at Cd pin Ipd (A)
0.4 0.2 0 0
RL = 22k RL = 100k
0
20
40
60
80 100
0.2
0.4
0.6
0.8
1.0
Ambient Temperature Ta (C)
Supply Voltage VCC (V)
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 4 of 10
M51953A,B/M51954A,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. Ambient Temperature (M51953B, M51954B) 700
Output Voltage VO (V)
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)
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 5 of 10
M51953A,B/M51954A,B
Example of Application Circuit
Reset Circuit of M5195xx Series
VCC
Powersupply M51953x M51954x GND Output
RL
Powersupply RESET (RESET) Logic circuit GND
Delay capacitor Cd
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. Case of Using Reset Signal except Supply Voltage in the M5195xx Series
(a) Reset at ON Powersupply M5195xx (External delay capacitor type) GND Powersupply RESET (RESET) Logic circuit GND VCC (b) Reset at transistor ON Powersupply M5195xx (External delay capacitor type) GND Powersupply RESET (RESET) Logic circuit GND VCC
Out put
RL
Out put
RL
Delay capacitor Cd
Delay capacitor Cd
Control signal
Figure 2 Case of Using Reset Signal except Supply Voltage in the M5195xx Series
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 6 of 10
M51953A,B/M51954A,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 3.
VCC
+
C1
C2
Power-supply M51953 M51954 GND Output
Example of ripple noise measures
Delay capacitor Cd
Figure 3 Example of Ripple Noise Measures
Setting of Delay Capacity Please use capacitor Cd for the delay within the range of 10 F or less. When a value that is bigger than this is set, the problem such as following (1), (2), and (3) becomes remarkable.
t
VCC Output
tpd
tPHL
Figure 4 Time Chart at Momentary Voltage-Decrease (1) The difference at delay time becomes remarkable. A long delay setting of tens of seconds is fundamentally possible. However, when set delay time is lengthened, the range of the difference relatively grows, too. When a set value is assumed to be `tpd', the difference occurs in the range from 0.47 x tpd to 2.05 x tpd. For instance, 34 seconds can be calculated at 100 F. However, it is likely to vary within the ranges of 16-70 seconds. (2) Difficulty to react to a momentary voltage decrease. For example, the reaction time tPHL is 10 s when delay capacitor Cd = 0.1 F. The momentary voltage-decrease that is longer than such tPHL are occurs, the detection becomes possible. When the delay capacitance is enlarged, tPHL also becomes long. For instance, it becomes about 100 to 200 s in case of circuit constant C1 = 100 F. (Characteristic graph 1 is used and extrapolation in case of Cd = 100 F.) Therefore, it doesn't react to momentary voltage-decrease that is shorter than this. (3) Original delay time is not obtained. When the momentary voltage-decrease time `t' is equivalent to tPHL, the discharge becomes insufficient and the charge starts at that state. This phenomenon occurs at large capacitance. And, original delay time tpd is not obtained. Please refer to characteristic graph 2. (Delay time versus input pulse width)
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 7 of 10
M51953A,B/M51954A,B
Characteristic Graph 1 Reaction Time vs. Delay Capacitance (Example data) 1000 Characteristic Graph 2 Delay Time vs. Momentary Voltage Decrease Pulse Width (Example data) 10000
Delay Capacitance 0.01F 0.033F 0.1F 0.33F 1F 2.2F 3.3F
Reaction Time tPHL (s)
200 100
Delay Time tpd (ms)
0.1 1 10 Delay Capacitance Cd (F) 100
1000
100
10
10
1 0.01
1 1
10
1000 100 Pulse Width (s)
10000
Figure 5 Characteristic Graph
Setting of Output Load Resistance (M51953B/M51954) 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.
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 8 of 10
M51953A,B/M51954A,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
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 9 of 10
M51953A,B/M51954A,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
REJ03D0776-0200 Rev.2.00 Aug 20, 2007 Page 10 of 10
L
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