M51957B [RENESAS]
Voltage Detecting, System Resetting IC Series; 电压检测，设备重新启动IC系列
| 型号： | M51957B |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | Voltage Detecting, System Resetting IC Series |
| 文件： | 总14页 (文件大小：179K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M51957A,B/M51958A,B
Voltage Detecting, System Resetting IC Series
REJ03D0778-0200
Rev.2.00
Aug 20, 2007
Description
M51957A,B/M51958A,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 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 µF) (M51957, M51958)
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
M51957AL/BL
M51958AL/BL
M51957AFP/BFP
M51958AFP/BFP
5 Output
NC
Input
NC
1
2
3
4
8
7
6
5
NC
4 Delay capacitor
3 GND
Power-supply
Output
2 Input
GND
Delay capacitor
1 Power-supply
(Top view)
(Top view)
NC: No Connection
Outline: 5P5T
Outline: PRSP0008DE-C (recommend)
PRSP0008DA-A (8P2S-A) (not recommend for new design)
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 1 of 13
M51957A,B/M51958A,B
Block Diagram
M51957A, B
M51958A, B
Power-
supply
Power-
supply
A: Built-in Load
B: Open Collector
A: Built-in Load
B: Open Collector
5µA
Typ
25µA
Typ
5µA
Typ
25µA
Typ
Output
Output
–
+
–
+
Input
Input
–
+
1.25V
1.25V
GND
Delay capacitor
GND
Delay capacitor
Operating Waveform
M51957A, B
M51958A, B
1.25V
1.25V
t
t
t
t
H
L
H
L
td
td
td
td
td ≈ 0.34 × Cd(pF) µs
td ≈ 0.34 × Cd(pF) µs
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 2 of 13
M51957A,B/M51958A,B
Absolute Maximum Ratings
(Ta = 25°C, unless otherwise noted)
Item
Symbol
VCC
Ratings
18
Unit
V
Conditions
Supply voltage
Output sink current
Output voltage
Isink
VO
6
mA
V
VCC
18
Type A (output with constant current load)
Type B (open collector output)
5-pin SIP
Power dissipation
Thermal derating
Pd
450
400
300
4.5
mW
8-pin SOP (PRSP0008DE-C): recommend
8-pin SOP (PRSP0008DA-A): not recommend
Kθ
mW/°C Refer to the
thermal derating
curve.
5-pin SIP
4.4
8-pin SOP (PRSP0008DE-C)
: recommend
3
8-pin SOP (PRSP0008DA-A)
: not recommend
Operating temperature Topr
–30 to +85
–40 to +125
–0.3 to VCC
–0.3 to +7
°C
°C
V
Storage temperature
Input voltage range
Tstg
VIN
VCC ≤ 7 V
VCC > 7 V
Electrical Characteristics
(Ta = 25°C, unless otherwise noted)
•
•
“L” reset type M51957A, M51957B
“H” reset type M51958A, M51958B
Item
Symbol
VS
Min
1.20
9
Typ
1.25
15
Max
Unit
V
Test Conditions
Detecting voltage
Hysteresis voltage
1.30
23
∆VS
mV
%/°C
VCC = 5V
Detecting voltage
VS/∆T
—
0.01
—
temperature coefficient
Supply voltage range
Input current
VCC
IIN
2
—
—
—
1.6
—
—
—
—
—
—
100
390
360
3.4
17
500
590
540
7
V
nA
µA
VIN = 1.25V
Circuit current
ICC
Type A, VCC = 5V
Type B, VCC = 5V
Cd = 0.01µF *
Delay time
tpd
ms
V
Output saturation
voltage
Vsat
0.2
0.4
0.4
0.8
0.7
1
L reset type, VCC = 5V, VIN < 1.2V, Isink = 4mA
H reset type, VCC = 5V, VIN > 1.35V, Isink = 4mA
0.2
Threshold operating
voltage
VOPL
0.67
0.55
—
V
L reset type minimum supply
voltage for IC operation
RL = 2.2kΩ, Vsat ≤ 0.4V
RL = 100kΩ, Vsat ≤ 0.4V
Output leakage
current
IOH
µA
Type B
Output load current
Output high voltage
IOC
–40
–25
–17
—
µA
Type A, VCC = 5V, VO = 1/2 × VCC
VOH
VCC–0.2 VCC–0.06
V
Type A
Note: Please set the desired delay time by attaching capacitor of the range between 4700 pF and 10 µF.
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 3 of 13
M51957A,B/M51958A,B
Typical Characteristics
Thermal Derating
(Maximum Rating)
Detection Voltage vs. Ambient Temperature
(Input voltage detection series)
1.28
500
400
300
200
100
0
5-pin SIP
1.27
8-pin SOP
(PRSP0008DE-C)
: recommend
8-pin SOP
VSH
1.26
(PRSP0008DA-A)
: not recommend
VSL
1.25
1.24
1.23
1.22
85
0
25
50
75
100 125
–40 –20
0
20 40 60 80 100
Ambient Temperature Ta (°C)
Ambient Temperature Ta (°C)
Detection Voltage vs. Supply Voltage
(Input voltage detection series)
Input Current vs. Supply Voltage
(Input voltage detecting series)
1.28
250
200
150
100
50
VIN = 1.25V
1.27
1.26
1.25
1.24
1.23
1.22
VSH
Ta = –30°C
VSL
Ta = 25°C
Ta = 85°C
0
0
0
4
8
12
16
20
4
8
12
16
20
Supply Voltage VCC (V)
Supply Voltage VCC (V)
Delay Capacitance vs. Delay Time
(M5195xx, External delay capacitor type)
Delay Time vs. Ambient Temperature
(M5195xx, External delay capacitor type)
10
7
5
6
VCC = 5V
CD = 0.01µF
3
5
1
7
5
4
3
VCC = 5V
0.1
7
5
3
2
1
10V
VCC = 15V
3
0.01
7
5
3
0.001
0
–40 –20
0.1
3
5 7 1
3 5 7 10 3 5 7 100 3 5 7 1000
0
20 40 60 80 100
Delay Time tpd (ms)
Ambient Temperature Ta (°C)
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 4 of 13
M51957A,B/M51958A,B
Canstant Current at Cd pin vs. Ambient Temperature
(M5195xx, External delay capacitor type)
–12
Threshold Operating Voltage
([L] reset type)
1.0
0.8
0.6
0.4
0.2
0
VCC = 5V
Ta = 25°C
VCC = 15V
–10
–8
–6
–4
–2
0
RL = 2.2kΩ
RL = 22kΩ
RL = 100kΩ
–40 –20
0
20 40 60 80 100
0
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 Saturation Voltage vs. Output Sink Current
0.3
Supply voltage detecting "L" reset type
–40
: VCC = 4V
Except above mentioned
: VCC = 5V
0.2
–30
–20
–10
0
VCC = 5V VCC = 10V VCC = 15V
0.1
0
0
1
2
3
4
5
6
0
4
8
12
16
Output Sink Current Isink (mA)
Output Voltage VO (V)
Circuit Current vs. Supply Voltage
(M51957B, M51958B)
800
Ta = –30°C
600
400
200
0
Ta = 25°C
Ta = 85°C
0
4
8
12
16
Supply Voltage VCC (V)
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 5 of 13
M51957A,B/M51958A,B
Example of Application Circuit
Reset Circuit of M5195xx Series
VCC
Power-
supply
Power-
supply
R1
RL
Input
Output
M51957x
M51958x
RESET (RESET)
Logic circuit
R2
GND
Delay capacitor
Cd
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. 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 × (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 µs.
If a longer delay time is necessary, M51953, M51954, M51957 and M51958 are used. In this case, the delay
time is about 0.34 × Cd (pF) µs.
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
(b) Reset at transistor ON
Power-
VCC
VCC
Power-
supply
Power-
supply
Power-
supply
supply
R1
R1
RL
RL
Out
put
Out
put
Input
Input
M5195xx
(External delay
capacitor type)
M5195xx
(External delay
capacitor type)
RESET (RESET)
Logic circuit
RESET (RESET)
Logic circuit
R2
R2
GND
Delay capacitor
Cd
GND
GND
Delay capacitor
Cd
GND
Control
signal
Figure 2 Case of Using Reset Signal except Supply Voltage in the M5195xx Series
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 6 of 13
M51957A,B/M51958A,B
Delay Waveform Generating Circuit
When M51957 and M51958 are used, a waveform with a large delay time can generate only by adding a small capacitor.
Power-supply
R1
Input
Output
M51957 or M51958
GND
R2
Delay capacitor
Cd
Figure 3 Delay Waveform Generating Circuit
Operating Waveform
(a) M51957
(b) M51958
Input
(VCC partial
pressure)
Input
(VCC partial
pressure)
td
td
Output
Output
td ≈ 0.34 × Cd(pF) µs
Figure 4 Operating Waveform
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 7 of 13
M51957A,B/M51958A,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 5.
VCC
+
C1
C2
Power-supply
R1
Input
Output
Example of ripple
noise measures
M51957
M51958
Vin
R2
GND
Delay capacitor
Cd
Figure 5 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).
Power-supply
Input
Output
M51957
M51958
Vin
GND
Delay capacitor
Cd
Figure 6 Recommended Example
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 8 of 13
M51957A,B/M51958A,B
Independent
VCC
1
VCC
2
VCC
Independent
Input
Power-supply
Power-supply
Input
Output
Output
M51957
M51958
M51957
M51958
Vin
Vin
VCC
GND
GND
Delay capacitor
Cd
GND
Delay capacitor
Cd
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 7
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 + R2
VS = 1.25 ×
+ Iin × R1
R2
error margin
VCC
Power-supply
R1
Iin
→
Output
M51957
M51958
Vin
R2
Input
GND
Delay capacitor
Cd
Figure 8 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.
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 9 of 13
M51957A,B/M51958A,B
Setting of Delay Capacity
Please use capacitor Cd for the delay within the range of 10 µF 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
tpd
Output
tPHL
Figure 9 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 × tpd to 2.05 × tpd. For instance, 34 seconds can be calculated at 100 µF. 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 µs when delay capacitor Cd = 0.1 µF.
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 µs in case of
circuit constant C1 = 100 µF.
(Characteristic graph 1 is used and extrapolation in case of Cd = 100 µF.)
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)
Characteristic Graph 1
Reaction Time vs. Delay Capacitance
(Example data)
Characteristic Graph 2
Delay Time vs. Momentary Voltage Decrease Pulse Width
(Example data)
1000
10000
Delay Capacitance
0.01µF
0.033µF
0.1µF
0.33µF
1µF
2.2µF
3.3µF
200
100
1000
100
10
10
1
1
0.01
0.1
1
10
100
1
10
100
Pulse Width (µs)
1000
10000
Delay Capacitance Cd (µF)
Figure 10 Characteristic Graph
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 10 of 13
M51957A,B/M51958A,B
Setting of Output Load Resistance (M51957B/M51958B)
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 11 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.
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 11 of 13
M51957A,B/M51958A,B
Package Dimensions
5P5T
Plastic 5pin 240mil SIP
EIAJ Package Code
SIP5-P-240-2.54
JEDEC Code
–
Weight(g)
0.22
Lead Material
Cu Alloy
D
E
Dimension in Millimeters
Symbol
A
Min
–
Nom
–
Max
6.1
–
E1
1
5
b
b2
c
–
A
A
1
2
1.4
–
e
b1
–
4.0
0.5
1.2
0.85
0.27
11.7
1.97
0.7
2.54
–
SEATING PLANE
b
0.4
1.1
0.75
0.22
11.5
1.77
0.6
–
0.6
1.5
1.15
0.34
11.9
2.17
0.8
–
b
1
b2
c
D
E
E
1
e
L
–
3.0
JEITA Package Code
P-SOP8-4.4x4.85-1.27
RENESAS Code
PRSP0008DE-C
Previous Code
MASS[Typ.]
0.1g
—
F
*1
D
NOTE)
8
5
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
bp
Index mark
Terminal cross section
( Ni/Pd/Au plating )
Dimension in Millimeters
Reference
Symbol
1
4
Min Nom Max
*3
e
bp
Z
D
E
A2
4.65 4.85 5.05
4.4 4.6
1.85
x
M
4.2
L1
A1 0.00 0.1 0.20
2.03
A
bp 0.34 0.4 0.46
b1
c
c1
0.15 0.20 0.25
L
θ
0° 8°
HE 5.7 6.2 6.5
y
Detail F
e
1.12 1.27 1.42
0.12
x
y
Z
L
0.10
0.75
0.25 0.45 0.65
0.90
L1
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 12 of 13
M51957A,B/M51958A,B
JEITA Package Code
P-SOP8-4.4x5-1.27
RENESAS Code
Previous Code
8P2S-A
MASS[Typ.]
0.07g
PRSP0008DA-A
8
5
F
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
1
4
Index mark
c
A2
A1
*2
D
Dimension in Millimeters
Reference
Symbol
Min Nom Max
D
E
4.8 5.0 5.2
4.2 4.4 4.6
1.5
A2
A1
A
0.05
*3
bp
e
1.9
0.35 0.4 0.5
0.13 0.15 0.2
y
bp
c
Detail F
0°
10°
HE
e
5.9 6.2 6.5
1.12 1.27 1.42
0.1
y
L
0.2 0.4 0.6
REJ03D0778-0200 Rev.2.00 Aug 20, 2007
Page 13 of 13
Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
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arising out of the use of Renesas products beyond such specified ranges.
10. Although Renesas endeavors to improve the quality and reliability of its products, IC products have specific characteristics such as the occurrence of failure at a certain
rate and malfunctions under certain use conditions. Please be sure to implement safety measures to guard against the possibility of physical injury, and injury or damage
caused by fire in the event of the failure of a Renesas product, such as safety design for hardware and software including but not limited to redundancy, fire control and
malfunction prevention, appropriate treatment for aging degradation or any other applicable measures. Among others, since the evaluation of microcomputer software
alone is very difficult, please evaluate the safety of the final products or system manufactured by you.
11. In case Renesas products listed in this document are detached from the products to which the Renesas products are attached or affixed, the risk of accident such as
swallowing by infants and small children is very high. You should implement safety measures so that Renesas products may not be easily detached from your products.
Renesas shall have no liability for damages arising out of such detachment.
12. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written approval from Renesas.
13. Please contact a Renesas sales office if you have any questions regarding the information contained in this document, Renesas semiconductor products, or if you have
any other inquiries.
RENESAS SALES OFFICES
http://www.renesas.com
Refer to "http://www.renesas.com/en/network" for the latest and detailed information.
Renesas Technology America, Inc.
450 Holger Way, San Jose, CA 95134-1368, U.S.A
Tel: <1> (408) 382-7500, Fax: <1> (408) 382-7501
Renesas Technology Europe Limited
Dukes Meadow, Millboard Road, Bourne End, Buckinghamshire, SL8 5FH, U.K.
Tel: <44> (1628) 585-100, Fax: <44> (1628) 585-900
Renesas Technology (Shanghai) Co., Ltd.
Unit 204, 205, AZIACenter, No.1233 Lujiazui Ring Rd, Pudong District, Shanghai, China 200120
Tel: <86> (21) 5877-1818, Fax: <86> (21) 6887-7898
Renesas Technology Hong Kong Ltd.
7th Floor, North Tower, World Finance Centre, Harbour City, 1 Canton Road, Tsimshatsui, Kowloon, Hong Kong
Tel: <852> 2265-6688, Fax: <852> 2730-6071
Renesas Technology Taiwan Co., Ltd.
10th Floor, No.99, Fushing North Road, Taipei, Taiwan
Tel: <886> (2) 2715-2888, Fax: <886> (2) 2713-2999
Renesas Technology Singapore Pte. Ltd.
1 Harbour Front Avenue, #06-10, Keppel Bay Tower, Singapore 098632
Tel: <65> 6213-0200, Fax: <65> 6278-8001
Renesas Technology Korea Co., Ltd.
Kukje Center Bldg. 18th Fl., 191, 2-ka, Hangang-ro, Yongsan-ku, Seoul 140-702, Korea
Tel: <82> (2) 796-3115, Fax: <82> (2) 796-2145
Renesas Technology Malaysia Sdn. Bhd
Unit 906, Block B, Menara Amcorp, Amcorp Trade Centre, No.18, Jalan Persiaran Barat, 46050 Petaling Jaya, Selangor Darul Ehsan, Malaysia
Tel: <603> 7955-9390, Fax: <603> 7955-9510
© 2007. Renesas Technology Corp., All rights reserved. Printed in Japan.
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