83CBG-AD4-R [UTC]

Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO4, HALOGEN FREE, SOT-143, 4 PIN;


型号：	83CBG-AD4-R
厂家：	Unisonic Technologies
描述：	Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO4, HALOGEN FREE, SOT-143, 4 PIN 光电二极管
文件：	总6页 (文件大小：133K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

83CXXX

Preliminary

CMOS IC

4-PIN µP VOLTAGE MONITORS

WITH MANUAL RESET INPUT

DESCRIPTION

The UTC 83CXXX is a microprocessor supervisory circuit. It has

an active-low RESET and push-pull outputs. The circuit can assert

a reset signal as long as the V_CCpower supplies voltage dropping

below a preset threshold and it keep the reset signal for at least

140ms when V_CChas risen above the reset threshold. The reset

threshold can be operated with multi-supply voltages.

The UTC 83CXXX provides the circuit with perfect reliability and

low cost through eliminating external components and adjustments

when applied with +5V, +3.3V, +3.0V power supply The UTC

83CXXX also provide a de-bounced manual reset input.

The reset comparator can work despite of fast transients on

V_CC, and the outputs are guaranteed to be in the right logic state

while V_CCis down to 1V.

In applications, the UTC 83CXXX is suitable for computers,

intelligent instruments, controllers, critical microprocessor and

microcomputer power monitors, portable or battery-powered

equipment, automotive.

FEATURES

* +3V, +3.3V, and +5V power-supply voltages

* Full temperature rated

* Supply current: 5µA

* Available in configuration: push-pull RESET output

* 140ms minimum power-on reset pulse width

* Guaranteed reset to V_CC= +1V

* Power supply transient Immunity

* Eliminating external components

* Manual reset input

* Halogen Free

ORDERING INFORMATION

Ordering Number

83CXXXG-AD4- R

Package

SOT-143

Packing

Tape Reel

Note: XXX: Output Voltage, refer to Marking Information.

(1) R: Tape Reel

(2) AD4: SOT-143

(3) G: Halogen Free

83CXXXG-AD4-R

(1) Packing Type

(2) Package Type

(3) Halogen Free

(4) Output Voltage Code

(4) XXX: Refer to Marking Information

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83CXXX

Preliminary

CMOS IC

MARKING INFORMATION

PACKAGE

VOLTAGE CODE

MARKING

B: 2.93V

C: 3.08V

SOT-143

PIN CONFIGURATION

PIN DESCRIPTION

PIN NO

PIN NAME

GND

DESCRIPTION

Ground

RESET output remains low while V_CCis below the reset threshold, and for at least

140ms after V_CCrises above the reset threshold.

RESET

Manual reset input. A logic low on MR asserts reset. Reset remains asserted as

long as MR is low and for at least 140ms after MR returns high, This active-low

input has an internal 20kΩ pull-up resistor. It can be driven from a TTL or

CMOS-logic line, or shorted to ground with a switch. Leave open if unused.

Supply voltage (+5V, +3.3V, +3.0V)

V_CC

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83CXXX

Preliminary

CMOS IC

ABSOLUTE MAXIMUM RATING

PARAMETER

Terminal Voltage (respect to GND)

SYMBOL

V_CC

RATINGS

-0.3 ~ +6.0

-0.3 ~ (V_CC+0.3)

-0.3 ~ +6.0

UNIT

Push-Pull

Open Drain

V_RESET

RESET Voltage

Input Current

I_CC

I_OUT

Output Current (RESET )

Power Dissipation (Ta =+70°C)

Derated Above 70°C

320

mW/°C

°C

P_D

Operating Temperature

T_OPR

T_STG

-40~+105

-65~+150

Storage Temperature Range

°C

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ELECTRICAL CHARACTERISTICS

(V_CC= full range, Ta =-40°C~+105°C. Typical values are at Ta=25°C, unless otherwise specified)

83C293 (2.93V) (V_CC= 3.3V)

PARAMETER

SYMBOL

V_CC

TEST CONDITIONS

Ta=0°C~+70°C

MIN

1.0

TYP

MAX

5.5

UNIT

V_CCRange

Ta=-40°C~+105°C

1.2

5.5

V_IH

V_IL

V_TH

I_CC

I_OL

1.98

V_CC>V_TH(MAX)

MR Input Threshold

0.825

2.988

Reset Threshold

Supply Current

Ta=25°C

2.871

2.93

V_CC<3.6V, Ta=-40°C~+105°C

V_CC=2.5V, V_RESET= 0.5V

μA

Low

RESET Output Current

(push-pull active low)

V_CC= 3.3V, V_RESET= 2.8V

High

I_OH

kΩ

MR Pull-up Resistance

Reset Threshold Tempco

V_CCto Reset Delay

ppm/°C

V_CC= V_TH~(V_TH-100mV)

V_CC= V_TH(MAX)

Reset Active Timeout Period

MR Minima Pulse Width

140

310

520

μs

t_MR

t_MD

100

0.5

MR Glitch Immunity (Note )

MR to Reset Propagation Delay

83C308 (3.08V) (V_CC=3.3V)

PARAMETER

SYMBOL

V_CC

TEST CONDITIONS

Ta=0°C~+70°C

MIN

1.0

TYP

MAX

5.5

UNIT

V_CCRange

Ta=-40°C~+105°C

1.2

5.5

V_IH

V_IL

V_TH

I_CC

I_OL

1.98

V_CC>V_TH(MAX)

MR Input Threshold

0.825

3.141

Reset Threshold

Supply Current

Ta=25°C

3.018

3.08

V_CC<3.6V, Ta=-40°C~+105°C

μA

V_CC=2.5V, V_RESET= 0.5V

Low

RESET Output Current

(push-pull active low)

V_CC= 3.3V, V_RESET= 2.8V

High

I_OH

kΩ

MR Pull-up Resistance

Reset Threshold Tempco

V_CCto Reset Delay

ppm/°C

V_CC= V_TH~ (V_TH-100mV)

V_CC= V_TH(MAX)

Reset Active Timeout Period

MR Minima Pulse Width

140

310

520

μs

t_MR

t_MD

100

0.5

MR Glitch Immunity (Note )

MR to Reset Propagation Delay

Note: “Glitches” of 100ns or less typical values will not generate a reset pulse.

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83CXXX

Preliminary

CMOS IC

DETAILED DESCRIPTION

The UTC 83CXXX have a push-pull output stage. A microprocessor’s (µP’s) reset input initiates the

microprocessor in a known state. The UTC 83CXXX assert a reset signal as long as the V_CCpower supply voltage

drops below a preset threshold. When V_CChas risen over the reset threshold, the devices keep the signal for at least

140ms. They have a function of preventing code-execution errors during power-up, power-down, or brownout

conditions by resetting.

See the manual reset input section if you want to see function that the manual reset input ( MR ) can initiate a

reset.

Manual Reset Input

Many products based on microprocessor need manual reset characteristic, allowing them to initiate a reset.

Reset keeps working while MR is low, and when MR returns high it is for the reset Active Timeout Period (t_RP).

TTL or CMOS-logic levels, or with open-drain / collector outputs both can driveMR .MR will be started by a logic low

on manual reset .Because the input has a build-in 20kΩ pull-up resistor; it can be left open if it is not used. We can

put a 0.1µF capacitor from MR to ground if MR is driven from long cables or the device is used in a noisy

environment strengthening additional noise capacity. Connecting a normally open momentary switch from MR to

ground to create a manual-reset function, and external debounce circuitry is not required.

V_CC

RESET

UTC

83CXXX

R1=

100K

GND

Figure 1. RESET Valid to V_CC= Ground Circuit

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83CXXX

Preliminary

CMOS IC

APPLICATION INFORMATION

1. Ensuring a Valid Reset Output Down to V_CC= 0

The UTC 83CXXX RESET output no more sinks current when V_CCdrops below 1V—it becomes an open

circuit. Therefore, high-impedance CMOS logic input connected to RESET can drift to undetermined voltages. This

presents no problem in most applications since most microprocessors and other circuitry can’t be operated when V_CC

is under 1V. In figure 1, however, in applications where RESET must be valid down to 0V. In order to causes any

stray leakage currents to flow to ground, adding a pull-down resistor toRESET , that holding RESET low. (R1’s

value is not critical and the value 100kΩ is large enough not to load RESET and small enough to pull RESET to

ground).

2. Benefits of Highly Accurate Reset Threshold

Most microprocessor supervisor ICs has reset threshold voltages between 5% and 10% below the value of

nominal supply voltages. If using ICs rated at only the nominal supply ±5%, this leaves an uncertainty zone where

the supply is between 5% and 10% low and where the reset may or may not be asserted.

The UTC 83C308 with high accuracy ensure that the reset is asserted closely to 5% limit and long before the

supply has declined to 10% below nominal.

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83CXXX

Preliminary

CMOS IC

TYPICAL APPLICATION CIRCUIT

V_CC

UTC

83CXXX

µP

RESET

RESET INPUT

GND

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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83CBG-AD4-R [UTC]

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