Preliminary
Datasheet
RNA51953A, B
Voltage Detecting, System Resetting IC Series
Description
R03DS0009EJ0500
Rev.5.00
Jun 19, 2012
RNA51953A,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)
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
Part Name
RNA51953AFPH0
RNA51953APT0
RNA51953BFPH0
RNA51953BPT0
Package Type
SOP-8 pin
DIP-8 pin
SOP-8 pin
DIP-8 pin
Package Code
PRSP0008DE-C
PRDP0008AF-B
PRSP0008DE-C
PRDP0008AF-B
Package
Abbreviation
FP
P
FP
P
Taping Abbreviation
(Quantity)
H (2,500 pcs / Reel)
T (1,000 pcs / Box)
H (2,500 pcs / Reel)
T (1,000 pcs / Box)
Surface
Treatment
0 (Ni/Pd/Au)
0 (Ni/Pd/Au)
0 (Ni/Pd/Au)
0 (Ni/Pd/Au)
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
R03DS0009EJ0500 Rev.5.00
Jun 19, 2012
Page 1 of 10
RNA51953A, B
Preliminary
Absolute Maximum Ratings
(Ta = 25°C, unless otherwise noted)
Item
Supply voltage
Output sink current
Output voltage
Power dissipation
Thermal derating
Operating temperature
Storage temperature
Symbol
V
CC
Isink
V
O
Pd
K
Topr
Tstg
Ratings
18
6
V
CC
18
400
570
4.4
8.3
–40 to +85
–55 to +125
Unit
V
mA
V
mW
mW/°C
°C
°C
Conditions
Type A (output with constant current load)
Type B (open collector output)
8-pin SOP (PRSP0008DE-C)
8-pin DIP (PRDP0008AF-B)
8-pin SOP (PRSP0008DE-C)
Refer to the thermal
derating curve.
8-pin DIP (PRDP0008AF-B)
Electrical Characteristics
(Ta = 25°C, unless otherwise noted)
“L” reset type
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
V
S
V
S
V
S
/T
I
CC
t
pd
Ipd
Vsat
V
OPL
I
OH
I
OC
V
OH
Min
4.05
30
—
—
—
1.6
–8
—
—
—
—
–40
V
CC
–0.2
Typ
4.25
50
0.01
450
420
3.4
–5
0.2
0.67
0.55
—
–25
V
CC
–0.06
Max
4.45
80
—
680
630
7.0
–3
0.4
0.8
0.7
30
–17
—
Unit
V
mV
%/°C
A
ms
A
V
V
nA
A
V
Test Conditions
Type A
, V
CC
= 5V
Type B
, V
CC
= 5V
Cd = 0.01F *
V
CC
= 5V
V
CC
= 4V, Isink = 4mA
R
L
= 2.2k, Vsat
0.4V
R
L
= 100k, Vsat
0.4V
Type B
Type A
, V
CC
= 5V, V
O
= 1/2
V
CC
Type A
Note:
Please set the desired delay time by attaching capacitor of the range between 4700 pF and 10
F.
R03DS0009EJ0500 Rev.5.00
Jun 19, 2012
Page 4 of 10
RNA51953A, B
Preliminary
Typical Characteristics
Thermal Derating
600
Power Dissipation Pd (mW)
Detection Voltage V
S
(V)
Detection Voltage vs. Ambient Temperature
4.34
4.32
4.30
4.28
4.26
V
SL
V
SH
500
400
300
200
100
0
0
8-pin DIP
(PRDP0008AF-B)
8-pin SOP
(PRSP0008DE-C)
4.24
4.22
–40 –20
25
50
75
85
100
125
0
20
40
60
80 100
Ambient Temperature Ta (°C)
Ambient Temperature Ta (°C)
Delay Capacitance vs. Delay Time
Delay Capacitance Cd (μF)
10
7
V
CC
= 5 V
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
Delay Time vs. Ambient Temperature
6
C
D
= 0.01
μF
Delay Time t
pd
(ms)
5
4
V
CC
= 5 V
3
2
1
0
–40 –20
10 V
V
CC
= 15 V
0
20
40
60
80 100
Delay Time t
pd
(ms)
Ambient Temperature Ta (°C)
Canstant Current at Cd pin Ipd (μA)
Canstant Current at Cd pin vs. Ambient Temperature
–12
–10
–8
–6
–4
–2
0
–40 –20
Output Voltage V
OUT
(V)
V
CC
= 5 V
V
CC
= 15 V
Threshold Operating Voltage
1.0
0.8
0.6
R
L
= 2.2 kΩ
Ta = 25°C
0.4
0.2
0
0
R
L
= 22 kΩ
R
L
= 100 kΩ
0
20
40
60
80 100
0.2
0.4
0.6
0.8
1.0
Ambient Temperature Ta (°C)
Supply Voltage V
CC
(V)
R03DS0009EJ0500 Rev.5.00
Jun 19, 2012
Page 5 of 10
PCB Design
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