MIC2774L-22BM5 TR Micrel Inc, MIC2774L-22BM5 TR Datasheet

MIC2774L-22BM5 TR

Manufacturer Part Number

MIC2774L-22BM5 TR

Description

IC SUPERVISOR DUAL LV SOT23-5

Manufacturer

Micrel Inc

Type

Multi-Voltage Supervisorr

Datasheet

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

Specifications of MIC2774L-22BM5 TR

Number Of Voltages Monitored

Output

Complementary

Reset

Active Low

Reset Timeout

140 ms Minimum

Voltage - Threshold

2.25V, Adj

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

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

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Other names

MIC2774L-22BM5TR
MIC2774L-22BM5TR

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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 MIC2774L-22BM5 TR

MIC2774L-22BM5 TR Summary of contents

Page 1

... Wireless / Cellular systems • Networking hardware Marking (1) UGXX Open-Drain. Active-Low (/RST) (1) UHXX Active-High. Complementary (RST) -40°C to +85°C (1) UIXX Active-Low. Complementary (/RST) -40°C to +85°C V 1.0V CORE V 2.5V MIC2774L-23 I/O R1 /RST /RST VDD VDD IN R2 er_ ood er_G /MR /MR GND GND Manual Reset ...

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

... TOTAL TOTAL TOTAL TOTAL Application Example Figure 1 below illustrates a hypothetical MIC2774L-23 ap- plication in which the MIC2774L-23 is used to monitor the core and I/O supplies of a high-performance CPU or DSP. The core supply the example is 1.0V ±5%. The CORE main power rail and I/O voltage, V ...

Page 7

... In this situation, circuits driven by /RST could be allowed to ﬂ oat, causing undesired operation. (In most cases, however expected that the circuits driven by the MIC2774L will be similarly inoperative given application requires that /RST be valid below V ...

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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