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INTEGRATED CIRCUITS
NE56631-XX Active-LOW system reset
Product data Supersedes data of 2002 Oct 07 2003 Feb 14
Philips Semiconductors
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:
ICCH=1.5 µA typ.; ICCL=1.0 µA typ.
APPLICATIONS
VS ±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 VCC down to 0.65 V typ.
SIMPLIFIED SYSTEM DIAGRAM
VCC
VCC
NE56631-XX
VOUT GND RESET LOGIC SYSTEM
SL01739
Figure 1. Simplified system diagram.
2003 Feb 14
2
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
ORDERING INFORMATION
TYPE NUMBER NE56631-XXD PACKAGE NAME SOT23-5 / SOT25 (SO5) DESCRIPTION plastic small outline package; 5 leads (see dimensional drawing) 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 VOUT VCC 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
VCC
SUB
2
NE56631-XX
3 4
4 VOUT
GND
3
5
SL01737
Figure 2. Pin configuration.
MAXIMUM RATINGS
SYMBOL VCC Tamb Tstg PD 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
2003 Feb 14
3
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
ELECTRICAL CHARACTERISTICS
Tamb = 25 °C, unless otherwise specified. SYMBOL VS ∆VS VS/∆T VOL ILO ICCL ICCH tPLH tPHL VOPL IOL1 IOL2 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 RL = 470 Ω; VOL ≤ 0.4 V; VCC = HIGH-to-LOW RL = 470 Ω; VCC = LOW-to-HIGH-to-LOW RL = 470 Ω; Tamb = –20 °C to +75 °C VCC = VS(min) – 0.05 V; RL = 470 Ω VCC = 10 V; VO = VCC VCC = VS(min) – 0.05 V; RL = ∞ VCC = VS(typ) / 0.85 V; RL = ∞ CL = 100 pF; RL = 4.7 kΩ CL = 100 pF; RL = 4.7 kΩ RL = 4.7 kΩ; VOL ≤ 0.4 V VO = 0.4 V; RL = 0; VCC = VS(min) – 0.05 V VO = 0.4 V; RL = 0; VCC = VS(min) – 0.15 V; Tamb = –30 °C to +80 °C MIN. 0.97 VS 30 – – – – – – – – – – TYP. VS 50 ±0.01 0.2 – 1.0 1.5 20 20 0.65 30 23 MAX. 1.03 VS 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 Feb 14
4
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
TYPICAL PERFORMANCE CURVES
4.60 RL = 470 Ω VOL ≤ 0.4 V VCC = HIGH-to-LOW DETECTION VOLTAGE, VS (mV) 4.55 OUTPUT CURRENT (RESET LOW), I OL (mA) 34 VO = 0.4 V RL = 0 VCC = VS(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, Tamb (°C)
AMBIENT TEMPERATURE, Tamb (°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, ∆ VS (mV)
VCC = VS(min) – 0.05 V RL = ∞ 1.7
RL = 470 Ω VCC = 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, Tamb (°C)
AMBIENT TEMPERATURE, Tamb (°C)
SL01840
SL01842
Figure 5. Supply current (Reset LOW) versus ambient temperature.
MINIMUM OPERATING THRESHOLD VOLTAGE, VOPL (V) 0.9
Figure 6. Hysteresis voltage versus ambient temperature.
190 LOW-LEVEL OUTPUT VOLTAGE, VOL (V) RL = 4.7 kΩ V.