935269144115 [NXP]

IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5, 1.50 MM, PLASTIC, SOT-23, SOT-25, SO-5, Power Management Circuit;


型号：	935269144115
厂家：	NXP
描述：	IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5, 1.50 MM, PLASTIC, SOT-23, SOT-25, SO-5, Power Management Circuit 光电二极管
文件：	总12页 (文件大小：122K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

INTEGRATED CIRCUITS

SA56614-XX

CMOS system reset

Product data

2002 Sep 13

Supersedes data of 2001 Jun 19

Philips

Semiconductors

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

GENERAL DESCRIPTION

The SA56614-XX is a CMOS device designed to generate a reset

signal for a variety of microprocessor and logic systems. Accurate

reset signals are generated during momentary power interruptions,

or whenever power supply voltages sag to intolerable levels.

Several reset threshold versions of the device are available. A

totem-pole output topology is incorporated to provide both current

source and sink capability to the user.

SA56614-XX is available in the SOT23-5 surface mount package.

FEATURES

APPLICATIONS

• 10 V maximum operating voltage

• Microcomputer systems

• Low operating voltage (0.95 V)

• Totem pole CMOS output

• Logic systems

• Battery monitoring systems

• Back-up power supply circuits

• Voltage detection circuits

• Offered in reset thresholds of

1.85, 2.0, 2.7, 2.8, 2.9, 3.0, 3.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7 V

• Available in SOT23-5 surface mount package

SIMPLIFIED SYSTEM DIAGRAM

NE56614-XX

CPU

OUT

RESET

REF

SL01343

Figure 1. Simplified system diagram.

2002 Sep 13

853–2248 28914

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

ORDERING INFORMATION

PACKAGE

TYPE NUMBER

TEMPERATURE

RANGE

NAME

DESCRIPTION

SA56614-XXGW SOT23-5, SOT25, SO5

plastic small outline package; 5 leads (see dimensional drawing)

–40 to +85 °C

NOTE:

The device has twelve detection voltage options, indicated by the

XX on the ‘Type number’.

185

DETECT VOLTAGE (Typical)

1.85 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

4.7 V

PIN CONFIGURATION

PIN DESCRIPTION

SYMBOL

DESCRIPTION

Reset HIGH output.

OUT

N/C

OUT

Positive supply.

Ground. Negative supply.

No connection.

SA56614-XX

N/C

No connection.

SL01360

Figure 2. Pin configuration.

MAXIMUM RATINGS

SYMBOL

PARAMETER

MIN.

MAX.

UNIT

Power supply voltage

Output voltage

–

OUT

– 0.3

+ 0.3

Output current

–

°C

Operating temperature

Storage temperature

Power dissipation

–40

–

oper

stg

125

150

°C

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

DC ELECTRICAL CHARACTERISTICS

Characteristics measured with T

= 25 °C, unless otherwise specified.

amb

SYMBOL

PARAMETER

CONDITIONS

TEST

CIRCUIT

MIN.

– 2%

TYP.

MAX.

+ 2%

UNIT

Reset detection threshold

Hysteresis

∆V

= 0 V → V + 1.0 V → 0 V

× 0.03

× 0.05

V × 0.08

V /∆T

Threshold voltage temperature

coefficient

–40 °C ≤ T

≤ +85 °C

–

±0.01

–

%/°C

Fig. 16

amb

Supply current

= V + 1.0 V

–

0.25

–

1.0

0.1

µA

leakage current when OFF

= V = 10 V

Fig. 18

N-channel I output sink current 1

= 1.2 V; V = 0.5 V

–0.23

–1.6

0.50

–3.7

–

NDS1

N-channel I output sink current 2

= 0.5 V; V = 2.4 V

NDS2

(for V > 2.6 V)

Fig. 17

N-channel I output sink current 3

= 0.5 V; V = 3.6 V

–3.2

0.36

0.46

0.59

–7.00

0.62

0.75

0.96

–

NDS3

PDS1

PDS2

PDS3

(for V > 3.9 V)

P-channel I output source current 1

= 0.5 V; V = 4.8 V

(for V < 4.0 V)

P-channel I output source current 2

= 0.5 V; V = 6.0 V

(for 4.0 V < V < 5.7 V)

Fig. 18

P-channel I output source current 3

= 0.5 V; V = 8.4 V

(for V ≥ 5.7 V)

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

TYPICAL PERFORMANCE CURVES

0.50

+0.20

+0.15

+0.10

+0.05

= V + 1.0 V

FALLING

NORMALIZED TO 25 °C

0.45

0.40

0.35

NORMALIZED TO 25 °C

0.30

0.25

–0.05

–0.10

–0.15

–0.20

0.20

0.15

0.10

–50

–25

100

125

–50

–25

100

125

T , TEMPERATURE (°C)

amb

T , TEMPERATURE (°C)

amb

SL01344

SL01345

Figure 3. Supply current versus temperature.

Figure 4. Detection threshold versus temperature.

200

150

100

3.0

2.5

= V – V

= 0.5 V

S(HYS)

(V RISING – V FALLING)

2.0

N-CHANNEL

1.5

1.0

0.5

P-CHANNEL

–50

–25

100

125

–50

–25

100

125

T , TEMPERATURE (°C)

amb

T , TEMPERATURE (°C)

amb

SL01346

SL01347

Figure 5. Detection hysteresis versus temperature.

Figure 6. Output FET current versus temperature.

0.6

0.5

0.4

5.0

= 25 °C

AMB

= 25 °C

AMB

TYPICAL CHARACTERISTIC.

DETECTION AND RELEASE

VOLTAGE POINTS DEPEND ON

THE SPECIFIC DEVICE TYPE.

4.0

3.0

2.0

S(HYS)

0.3

0.2

1.0

0.1

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

1.0

2 .0

3.0

4.0

5.0

6.0

, SUPPLY VOLTAGE (V)

SL01348

SL01349

Figure 7. Output voltage versus supply voltage.

Figure 8. Supply current versus supply voltage.

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

+ 2.0 V

AMB

= 25 °C

(SEE FIGURES 10 AND 11)

INPUT SIGNAL

1.2 V

PHL

7.0 V

3.5 V

OUTPUT SIGNAL

PLH

PHL

–5

–4

–3

–2

–1

PLH

C , OUTPUT LOAD CAPACITANCE (µF)

SL01350

SL01351

Figure 9. Propagation delay versus output load C.

Figure 10. Propagation delay measurements.

INPUT

SIGNAL

OUTPUT

SA56614-XX

= 10 pF to 0.1 µF

SL01352

Figure 11. Propagation delay measurement circuit.

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

TECHNICAL DESCRIPTION

The SA56614-XX is a CMOS device designed to monitor the

system’s power source and provide a system reset function in the

event the supply voltage sags below an acceptable level for the

system to reliably operate. The SA56614 generates a compatible

reset signal for a wide variety of microprocessor and logic systems.

The reset threshold incorporates a typical hysteresis of

LOW (below V ) and the output HIGH goes to a HIGH voltage state

when the input is HIGH (above V ).

The low side N-Channel FET (TR ) establishes threshold hysteresis

by turning ON whenever the threshold comparator’s output goes to

a HIGH state (when V sags to or below the threshold level). TR ’s

turning ON causes additional current to flow through resistors R ,

(V × 0.05) volts to prevent erratic resets from being generated.

and R causing the inverting input of the threshold comparator to be

The SA56614 operates at very low supply currents, typically

0.25 µA, while offering a high precision of threshold detection (±2%).

pulled even lower. For the comparator to reverse its output polarity

and turn OFF TR , the V source voltage must overcome this

The output of the SA56614 incorporates an active Totem-Pole

output topology comprised of complimentary P-Channel and

N-Channel FETs. A P-Channel FET is on the high supply side and

additional pull-down voltage present on the comparator’s inverting

input. The differential voltage required to do this establishes the

hysteresis voltage of the sensed threshold voltage. Typically it is

when ON pulls the output to or near the V supply voltage from

(V × 0.05) volts.

which output source current can be obtained. A complimentary

N-Channel FET is on the low or ground side, and actively pulls the

output LOW or to ground with the capability of sinking current into

the output. Both devices supply system reset signals. The user

should keep in mind, when connecting the SA56614 to a system, the

effect of supplying source current from the output of the SA56614 on

the system. This is of particular importance where the SA56614 is

operated from a different supply source than the rest of the system.

When the V voltage sags and is at or below the Detection

Threshold (V ), the device will assert a Reset LOW output at or

very near ground potential. As the V voltage rises from

(V < V ) to V or higher, the reset is released and the output

follows V . Conversely, decreases in V from (V > V ) to V

or lower cause the output to be pulled to ground.

Hysteresis Voltage = Release Voltage – Detection Threshold Voltage

Figure 12 is a functional block diagram of the SA56614. The internal

V = V – V

HYS SH SL

reference source voltage (V

) is typically 0.8 V over the operating

REF

where:

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 resistor divider network

= V + V

V (R + R ) / R

REF 1 2 2

HYS

= V

(R + R + R ) / (R + R )

REF 1 2 3 2 3

made up of R , R , and R . The output of the threshold comparator

drives the totem-pole output stage of the device.

When V drops below the minimum operating voltage, typically

less than 0.95 volts, the output is undefined and output reset low

When the supply voltage sags to the threshold detection voltage, the

resistor divider network supplies a voltage to the inverting input of

assertion is not guaranteed. At this level of V the output will try to

rise to V

the threshold comparator which is less than that of V

, causing

REF

the output of the comparator to adopt a HIGH output state. This

causes the high side P-Channel FET of the Totem-Pole output stage

to turn OFF while simultaneously turning the low side N-Channel

FET from OFF to an active ON state, pulling the output to a LOW

voltage state. The device adheres to a true input/output logic

protocol. The output goes to a LOW voltage state when input is

The V

voltage is typically 0.8 V. The devices are fabricated using

REF

a high resistance CMOS process and utilize high resistance R , R ,

and R values requiring very small amounts of current. This

combination achieves very efficient low power performance over the

full operating temperature.

NE56614-XX

OUT

REF

SL01353

Figure 12. Functional diagram

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

TIMING DIAGRAM

The timing diagram shown in Figure 13 depicts the operation of the

device. Letters A-J on the TIME axis indicate specific events.

D-E: Between ‘D’ and ‘E’, V starts rising.

E: At ‘E’, V rises to the V . Once again, the device releases

A: At ‘A’, V begins to increase. Also the V

voltage initially

the hold on the V

reset. The Reset output V

tracks V as it

OUT DD

OUT

increases but abruptly decreases when V reaches the level

rises above V

(approximately 0.8 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,

causing V

to follow it. As long as V remains above the V

OUT

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

DD 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 DD

OUT

tracks V as it rises above V (assuming the reset pull-up resistor

normal.

is connected to V ). In a microprocessor based system these

H: At event ‘H’ V falls until the V undervoltage detection

events release the reset from the microprocessor, allowing the

microprocessor to function normally.

threshold point is reached. At this level, a RESET signal is

generated and V goes LOW.

OUT

C-D: At ‘C’, V begins to fall, causing V

to follow. V

OUT

J: At ‘J’ the V voltage has decreased until normal internal circuit

continues to fall until the V undervoltage detection threshold is

bias is unable to maintain a V

reset. As a result, V may rise to

OUT

reached at ‘D’. This causes a reset signal to be generated (V

Reset goes LOW).

OUT

less than 0.8 V. As V decreases further, V

reset also

OUT

decreases to zero.

∆V

OUT

TIME

SL01354

Figure 13. Timing diagram.

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

APPLICATION INFORMATION

CURRENT CHANGES

CPU

RESET

OUT

SA56614-XX

SUPPLY

OUTPUT

SA56614-XX

GND

SL01355

SL01356

Figure 14. Conventional reset application

Figure 15. High impedance supply operating problems

Small changes in supply current will occur when the SA56614

asserts or releases a reset. In some cases this can cause

oscillations of the device. This can present a problem, particularly

Significant voltage variations of V may occur when the device is

operated from high impedance power sources. When the device

asserts or releases a reset, V variations are produced as a result

where high impedance V sources are employed. Figure 15 shows

of the voltage drop developed across R due to the current

how this may occur.

variations through the resistor R (representing the supply

impedance). If the V variations are large, such that they exceed

the Detection Hysteresis, the output of the device can oscillate from

a HIGH state to a LOW state. The user should avoid using high

impedance V sources to prevent such situations.

TEST CIRCUITS

SA56614-XX

OUT

SL01357

SL01359

Figure 16. Test Circuit 1

Figure 18. Test Circuit 3

SA56614-XX

OUT

SL01358

Figure 17. Test Circuit 2

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

PACKING METHOD

GUARD

BAND

TAPE

TAPE DETAIL

REEL

ASSEMBLY

COVER TAPE

CARRIER TAPE

BARCODE

LABEL

BOX

SL01305

Figure 19. Tape and reel packing method

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

SOT23-5: plastic small outline package; 5 leads; body width 1.5 mm

1.2

1.0

0.55

0.41

0.22

0.08

3.00

2.70

1.70

1.50

0.55

0.35

0.025

1.35

2002 Sep 13

Philips Semiconductors

Product data

CMOS system reset

SA56614-XX

Data sheet status

Product

status

Definitions

[1]

Data sheet status

[2]

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.

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.

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.

Changes will be communicated according to the Customer Product/Process Change Notification

(CPCN) procedure SNW-SQ-650A.

[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.

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.

Limiting values definition — 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.

Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,standard

cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no

responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these

products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless

otherwise specified.

Koninklijke Philips Electronics N.V. 2002

Contact information

For additional information please visit

http://www.semiconductors.philips.com.

Fax: +31 40 27 24825

Date of release: 09-02

9397 750 10401

For sales offices addresses send e-mail to:

sales.addresses@www.semiconductors.philips.com.

Document order number:

Philips

Semiconductors

2002 Sep 13

935269144115 [NXP]

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