MIC2774N-23BM5 Micrel Semiconductor, MIC2774N-23BM5 Datasheet

MIC2774N-23BM5

Manufacturer Part Number

MIC2774N-23BM5

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC2774N-23BM5.pdf (8 pages)

Specifications of MIC2774N-23BM5

0428

Current page: 1 of 8
Download datasheet (735Kb)

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-23BM5

MIC2774N-23BM5 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

... 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 ...

Related keywords

MIC2774N-23BM5 datasheet
MIC2774N-23BM5 data sheet
MIC2774N-23BM5 pdf datasheet
MIC2774N-23BM5 component
MIC2774N-23BM5 part
MIC2774N-23BM5 distributor
MIC2774N-23BM5 RoHS
MIC2774N-23BM5 datasheet download