MIC2774N-29YM5 TR Micrel Inc, MIC2774N-29YM5 TR Datasheet

MIC2774N-29YM5 TR

Manufacturer Part Number

MIC2774N-29YM5 TR

Description

Dual Ultra-Low-V Supervisor

Manufacturer

Micrel Inc

Type

Multi-Voltage Supervisorr

Datasheet

1.MIC2774N-31YM5_TR.pdf (8 pages)

Specifications of MIC2774N-29YM5 TR

Open-drain

Manual Reset, SOT23-9 -

Number Of Voltages Monitored

Output

Open Drain or Open Collector

Reset

Active Low

Reset Timeout

140 ms Minimum

Voltage - Threshold

2.93V, Adj

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

SOT-23-5, SC-74A, SOT-25

Voltage Supervisor Type

Voltage Monitor

Number Of Voltage Supervisors

Monitored Supervisor Voltage

2.93

Reset Threshold Voltage (min)

2.886V

Operating Supply Voltage (min)

1.5V

Operating Supply Voltage (max)

5.5V

Package Type

SOT-23

Operating Temperature Classification

Industrial

Operating Temp Range

-40C to 85C

Pin Count

Mounting

Surface Mount

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Compliant, Lead free / RoHS Compliant

Other names

576-1101-2

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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

Related parts for MIC2774N-29YM5 TR

MIC2774N-29YM5 TR Summary of contents

Page 1

... Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5µA. Ordering Information Part Number Standard Marking Pb-Free (1) MIC2774N-XXBM5 UGXX MIC2774N-XXYM5 (1) MIC2774H-XXBM5 UHXX MIC2774H-XXYM5 (1) MIC2774L-XXBM5 UIXX MIC2774L-XXYM5 Notes Voltage options, see table on page 2. Underscore indicates a Pb-Free part. ...

Page 2

... Pin Conﬁ guration /MR GND RST VDD SOT-23-5 (M5) “H” Version Pin Description Pin Number Pin Number Pin Number Pin Number Pin Number Pin Number Pin Number Pin Number Pin Number Pin Number MIC2774H MIC2774H MIC2774H MIC2774L MIC2774L MIC2774L MIC2774N MIC2774N MIC2774N ...

Page 3

Absolute Maximum Ratings Supply Voltage (V ) .......................................–0.3V to +7V DD Input Voltages ( ...............................–0.3V to +7V IN /MR Output Voltages ( .........................–0.3V to +7V /RST RST RST, (/RST) Current ................................................... 20mA Storage Temperature ...

Page 4

Timing Diagram /MR / /RST /RST V (ACTIVE LOW RST V (ACTIVE HIGH) OL M9999-102605 ...

Page 5

Functional Diagram /MR * Pinout andpolarity vary by device type. See ordering inf ing rmation tabl e ing inf Functional Description IN, Under-Voltage Detector Input The voltage present at ...

Page 6

Application Information Programming the Voltage Threshold Referring to the “Typical Application Circuit”, the voltage threshold on the IN pin is calculated as follows ...

Page 7

... Interfacing to Processors With Bidirectional Reset Pins Some microprocessors have reset signal pins that are bi- directional, rather than input only. The Motorola 68HC11 family is one example. Because the MIC2774N’s output is open-drain, it can be connected directly to the processor’s reset pin using only the pull-up resistor normally required. ...

Page 8

... Package Information MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and speciﬁ cations at any time without notiﬁ cation to the customer. ...

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