RNA51955APT0 [RENESAS]
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8, 6.30 X 9.60 MM, 2.54 MM PITCH, PLASTIC, DIP-8;
| 型号： | RNA51955APT0 |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8, 6.30 X 9.60 MM, 2.54 MM PITCH, PLASTIC, DIP-8 光电二极管 |
| 文件： | 总12页 (文件大小：123K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary Datasheet
RNA51955A, B
Voltage Detecting, System Resetting IC Series
R03DS0004EJ0300
Rev.3.00
Jun 19, 2012
Description
RNA51955A,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
Ordering Information
Taping Abbreviation
Package
Abbreviation
Surface
Treatment
Part Name
Package Type
Package Code
(Quantity)
RNA51955AFPH0
RNA51955APT0
RNA51955BFPH0
RNA51955BPT0
SOP-8 pin
DIP-8 pin
SOP-8 pin
DIP-8 pin
PRSP0008DE-C
PRDP0008AF-B
PRSP0008DE-C
PRDP0008AF-B
FP
P
H (2,500 pcs / Reel)
T (1,000 pcs / Box)
H (2,500 pcs / Reel)
T (1,000 pcs / Box)
0 (Ni/Pd/Au)
0 (Ni/Pd/Au)
0 (Ni/Pd/Au)
0 (Ni/Pd/Au)
FP
P
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
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 1 of 11
RNA51955A, B
Preliminary
Outline and Article Indication
• RNA51955A, B
Part No.
Lot No.
R 9 5 5 A
YMWC
CCC
R 9 5 5 B
YMWC
CCC
Y: Year Code
(the last digit of year)
M: Month Code
W: Week Code
C: Control Code
SOP-8
Pin No.1
Trace Code
Part No.
R 5 1 9 5 5 A
R 5 1 9 5 5 B
Y M W
Y M W
DIP-8
W: Week Code
M: Month Code
Y: Year Code
Pin Arrangement
RNA51955A, B
NC
Input
NC
1
2
3
4
8
NC
7
6
5
Power-supply
Output
NC
GND
(Top view)
NC: No Connection
Outline: PRSP0008DE-C (SOP-8)
PRDP0008AF-B (DIP-8)
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 2 of 11
RNA51955A, B
Preliminary
Block Diagram
RNA51955A, B
Power-
supply
A: Built-in Load
B: Open Collector
25 μA
Typ
Output
–
+
Input
–
C
1.25 V
Delay capacitor
GND
Operating Waveform
RNA51955A, B
1.25 V
t
t
H
L
td
td
td ≈ 200 μs
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 3 of 11
RNA51955A, B
Preliminary
Absolute Maximum Ratings
(Ta = 25°C, unless otherwise noted)
Item
Symbol
VCC
Ratings
Unit
V
Conditions
Supply voltage
Output sink current
18
6
Isink
mA
VCC
Type A (output with constant current load)
Output voltage
VO
Pd
K
V
18
Type B (open collector output)
8-pin SOP (PRSP0008DE-C)
8-pin DIP (PRDP0008AF-B)
8-pin SOP (PRSP0008DE-C)
8-pin DIP (PRDP0008AF-B)
400
Power dissipation
Thermal derating
mW
570
4.4
Refer to the thermal
derating curve.
mW/°C
8.3
Operating temperature Topr
–40 to +85
–55 to +125
–0.3 to VCC
–0.3 to +7
°C
°C
Storage temperature
Tstg
VCC 7 V
Input voltage range
VIN
V
VCC > 7 V
Electrical Characteristics
(Ta = 25°C, unless otherwise noted)
“L” reset type
Item
Symbol
VS
Min
Typ
Max
Unit
V
Test Conditions
Detecting voltage
Hysteresis voltage
1.20
9
1.25
15
1.30
23
VS
mV
VCC = 5V
Detecting voltage
VS/T
VCC
Vin
IIN
—
0.01
—
%/°C
V
temperature coefficient
Supply voltage range
Input voltage range
Input current
2
–0.3
–0.3
—
—
—
17
VCC
7.0
VCC 7V
V
—
VCC > 7V
100
390
360
200
500
590
540
500
nA
A
s
V
VIN = 1.25V
—
Type A, VCC = 5V
Type B, VCC = 5V
Circuit current
ICC
—
Delay time
tpd
80
Output saturation
voltage
Vsat
—
0.2
0.4
L reset type, VCC = 5V, VIN < 1.2V, Isink = 4mA
—
—
0.67
0.55
0.8
0.7
RL = 2.2k, Vsat 0.4V
Threshold operating
voltage
L reset type minimum supply
voltage for IC operation
VOPL
V
RL = 100k, Vsat 0.4V
Output leakage
current
IOH
—
—
30
nA
Type B
Output load current
Output high voltage
IOC
–40
–25
–17
—
A
Type A, VCC = 5V, VO = 1/2 VCC
VOH
VCC–0.2 VCC–0.06
V
Type A
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 4 of 11
RNA51955A, B
Preliminary
Typical Characteristics
Thermal Derating
Detection Voltage vs. Ambient Temperature
600
500
400
300
200
100
0
1.28
1.27
1.26
1.25
1.24
1.23
1.22
8-pin DIP
(PRDP0008AF-B)
VSH
VSL
8-pin SOP
(PRSP0008DE-C)
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
1.28
Input Current vs. Supply Voltage
VIN = 1.25 V
250
200
150
100
50
1.27
1.26
1.25
1.24
1.23
1.22
VSH
Ta = –40°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 Time vs. Ambient Temperature
350
Threshold Operating Voltage
1.0
0.8
0.6
0.4
0.2
0
Ta = 25°C
300
250
200
150
100
50
VCC = 5V
10V
RL = 2.2 kΩ
RL = 22 kΩ
RL = 100 kΩ
VCC = 15V
0
–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)
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 5 of 11
RNA51955A, B
Preliminary
Output Load Current vs. Output Voltage
(RNA51955A)
Output Saturation Voltage vs. Output Sink Current
0.3
0.2
0.1
0
VCC = 4 V
–40
–30
–20
–10
0
VCC = 5 V VCC = 10 V VCC = 15 V
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
(RNA51955B)
800
600
400
200
0
Ta = –40°C
Ta = 25°C
Ta = 85°C
0
4
8
12
16
Supply Voltage VCC (V)
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 6 of 11
RNA51955A, B
Preliminary
Example of Application Circuit
Reset Circuit of RNA51955
VCC
Power-
supply
Power-
supply
R1
RL
Input
Output
RESET
Logic circuit
RNA51955x
R2
GND
GND
Figure 1 Reset Circuit of RNA51955
Notes: 1. The detecting supply voltage is VS (R1 +R2)/R2 (V) approximately. VS = 1.25 V (Typ)
The detecting supply voltage can be set between 2 V and 15 V.
2. Delay time must be longer than 200 s, RNA51953, RNA51957, and RNA51958 are used. In this case, the
delay time is about 0.34 Cd (pF) s.
3. If the RNA5195xx 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 a negative supply voltage is used, the supply voltage side of RNA5195xx and the GND side are
connected to negative supply voltage respectively.
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 7 of 11
RNA51955A, B
Preliminary
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
Power-supply
Output
R1
Input
Example of ripple
noise measures
Vin
R2
RNA51955
GND
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).
Power-supply
Input
Output
RNA51955
Vin
GND
Figure 3 Recommended Example
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 8 of 11
RNA51955A, B
Preliminary
Independent
VCC
1
VCC
2
VCC
Independent
Input
Power-supply
Output
Power-supply
Output
Input
Vin
RNA51955
Vin
RNA51955
VCC
GND
GND
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.
R + R
1
2
V = 1.25 ×
S
+ Iin × R
1
R
2
error margin
VCC
Power-supply
Output
R1
Iin
→
Vin
RNA51955
Input
R2
GND
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.
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 9 of 11
RNA51955A, B
Preliminary
Setting of Output Load Resistance (RNA51955B)
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 (2 V to 17 V)
RL
6
IL ≤ 4 mA
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/products/common_info/reliability/index.jsp
2. Additionally, please inquire of our company when there is an uncertain point on use.
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 10 of 11
RNA51955A, B
Preliminary
Package Dimensions
JEITA Package Code
P-SOP8-4.4x4.85-1.27
RENESAS Code
Previous Code
—
MASS[Typ.]
0.1g
PRSP0008DE-C
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
JEITA Package Code
P-DIP8-6.3x9.6-2.54
RENESAS Code
PRDP0008AF-B
Previous Code
DP-8FV
MASS[Typ.]
0.54g
D
8
5
1
4
b 3
0.89
Z
Dimension in Millimeters
Min Nom Max
7.62
Reference
Symbol
e1
D
E
A
A1
bp
b3
c
9.60 10.6
6.30 7.4
5.06
bp
e
c
0.5
0.40 0.48 0.56
1.30
0.19 0.25 0.31
e1
( Ni/Pd/Au plating )
θ
15°
0°
2.29 2.54 2.79
e
Z
1.27
2.54
L
R03DS0004EJ0300 Rev.3.00
Jun 19, 2012
Page 11 of 11
Notice
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Colophon 2.0
相关型号：
RNA51955BFPH0
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 4.40 X 4.85 MM, 1.27 MM PITCH, PLASTIC, SOP-8
RENESAS
RNA51955BPT0
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8, 6.30 X 9.60 MM, 2.54 MM PITCH, PLASTIC, DIP-8
RENESAS
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