935269168115 [NXP]

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


型号：	935269168115
厂家：	NXP
描述：	IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5, PLASTIC, SOT-23, SO-5, Power Management Circuit 光电二极管
文件：	总12页 (文件大小：138K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

INTEGRATED CIRCUITS

SA56606-XX

CMOS system reset

Product data

2001 Jun 19

Supersedes data of 2001 Apr 24

File under Integrated Circuits, Standard Analog

Philips

Semiconductors

Philips Semiconductors

Product data

CMOS system reset

SA56606-XX

GENERAL DESCRIPTION

The SA56606-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. An

Open Drain output topology is incorporated for adaptability to a wide

variety of logic and microprocessor applications. Several reset

threshold versions of the device are available.

The SA56606-XX is available in the SOT23-5 surface mount

package.

FEATURES

APPLICATIONS

• Microcomputer systems

• 12 V maximum operating voltage

• Logic systems

• CMOS N-channel Open Drain output

• Offered in reset thresholds of

• Battery monitoring systems

• Back-up power supply circuits

• Voltage detection circuits

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

SA56606-XX

CPU

OUT

RESET

REF

SL01313

Figure 1. Simplified system diagram.

2001 Jun 19

885–2247 26559

Philips Semiconductors

Product data

CMOS system reset

SA56606-XX

ORDERING INFORMATION

PACKAGE

TYPE NUMBER

TEMPERATURE

RANGE

NAME

DESCRIPTION

SA56606-XXGW SOT23-5, SOT25, SO5

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

–40 to +85 °C

NOTE:

Part number marking

The device has twelve detection voltage options, indicated by the

XX on the order code.

Each package is marked with a four letter code. The first three

letters designate the product. The fourth letter, represented by ‘x’, is

a date tracking code. For example, AAKB is device AAK (the

SA56606-30 reset), produced in time period ‘B’.

DETECT VOLTAGE (Typical)

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

Part number

SA56606-20

SA56606-27

SA56606-28

SA56606-29

SA56606-30

SA56606-31

SA56606-42

SA56606-43

SA56606-44

SA56606-45

SA56606-46

SA56606-47

Marking

A A F x

A A G x

A A H x

A A J x

A A K x

A A L x

A A M x

A A N x

A A P x

A A R x

A A S x

A A T x

PIN CONFIGURATION

PIN DESCRIPTION

SYMBOL

DESCRIPTION

OUT

Reset High Output

Positive Supply

N/C

OUT

Ground. Negative Supply

No connection

SA56606-XX

N/C

No connection

SL01312

Figure 2. Pin configuration.

MAXIMUM RATINGS

SYMBOL

PARAMETER

MIN.

–0.3

–

MAX.

UNIT

Power supply voltage

Output voltage

OUT

– 0.3

Output current

–

°C

Operating temperature

Storage temperature

Power dissipation

–40

–

oper

stg

125

150

°C

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-XX

DC ELECTRICAL CHARACTERISTICS

Characteristics measured with T

= 25 °C, unless otherwise specified.

amb

TEST

CIRCUIT

SYMBOL

PARAMETER

CONDITIONS

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. 17

amb

Supply current

= V + 1.0 V

–

0.25

–

1.0

0.1

–

µA

leakage current when OFF

= V = 10 V

N-channel I output sink current 1

= 0.5 V; V = 1.2 V

–0.23

–1.6

–1.4

–8.3

DS1

DS2

N-channel I output sink current 2

= 0.5 V; V = 2.4 V

–

Fig. 18

(for V > 2.6 V)

N-channel I output sink current 3

= 0.5 V; V = 3.6 V

–3.2

–14.7

–

DS3

(for V > 3.9 V)

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-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.

3.0

2.5

200

150

100

= 0.5 V

= V – V

SH SL

S(HYS)

(V RISING – V FALLING)

2.0

1.5

1.0

0.5

N-CHANNEL

–50

–25

100

125

–25

100

125

T , TEMPERATURE (°C)

amb

T , AMBIENT TEMPERATURE (°C)

amb

SL01346

SL01317

Figure 6. Output FET current versus temperature.

Figure 5. Detection hysteresis 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

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-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

7.0 V

= 100 kΩ

INPUT

SIGNAL

OUTPUT

SA56606-XX

= 10 pF to 0.1 µF

SL01322

Figure 11. Propagation delay measurement circuit

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-XX

TECHNICAL DESCRIPTION

The SA56606-XX is a CMOS device designed to provide power

source monitoring and a system reset function in the event the

supply voltage sags below an acceptable level for the system to

reliably operate. The device is designed to generate a compatible

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

The SA56606 can operate at voltages up to 12 volts. The series

includes several versions providing precision threshold voltage reset

values of 2.0, 2.7, 2.8, 2.9, 3.0, 3.1, 4.2, 4.6 and 4.7 V. The reset

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 and

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

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

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

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

threshold incorporates a typical hysteresis of (V × 0.05) volts to

prevent erratic resets from being generated.

(V × 0.05) volts.

The output of the SA56606 utilizes a low side open drain topology,

which requires an external pull-up resistor (R ) to the V power

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

source. Although this may be regarded as a disadvantage, it is an

advantage in many sensitive applications because the open drain

output cannot source reset current to a microprocessor when both

are operated from a common supply. For this reason the SA56606

offers a safe inter-connect to a wide variety of microprocessors.

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.

The SA56606 operates at very low supply currents, typically

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

Figure 12 is a functional block diagram of the SA56606. The internal

Hysteresis Voltage = Release Voltage – Detection Threshold Voltage

HYS

= V – V

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

(R + R ) / R

HYS

REF 1 2 2

= 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

When V drops to levels below the minimum operating voltage,

typically less than 0.95 volts, the output is undefined and output

drives the output Open Drain N-Channel FET of the device TR ).

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

resistor divider network supplies a voltage to the inverting input of

reset LOW 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 go to a HIGH output state. This

causes the low side N-Channel FET to be active ON, pulling its

drain voltage to a LOW state. The device adheres to a true

input/output logic protocol: the output goes LOW when input is LOW

(below threshold) and output goes HIGH when input is HIGH (above

threshold).

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.

SA56606-XX

OUT

REF

SL01323

Figure 12. Functional diagram.

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-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.

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-XX

Application information

SUPPLY

CURRENT CHANGES

CPU

RESET

OUT

SA56606-XX

SUPPLY

OUTPUT

SA56606-XX

GND

SL01371

SL01373

Figure 16. High impedance supply operating problems.

Figure 14. Conventional reset application.

Significant voltage variations of V may occur when the device is

operated from high impedance power sources. When the device

The Power ON Reset Circuit shown in Figure 15 is an example of

how to obtain a stable reset condition upon power-up. If the power

supply voltage rises abruptly, the RESET may go HIGH momentarily

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

of the voltage drop developed across R due to the current

when V is below the minimum operating voltage (0.95 V). To

variations through the resistor R (representing the supply

overcome this, a resistor (R) is placed between positive supply and

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

the V pin with a capacitor from the V pin to ground.

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.

SUPPLY

CPU

RESET

SA56606-XX

OUT

GND

SL01372

Figure 15. Power ON reset circuit.

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-XX

Test circuits

100 kΩ

SA56606-XX

OUT

SL01374

SL01375

Figure 17. Test circuit 1.

Figure 18. Test circuit 2.

PACKING METHOD

The SA56606-XX is packed in reels, as shown in Figure 19.

GUARD

BAND

TAPE

TAPE DETAIL

REEL

ASSEMBLY

COVER TAPE

CARRIER TAPE

BARCODE

LABEL

BOX

SL01305

Figure 19. Tape and reel packing method

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-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

2001 Jun 19

Philips Semiconductors

Product data

CMOS system reset

SA56606-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

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.

Product data

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 datasheet 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 134). 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.

Philips Semiconductors

811 East Arques Avenue

P.O. Box 3409

Sunnyvale, California 94088–3409

Telephone 800-234-7381

Date of release: 06-01

Document order number:

9397 750 08451

Philips

Semiconductors

2001 Jun 19

935269168115 [NXP]

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