Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
GENERAL DESCRIPTION
The NE56631-XX is a family of Active-LOW, power-on resets that
offers precision threshold voltage detection within
±3%
and super
low operating supply current of typically 1.5
µA.
Several detection threshold voltages are available at 1.9 V, 2.0 V,
2.7 V, 2.8 V, 2.9 V, 3.0 V, 3.1 V, 4.2 V, 4.3 V, 4.4 V, 4.5 V, and 4.6 V.
Other thresholds are offered upon request at 100 mV steps from
1.9 V to 4.6 V.
With its ultra low supply current and high precision voltage threshold
detection capability, the NE56631-XX is well suited for various
battery powered applications such as reset circuits for logic and
microprocessors, voltage check, and level detecting.
FEATURES
•
High precision threshold detection voltage:
•
Super low operating supply current:
I
CCH
=1.5
µA
typ.; I
CCL
=1.0
µA
typ.
APPLICATIONS
V
S
±3%
•
Hysteresis voltage: 50 mV typ.
•
Internal Power-On-Reset Delay time: 20
µs
typ.
•
Detection threshold voltage: 1.9 V, 2.0 V, 2.7 V, 2.8 V, 2.9 V,
3.0 V, 3.1 V, 4.2 V, 4.3 V, 4.4 V, 4.5 V, and 4.6 V
•
Reset for microprocessor and logic circuits
•
Voltage level detection circuit
•
Battery voltage check circuit
•
Detection circuit for battery backup
•
Other detection threshold voltages available upon request at
100 mV steps from 1.9 V to 4.6 V
•
Large low reset output current: 30 mA typ.
•
Reset assertion with V
CC
down to 0.65 V typ.
SIMPLIFIED SYSTEM DIAGRAM
V
CC
V
CC
NE56631-XX
V
OUT
GND
RESET
LOGIC SYSTEM
SL01739
Figure 1. Simplified system diagram.
2003 Oct 14
2
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
ORDERING INFORMATION
TYPE NUMBER
NE56631-XXD
PACKAGE
DESCRIPTION
plastic small outline package; 5 leads (see dimensional drawing)
VERSION
SOP003
TEMPERATURE
RANGE
–20 to +75
°C
NOTE:
The device has 12 voltage output options, indicated by the XX on
the ‘Type number’.
XX
19
20
27
28
29
30
31
42
43
44
45
46
VOLTAGE (Typical)
1.9 V
2.0 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
PIN CONFIGURATION
PIN DESCRIPTION
PIN
SYMBOL
NC
SUB
GND
V
OUT
V
CC
DESCRIPTION
No connection.
Substrate. Connect to ground (GND).
Ground. Negative supply.
Reset output (RESET).
Active-LOW, open collector.
Positive supply voltage
1
2
NC
1
5
V
CC
SUB
2
NE56631-XX
3
4
4
V
OUT
GND
3
5
SL01737
Figure 2. Pin configuration.
MAXIMUM RATINGS
SYMBOL
V
CC
T
amb
T
stg
P
D
Supply voltage
Ambient operating temperature
Storage temperature
Power dissipation
PARAMETER
MIN.
–0.3
–20
–40
–
MAX.
+10
+75
+125
150
UNIT
V
°C
°C
mW
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Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
ELECTRICAL CHARACTERISTICS
T
amb
= 25
°C,
unless otherwise specified.
SYMBOL
V
S
∆V
S
V
S
/∆T
V
OL
I
LO
I
CCL
I
CCH
t
PLH
t
PHL
V
OPL
I
OL1
I
OL2
PARAMETER
Detection threshold voltage
Hysteresis voltage
Detection threshold voltage
temperature coefficient
LOW-level output voltage
Output leakage current
Supply current (LOW Reset)
Supply current (HIGH Reset)
HIGH-to-LOW delay time
LOW–to-HIGH delay time
Minimum operating threshold voltage
Output current (LOW Reset) 1
Output current (LOW Reset) 2
CONDITIONS
R
L
= 470
Ω;
V
OL
≤
0.4 V;
V
CC
= HIGH-to-LOW
R
L
= 470
Ω;
V
CC
= LOW-to-HIGH-to-LOW
R
L
= 470
Ω;
T
amb
= –20
°C
to +75
°C
V
CC
= V
S(min)
– 0.05 V; R
L
= 470
Ω
V
CC
= 10 V; V
O
= V
CC
V
CC
= V
S(min)
– 0.05 V; R
L
=
∞
V
CC
= V
S(typ)
/ 0.85 V; R
L
=
∞
C
L
= 100 pF; R
L
= 4.7 kΩ
C
L
= 100 pF; R
L
= 4.7 kΩ
R
L
= 4.7 kΩ; V
OL
≤
0.4 V
V
O
= 0.4 V; R
L
= 0;
V
CC
= V
S(min)
– 0.05 V
V
O
= 0.4 V; R
L
= 0;
V
CC
= V
S(min)
– 0.15 V;
T
amb
= –30
°C
to +80
°C
MIN.
0.97 V
S
30
–
–
–
–
–
–
–
–
–
–
TYP.
V
S
50
±0.01
0.2
–
1.0
1.5
20
20
0.65
30
23
MAX.
1.03 V
S
100
–
0.4
±0.1
2.0
2.5
60
60
0.80
–
–
UNIT
V
mV
%/°C
V
V
µA
µA
µs
µs
V
mA
mA
2003 Oct 14
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Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
TYPICAL PERFORMANCE CURVES
4.60
R
L
= 470
Ω
V
OL
≤
0.4 V
V
CC
= HIGH-to-LOW
DETECTION VOLTAGE, V
S
(mV)
4.55
OUTPUT CURRENT (RESET LOW), I
OL
(mA)
34
V
O
= 0.4 V
R
L
= 0
V
CC
= V
S(min)
– 0.05 V
33
32
4.50
31
30
4.45
29
4.40
–25
0
25
50
75
28
–25
0
25
50
75
AMBIENT TEMPERATURE, T
amb
(°C)
AMBIENT TEMPERATURE, T
amb
(°C)
SL01845
SL01841
Figure 3. Detection voltage versus ambient temperature.
1.8
SUPPLY CURRENT (RESET LOW), I
CCL
(
µ
A)
Figure 4. Detection voltage versus ambient temperature.
80
HYSTERESIS VOLTAGE,
∆
V
S
(mV)
V
CC
= V
S(min)
– 0.05 V
R
L
=
∞
1.7
R
L
= 470
Ω
V
CC
= LOW-to-HIGH-to-LOW
70
60
1.6
50
1.5
40
1.4
30
1.3
–25
0
25
50
75
20
–25
0
25
50
75
AMBIENT TEMPERATURE, T
amb
(°C)
AMBIENT TEMPERATURE, T
amb
(°C)
SL01840
SL01842
Figure 5. Supply current (Reset LOW) versus
ambient temperature.
MINIMUM OPERATING THRESHOLD VOLTAGE,
V
OPL
(V)
0.9
Figure 6. Hysteresis voltage versus ambient temperature.
190
LOW-LEVEL OUTPUT VOLTAGE, V
OL
(V)
R
L
= 4.7 kΩ
V
OL
≤
0.4 V
V
CC
= V
S(min)
– 0.05 V
R
L
= 470
Ω
170
0.8
0.7
150
0.6
130
0.5
0.4
–25
0
25
50
75
110
–25
0
25
50
75
AMBIENT TEMPERATURE, T
amb
(°C)
AMBIENT TEMPERATURE, T
amb
(°C)
SL01844
SL01843
Figure 7. Minimum operating threshold voltage versus
ambient temperature.
Figure 8. LOW-level output voltage versus
ambient temperature.
2003 Oct 14
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Embedded System
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