MIC2776H-YM5TR Micrel Semiconductor, MIC2776H-YM5TR Datasheet

MIC2776H-YM5TR

Manufacturer Part Number

MIC2776H-YM5TR

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC2776H-YM5TR.pdf (8 pages)

Specifications of MIC2776H-YM5TR

Date_code

06+

Packing_info

SOT-153

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General Description

The MIC2776 is a power supply supervisor which provides

under-voltage monitoring and power-on reset generation in a

compact 5-pin SOT package. Features include an adjustable

under-voltage detector, a delay-generator, a manual reset

input, and a choice of active-high, active-low, or open-drain

active-low reset output. The user-adjustable monitoring input

is compared against a 300mV reference. This low reference

voltage allows monitoring voltages lower than those supported

by previous supervisor ICs.

The reset output is asserted for no less than 140ms at power-

on and any time the input voltage drops below the reference

voltage. It remains asserted for the timeout period after the

input voltage subsequently rises back above the threshold

boundary. A reset can be generated at any time by asserting

the manual reset input, /MR. The reset output will remain ac-

tive at least 140ms after the release of /MR. The /MR input

can also be used to daisy-chain the MIC2776 onto existing

power monitoring circuitry or other supervisors. Hysteresis

is included to prevent chattering due to noise. Typical supply

current is a low 3.0µA.

Typical Application

IttyBitty™ is a trademark of Micrel, Inc.

November 2005

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

Power_Good

CORE

I/O

2.5V

1.0V

Manual

Reset

VDD

/MR

MIC2776L

/RST

GND

Features

• User-adjustable input can monitor supplies as low as

• ±1.5% threshold accuracy

• Separate V

• Generates power-on reset pulse (140ms min.)

• Manual reset input

• Choice of active-high, active-low or open-drain active-

• Inputs can be pulled above V

• Open-drain output can be pulled above V

• Ultra-low supply current, 3.0µA typical

• Rejects brief input transients

• IttyBitty™ SOT-23-5 package

Applications

• Monitoring processor, ASIC, or FPGA core voltage

• Computer systems

• PDAs/Hand-held PCs

• Embedded controllers

• Telecommunications systems

• Power supplies

• Wireless / cellular systems

• Networking hardware

0.3V

low reset output

max.)

Micro-Power Low Voltage Supervisor

MICROPROCESSOR

VCORE

/RESET

VI/O

input

GND

MIC2776

(7V abs. max.)

(7V abs.

MIC2776

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