RNA51953A,B
Voltage Detecting, System Resetting IC Series
REJ03D0911-0100
Rev.1.00
Oct 10, 2008
Description
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
µF)
•
Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage):
0.6 V (Typ) at R
L
= 22 kΩ
•
Wide supply voltage range: 2 V to 17 V
•
Wide application range
•
Ordering Information
Part Name
RNA51953AFPH0
RNA51953BFPH0
Package Type
SOP-8 pin
SOP-8 pin
Package Code
PRSP0008DE-C
PRSP0008DE-C
Package
Abbreviation
FP
FP
Taping Abbreviation
(Quantity)
H (2,500 pcs / Reel)
H (2,500 pcs / Reel)
Surface
Treatment
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
Outline and Article Indication
•
RNA51953A, B
Type No.
R953A
YMWC
CCC
SOP-8
R953B
YMWC
CCC
Pin No.1
Trace Code
Lot No.
Y : Year Code
(the last digit of year)
M : Month Code
W : Week Code
C : Control Code
REJ03D0911-0100 Rev.1.00 Oct 10, 2008
Page 1 of 9
RNA51953A,B
Pin Arrangement
RNA51953AFP/BFP
NC 1
NC 2
NC 3
GND 4
(Top view)
NC: No Connection
8 NC
7 Power-supply
6 Output
5 Delay capacitor
Outline: PRSP0008DE-C
Block Diagram
RNA51953A, B
Power-
supply
A: Built-in Load
B: Open Collector
R1
–
R2
+
1.25V
5µA
Typ
–
25µA
Typ
Output
GND
Delay capacitor
Operating Waveform
RNA51953A, B
Supply voltage
4.25V
0.65V
t
H
td
td
Output state
L
Output
undefined
td
≈
0.34
×
Cd(pF)
µs
t
REJ03D0911-0100 Rev.1.00 Oct 10, 2008
Page 2 of 9
RNA51953A,B
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
Kθ
Topr
Tstg
Ratings
18
6
V
CC
18
400
4.4
–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)
Refer to the thermal
derating curve.
8-pin SOP (PRSP0008DE-C)
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
µA
ms
µA
V
V
nA
µA
V
Test Conditions
Type A
, V
CC
= 5V
Type B
, V
CC
= 5V
Cd = 0.01µF *
V
CC
= 5V
V
CC
= 4V, Isink = 4mA
R
L
= 2.2kΩ, Vsat
≤
0.4V
R
L
= 100kΩ, 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
µF.
REJ03D0911-0100 Rev.1.00 Oct 10, 2008
Page 3 of 9
RNA51953A,B
Typical Characteristics
Thermal Derating
500
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
400
300
200
100
0
0
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
= 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
Delay Time vs. Ambient Temperature
6
C
D
= 0.01µF
Delay Time t
pd
(ms)
5
4
V
CC
= 5V
3
2
1
0
–40 –20
10V
V
CC
= 15V
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
= 5V
V
CC
= 15V
Threshold Operating Voltage
1.0
0.8
0.6
R
L
= 2.2kΩ
Ta = 25°C
0.4
0.2
0
0
R
L
= 22kΩ
R
L
= 100kΩ
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)
REJ03D0911-0100 Rev.1.00 Oct 10, 2008
Page 4 of 9
RNA51953A,B
Output Load Current vs. Output Voltage
(RNA51953A)
Output Saturation Voltage vs. Output Sink Current
Output Saturation Voltage Vsat (V)
0.3
V
CC
= 4V
Output Load Current I
CC
(µA)
–40
0.2
–30
V
CC
= 5V
V
CC
= 10V
V
CC
= 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
(RNA51953B)
700
Output Voltage V
O
(V)
Circuit Current I
CC
(µA)
600
500
400
300
200
100
0
–40 –20
0
20
40
60
80 100
V
CC
= 5V
Ambient Temperature Ta (°C)
REJ03D0911-0100 Rev.1.00 Oct 10, 2008
Page 5 of 9
京公网安备 11010802033920号
EEWORLD
