NE56631-30D-G [NXP]
IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5, 1.60 MM, PLASTIC, MO-178, SOP-5, Power Management Circuit;
| 型号： | NE56631-30D-G |
| 厂家： | 
NXP |
| 描述： | IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5, 1.60 MM, PLASTIC, MO-178, SOP-5, Power Management Circuit 输入元件 光电二极管 |
| 文件： | 总12页 (文件大小：114K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
NE56631-XX
Active-LOW system reset
Product data
2003 Oct 14
Supersedes data of 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
APPLICATIONS
• High precision threshold detection voltage:
• Super low operating supply current:
V
±3%
• Reset for microprocessor and logic circuits
• Voltage level detection circuit
S
I
=1.5 µA typ.;
I
=1.0 µA typ.
CCH
CCL
• Battery voltage check circuit
• Hysteresis voltage: 50 mV typ.
• Detection circuit for battery backup
• 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
• 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 down to 0.65 V typ.
CC
SIMPLIFIED SYSTEM DIAGRAM
V
CC
V
CC
NE56631-XX
V
RESET
OUT
LOGIC SYSTEM
GND
SL01739
Figure 1. Simplified system diagram.
2
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
TEMPERATURE
RANGE
DESCRIPTION
VERSION
SOP003
NE56631-XXD
plastic small outline package; 5 leads (see dimensional drawing)
–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
1
SYMBOL
NC
DESCRIPTION
No connection.
NC
SUB
GND
1
2
3
5
4
V
V
CC
2
SUB
Substrate. Connect to ground (GND).
Ground. Negative supply.
NE56631-XX
3
GND
4
V
OUT
Reset output (RESET).
Active-LOW, open collector.
OUT
5
V
CC
Positive supply voltage
SL01737
Figure 2. Pin configuration.
MAXIMUM RATINGS
SYMBOL
PARAMETER
MIN.
–0.3
–20
–40
–
MAX.
+10
UNIT
V
V
CC
Supply voltage
T
amb
Ambient operating temperature
Storage temperature
+75
°C
T
stg
+125
150
°C
P
D
Power dissipation
mW
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2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
ELECTRICAL CHARACTERISTICS
T
amb
= 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
Detection threshold voltage
R = 470 Ω; V ≤ 0.4 V;
0.97 V
V
1.03 V
100
–
V
S
L
OL
S
S
S
V
CC
= HIGH-to-LOW
∆V
Hysteresis voltage
R = 470 Ω;
30
–
50
mV
S
L
V
= LOW-to-HIGH-to-LOW
CC
V /∆T
S
Detection threshold voltage
temperature coefficient
R = 470 Ω; T = –20 °C to +75 °C
amb
±0.01
%/°C
L
V
LOW-level output voltage
V
= V
– 0.05 V; R = 470 Ω
–
–
–
–
–
–
–
–
0.2
–
0.4
±0.1
2.0
2.5
60
V
V
OL
CC
S(min)
L
I
I
I
t
t
Output leakage current
V
= 10 V; V = V
LO
CC O CC
Supply current (LOW Reset)
Supply current (HIGH Reset)
HIGH-to-LOW delay time
V
= V
– 0.05 V; R = ∞
1.0
1.5
20
µA
µA
µs
µs
V
CCL
CCH
PLH
PHL
CC
S(min)
L
V
= V
/ 0.85 V; R = ∞
S(typ) L
CC
C = 100 pF; R = 4.7 kΩ
L
L
LOW–to-HIGH delay time
Minimum operating threshold voltage
Output current (LOW Reset) 1
C = 100 pF; R = 4.7 kΩ
L
20
60
L
V
OPL
R = 4.7 kΩ; V ≤ 0.4 V
L
0.65
30
0.80
–
OL
I
V
= 0.4 V; R = 0;
mA
OL1
O
L
V
CC
= V
– 0.05 V
S(min)
I
Output current (LOW Reset) 2
V
CC
= 0.4 V; R = 0;
–
23
–
mA
OL2
O
L
V
= V
– 0.15 V;
S(min)
T
amb
= –30 °C to +80 °C
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2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
TYPICAL PERFORMANCE CURVES
4.60
34
33
V
= 0.4 V
= 0
R
V
= 470 Ω
≤ 0.4 V
O
L
R
V
L
OL
CC
= V
S(min)
– 0.05 V
V
= HIGH-to-LOW
CC
4.55
4.50
32
31
30
4.45
4.40
29
28
–25
0
25
50
(°C)
75
–25
0
25
50
(°C)
75
AMBIENT TEMPERATURE, T
AMBIENT TEMPERATURE, T
amb
amb
SL01845
SL01841
Figure 3. Detection voltage versus ambient temperature.
Figure 4. Detection voltage versus ambient temperature.
80
1.8
R
= 470 Ω
L
V
= V
– 0.05 V
CC
S(min)
V
= LOW-to-HIGH-to-LOW
CC
R
= ∞
L
70
60
1.7
1.6
50
40
1.5
1.4
1.3
30
20
–25
0
25
50
(°C)
75
–25
0
25
50
(°C)
75
AMBIENT TEMPERATURE, T
AMBIENT TEMPERATURE, T
amb
amb
SL01840
SL01842
Figure 6. Hysteresis voltage versus ambient temperature.
Figure 5. Supply current (Reset LOW) versus
ambient temperature.
0.9
190
R
= 4.7 kΩ
V
= V
S(min)
– 0.05 V
L
CC
V
≤ 0.4 V
R = 470 Ω
L
OL
0.8
170
150
0.7
0.6
130
110
0.5
0.4
–25
0
25
50
(°C)
75
–25
0
25
50
(°C)
75
AMBIENT TEMPERATURE, T
AMBIENT TEMPERATURE, T
amb
amb
SL01844
SL01843
Figure 7. Minimum operating threshold voltage versus
ambient temperature.
Figure 8. LOW-level output voltage versus
ambient temperature.
5
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
TECHNICAL DISCUSSION
The NE56631-XX is a Bipolar IC designed to provide power source
monitoring and a system reset function in the event the power sags
below an acceptable level for the system to operate reliably. The IC
is designed to generate a reset signal for a wide range of
microprocessor and other logic systems. The NE56631-XX can
operate at supply voltage up to 10 volts. The series includes several
devices with precision threshold reset voltage values of 1.9, 2.0, 2.7,
2.8, 2.9, 3.0, 3.1, 4.2, 4.3, 4.4, 4.5, 4.6 V. The reset threshold
incorporates a typical hysteresis of 50 mV to prevent erratic
reasserts from being generated. An internal fixed delay time circuit
provides a fixed power-on-reset delay of typically 20 µs with a
guaranteed maximum delay of 60 µs.
output of the comparator to go to a HIGH state. This causes the
common emitter amplifier, Q1 to turn on pulling down the
non-inverting terminal of the op amp, which causes its output to go
to a HIGH state. This high output level turns on the output common
emitter transistor, Q2. The collector output of Q2 is pulled LOW
through the external pull-up resistor, thereby asserting the
Active-LOW reset.
The bipolar common emitter transistor, Q1and the op amp
establishes threshold hysteresis by turning on when the threshold
comparator goes to a HIGH state (when V sags to or below the
CC
threshold level). With the output of Q2 connected to the
non-inverting terminal of the op amp, the non-inverting terminal of
the op amp has a level near ground at about 0.4 V when the reset is
asserted (Active-LOW). For the op amp to reverse its output, the
comparator output and Q1 must overcome the additional pull-down
voltage present on the op amp inverting input. The differential
voltage required to do this establishes the hysteresis voltage of the
sensed threshold voltage. Typically it is 50 mV.
The output of the NE56631-XX utilizes an open collector topology,
which requires an external pull-up resistor to V . Though this may
CC
be regarded as a disadvantage, it is advantageous in many
sensitive applications. Since the open collector output cannot source
reset current when both are operated from a common supply, the
NE56631-XX offers a safe interconnect to a wide variety of
microprocessors.
When V voltage sags, and it is below the detection Threshold
CC
The NE56631-XX operates at low supply currents, typically 1.5 µA,
while offering high precision of the threshold detection (±3%).
(V ), the device will assert a Reset LOW output at or near ground
SL
potential. As V voltage rises from (V < V ) to V or higher,
CC
CC
SL
SH
the Reset is released and the output follows V . Conversely,
CC
Figure 9 is a functional block diagram of the NE56631-XX. The
internal reference source voltage is typically 0.65 V over the
temperature range. The reference voltage is connected to the
non-inverting input of the threshold comparator while the inverting
input monitors the supply voltage through a voltage divider network
made up of R1 and R2. The output of the comparator drives the
series base resistor, R3 of a common emitter amplifier, Q1. The
collector of Q1 is connected through R4 to the inverting terminal of
the op amp. The op amp output is connected to the series base
resistor, R5 of the output common emitter transistor, Q2. The
collector output of Q2 is connected to the non-inverting terminal of
the op amp which drives it.
decreases in V from (V > V ) to V will cause the output to
CC
CC
SL
SL
be pulled to ground.
Hysteresis Voltage = Released Voltage – Detection Threshold
Voltage
∆V = V – V
SL
S
SH
where:
V
SH
V
SL
= V + ∆V
SL
S
S
= V – ∆V
SH
When V drops below the minimum operating voltage, typically
CC
0.65 V, the output is undefined and the output reset low assertion is
When the supply voltage sags to the threshold detection voltage, the
resistor divider network supplies a voltage to the inverting terminal of
not guaranteed. At this level of V the output will try to rise to V
.
CC
CC
the threshold comparator which is less than V , causing the
REF
5
4
V
V
CC
R1
CO1
OUT
R4
OP1
R5
V
REF
Q2
R3
R2
Q1
GND
3
SL01738
Figure 9. Functional diagram.
6
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
TIMING DIAGRAM
The Timing Diagram in Figure 10 depicts the operation of the device.
Letters A–J on the Time axis indicates specific events.
D-E: Between “D” and “E”, V starts rising.
CC
E: At “E”, V rises to the V level. Once again, the device
CC
SH
A: At “A”, V begins to increase. Also the V
voltage initially
releases the hold on the V reset. The Reset output tracks V
OUT CC
CC
OUT
increases but abruptly decreases when V reaches the level
as it rises above V
.
CC
SH
(approximately 0.65 V) that activates the internal bias circuitry and
RESET is asserted.
F-G: At “F”, V is above the upper threshold and begins to fall,
CC
causing V
to follow it. As long as V remains above the V
,
OUT
CC
SH
B: At “B”, V reaches the threshold level of V . At this point the
no reset signal will be triggered. Before V falls to the V , it
CC SH
CC
SH
device releases the hold on the V
reset. The Reset output V
begins to rise, causing V to follow it. At “G”, V returns to
OUT CC
OUT
OUT
tracks V as it rises above V (assuming the reset pull-up resistor
normal.
CC
SH
R
is connected to V ). In a microprocessor-based system these
CC
PU
H: At event “H”, V falls until the V undervoltage detection
CC
SL
events release the reset from the microprocessor, allowing the
microprocessor to function normally.
threshold is reached. At this level, a RESET signal is generated and
goes LOW.
V
OUT
C-D: At “C”, V begins to fall, causing V
to follow. V
CC
CC
OUT
J: At “J”, the V voltage has decreased until normal internal
CC
continues to fall until the V undervoltage detection threshold is
SL
circuit bias is unable to maintain a V
reset. As a result, V may
CC
OUT
reached at “D”. This causes a reset signal to be generated (V
RESET goes LOW).
OUT
rise to less than 0.65 V. As V decreases further, the V
reset
CC
OUT
also decreases to zero.
∆V
S
V
SH
V
SL
V
CC
0
V
OUT
0
A
B
C
D
E
F
G
H
J
TIME
SL01740
Figure 10. Timing diagram.
7
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
APPLICATION INFORMATION
V
CC
SUPPLY
V
CC
R
PU
CPU
V
OUT
NE56631-XX
RESET
V
SS
GND
SL01741
Figure 11. Conventional reset application for NE56631-XX.
V
CC
SUPPLY
R
D
R
PU
CPU
V
V
OUT
CC
NE56631-XX
RESET
V
SS
GND
SL01742
Figure 12. Power On Reset circuit for NE56631-XX.
The Power ON Reset Circuit shown in Figure 12 is an example of
obtaining a stable reset condition upon power-up. If power supply
power supply voltage rises faster than the RC time constant. The
RC network provides the necessary reset delay to hold the
microprocessor in reset until its circuitry settles down and normal
operation begins. When the supply turns off, the diode provides a
path for the capacitor to discharge to more quickly assert logic LOW
reset.
rises abruptly, the RESET may go “HIGH” momentarily when V is
CC
below the minimum operating voltage (0.85 V). To overcome this
undesirable response, a resistor in placed between positive supply,
V
CC
and V pin and a capacitor from V pin to ground. The RC
CC CC
circuit solution works reasonably well for power-up as long as the
8
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
PACKING METHOD
The NE56631-XX is packed in reels, as shown in Figure 13.
GUARD
BAND
TAPE
TAPE DETAIL
REEL
ASSEMBLY
COVER TAPE
CARRIER TAPE
BARCODE
LABEL
BOX
SL01305
Figure 13. Tape and reel packing method.
9
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
Plastic small outline package; 5 leads; body width 1.6 mm
SOP003
10
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
REVISION HISTORY
Rev
Date
Description
_3
20031014
Product data (9397 750 12125); ECN 853-2328 30315 of 08 September 2003.
Supersedes data of 2003 Feb 14 (9397 750 11131).
Modifications:
• Change package outline version to SOP003 in Ordering information table and Package outline sections.
_2
_1
20030214
20021007
Product data (9397 750 11131); ECN 853-2328 29155 of 06 November 2002.
Supersedes data of 2002 Oct 07 (9397 750 10266).
Product data (9397 750 10266); ECN 853–2328 27919 of 25 March 2002.
11
2003 Oct 14
Philips Semiconductors
Product data
Active-LOW system reset
NE56631-XX
Data sheet status
Product
status
Definitions
[1]
Level
Data sheet status
[2] [3]
I
Objective data
Development
Qualification
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Product data
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
Production
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
http://www.semiconductors.philips.com.
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limitingvaluesdefinition— Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given
in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no
representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be
expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree
to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes in the products—including circuits, standard cells, and/or software—described
or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated
viaaCustomerProduct/ProcessChangeNotification(CPCN).PhilipsSemiconductorsassumesnoresponsibilityorliabilityfortheuseofanyoftheseproducts,conveys
nolicenseortitleunderanypatent, copyright, ormaskworkrighttotheseproducts, andmakesnorepresentationsorwarrantiesthattheseproductsarefreefrompatent,
copyright, or mask work right infringement, unless otherwise specified.
Koninklijke Philips Electronics N.V. 2003
Contact information
All rights reserved. Printed in U.S.A.
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 10-03
9397 750 12125
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number:
Philips
Semiconductors
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