MIC2774N-23YM5TR Micrel Semiconductor, MIC2774N-23YM5TR Datasheet

MIC2774N-23YM5TR

Manufacturer Part Number

MIC2774N-23YM5TR

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC2774L-29BM5TR.pdf (8 pages)

Specifications of MIC2774N-23YM5TR

Date_code

06+

Packing_info

SOT-153

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General Description

The MIC2774 is a dual power supply supervisor that pro-

vides under-voltage monitoring, manual reset capability, and

power-on reset generation in a compact 5-pin SOT package.

Features include two under-voltage detectors, one ﬁ xed and

one adjustable, and a choice of reset outputs. One under-

voltage detector compares V

factory-programmed thresholds are available. The second,

user-adjustable input is compared against a 300mV reference.

This low reference voltage allows monitoring voltages lower

than those supported by previous supervisor ICs.

The reset outputs are asserted at power-on and any time

either voltage drops below the programmed threshold volt-

ages and remains asserted for 140ms (min.) after they

subsequently rise back above the threshold boundaries.

Manual reset functionality can be provided by a switch con-

nected between ground and the /MR input. A wide choice of

voltage thresholds provides for a variety of supply voltages

and tolerances. Hysteresis is included to prevent chattering

due to noise. Typical supply current is a low 3.5µA.

Ordering Information

Notes:

Typical Application

IttyBitty™ is a trademark of Micrel, Inc.

October 2005

Part Number

Standard

MIC2774N-XXBM5

MIC2774H-XXBM5

MIC2774L-XXBM5

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

XX = Voltage options, see table on page 2. Underscore indicates a Pb-Free part.

Marking

UGXX

UHXX

UIXX

(1)

against a ﬁ xed threshold. Ten

Pb-Free

MIC2774N-XXYM5

MIC2774H-XXYM5

MIC2774L-XXYM5

Power_G

CORE

I/O

er_G

er_ ood

2.5V

1.0V

Manual

Reset

eset

ese

Marking

UGXX

UHXX

UIXX

VDD

/MR

MIC2774L-23

(1)

GND

/RST

Active-High. Complementary (RST) -40°C to +85°C

Active-Low. Complementary (/RST) -40°C to +85°C

Features

• Monitors two independent power supplies for under-volt-

• One ﬁ xed and one user adjustable input

• Choice of factory-programmed thresholds

• Adjustable input can monitor supplies as low as 0.3V

• Generates 140ms (minimum) power-on reset pulse

• Manual reset input

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

• Inputs may be pulled above V

• Open-drain output can be pulled above V

• /RST output valid down to 1.2V

• Ultra-low supply current, 3.5µA typical

• Rejects brief input transients

• IttyBitty™ 5-lead SOT-23 package

• Pin compatible upgrade for MAX6306/09/12

Applications

• Monitoring processor ASIC, or FAGA core and I/O volt-

• PDAs, hand-held PCs

• Embedded controllers

• Telecommunications systems

• Power supplies

• Wireless / Cellular systems

• Networking hardware

Open-Drain. Active-Low (/RST)

Dual Micro-Power Low Voltage Supervisor

age conditions

low reset outputs

max.)

ages

MICROPROCESSOR

Reset Output

VCORE

/RESET

VI/O

OCESSOR

OCESSO

GND

MIC2774

-40°C to +85°C

Temperature

(7V abs. max.)

Range

(7V abs

M9999-102605

SOT-23-5

Package

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