Preliminary
Datasheet
RNA51958A, B
Voltage Detecting, System Resetting IC Series
Description
REJ03D0915-0302
Rev.3.02
Apr 01, 2010
RNA51958A,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
F)
Wide supply voltage range: 2 V to 17 V
Wide application range
Ordering Information
Part Name
RNA51958AFPH0
RNA51958APT0
RNA51958BFPH0
RNA51958BPT0
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 / Reel)
H (2,500 pcs / Reel)
T (1,000 pcs / Reel)
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
REJ03D0915-0302 Rev.3.02
Apr 01, 2010
Page 1 of 13
RNA51958A, B
Preliminary
Outline and Article Indication
•
RNA51958A, B
Part No.
R958A
YMWC
CCC
SOP-8
R958B
YMWC
CCC
Pin No.1
Lot No.
Y: Year Code
(the last digit of year)
M: Month Code
W: Week Code
C: Control Code
Trace Code
Part No.
R5 1 9 5 8A
Y MW
DIP-8
R5 1 9 5 8B
Y MW
W: Week Code
M: Month Code
Y: Year Code
Pin Arrangement
RNA51958A, B
NC 1
Input 2
NC 3
GND 4
(Top view)
NC: No Connection
Outline: PRSP0008DE-C (SOP-8)
PRDP0008AF-B (DIP-8)
8 NC
7 Power-supply
6 Output
5 Delay capacitor
REJ03D0915-0302 Rev.3.02
Apr 01, 2010
Page 2 of 13
RNA51958A, B
Preliminary
Block Diagram
RNA51958A, B
Power-
supply
A: Built-in Load
B: Open Collector
5
μA
Typ
Input
–
+
1.25 V
+
25
μA
Typ
Output
GND
Delay capacitor
Operating Waveform
RNA51958A, B
Input voltage
1.25 V
t
H
td
td
Output state
L
td
≈
0.34
×
Cd(pF)
μs
t
REJ03D0915-0302 Rev.3.02
Apr 01, 2010
Page 3 of 13
RNA51958A, 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
Input voltage range
Symbol
V
CC
Isink
V
O
Pd
K
Topr
Tstg
V
IN
Ratings
18
6
V
CC
18
400
570
4.4
8.3
–40 to +85
–55 to +125
–0.3 to V
CC
–0.3 to +7
Unit
V
mA
V
mW
mW/°C
°C
°C
V
V
CC
7 V
V
CC
> 7 V
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)
“H” reset type
Item
Detecting voltage
Hysteresis voltage
Detecting voltage
temperature coefficient
Supply voltage range
Input voltage range
Input current
Circuit current
Delay time
Constant current
Output saturation
voltage
Output leakage
current
Output load current
Output high voltage
Symbol
V
S
V
S
V
S
/T
V
CC
Vin
Iin
I
CC
t
pd
Ipd
Vsat
I
OH
I
OC
V
OH
Min
1.20
9
—
2
–0.3
–0.3
—
—
—
1.6
–8
—
—
–40
V
CC
–0.2
Typ
1.25
15
0.01
—
—
—
100
390
360
3.4
–5
0.2
—
–25
V
CC
–0.06
Max
1.30
23
—
17
V
CC
7.0
500
590
540
7.0
–3
0.4
30
–17
—
Unit
V
mV
%/°C
V
V
nA
A
ms
A
V
nA
A
V
V
CC
7V
V
CC
> 7V
Vin = 1.25V
V
CC
= 5V
Test Conditions
Type A
, V
CC
= 5V
Type B
, V
CC
= 5V
Cd = 0.01F *
V
CC
= 5V
V
CC
= 5V, Vin < 1.35V, Isink = 4mA
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.
REJ03D0915-0302 Rev.3.02
Apr 01, 2010
Page 4 of 13
RNA51958A, B
Preliminary
Typical Characteristics
Thermal Derating
600
Detection Voltage vs. Ambient Temperature
1.28
Power Dissipation Pd (mW)
Detection Voltage V
S
(V)
500
400
300
200
100
0
0
8-pin DIP
(PRDP0008AF-B)
1.27
V
SH
1.26
1.25
1.24
1.23
1.22
–40 –20
V
SL
8-pin SOP
(PRSP0008DE-C)
25
50
75
85
100
125
0
20
40
60
80 100
Ambient Temperature Ta (°C)
Ambient Temperature Ta (°C)
Detection Voltage vs. Supply Voltage
1.28
250
Input Current vs. Supply Voltage
V
IN
= 1.25 V
Detection Voltage V
S
(V)
Input Current I
IN
(nA)
1.27
1.26
1.25
V
SL
V
SH
200
150
Ta = –40°C
100
Ta = 25°C
1.24
1.23
1.22
0
50
0
0
Ta = 85°C
4
8
12
16
20
4
8
12
16
20
Supply Voltage V
CC
(V)
Supply Voltage V
CC
(V)
Delay Capacitance vs. Delay Time
Delay Time vs. Ambient Temperature
6
C
D
= 0.01
μF
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 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)
REJ03D0915-0302 Rev.3.02
Apr 01, 2010
Page 5 of 13
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