Microsemi Corporation LX7001MY, LX7001ILP, LX7001IDM, LX7001CLP, LX7001CDM Datasheet

LX7001

0

TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT

T HE I NFINITE P OWER OF I NNOVATION

DESCRIPTION

The LX7001 is an improved
undervoltage sensing circuit specifi­cally designed for use as a reset
controller in microprocessor-based
systems. Today's complex miniaturized
systems present difficult challanges to
the system designer such as overcom­ing spurious noise problems. The
LX7001 is optimized for systems that
must be tolerant of high-speed power
supply glitches caused by high-speed
logic transitions and similar switching
phenomena. The LX7001 offers a
unique stage that couples glitch
immunity with a micropower, ultra­stable band-gap reference for preci­sion sensing of undervoltage condi­tions. It offers the designer an

NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.

economical, space-efficient solution
for low supply voltage detection
when used in combination with a
single pull-up resistor. Adding one
capacitor offers the functionality of a
programmable delay time after power
returns. Additionally, the LX7001
offers excellent temperature stability.
A high-quality trimmed voltage
reference and bias circuit permit very
accurate and repeatable undervoltage
sensing. The remaining blocks
consist of a comparator with hyster­esis, high current clamping diode and
open collector output stage capable
of sinking up to 60mA. The
LX7001's RESET output is specified to
be fully functional at VIN=1V.

PRODUCT HIGHLIGHT

INPUT TRANSIENT IMMUNITY

100

P RODUCTION DATA SHEET

KEY FEATURES

■ Fully Characterized, Transient Immune
Input Stage

(See Product Highlight)

■ Monitors 5V Supplies (V

■ Outputs Fully Defined At VCC=1V

■ Ultra-Low Supply Current

(500µA Max. Over Temp)

! Temperature Compensated ICC For Extremely

Stable Current Consumption

! µP Reset Function Programmable With 1

External Resistor And Capacitor

! Comparator Hysteresis Prevents Output

Oscillation

! Electrically Compatible With Motorola

MC34064

! Pin-to-Pin Compatible With Motorola

MC34064/MC34164

APPLICATIONS

■■

■ All Microprocessor Or Microcontroller

■■

Designs Using 5V Supplies

■■

■ Simple 5V Undervoltage Detection

■■

=4.6V Typ.)

TRIP

10

1

) Noise Pulse Width - (µs)

n

(t

0.1
100

IMMUNE

(en) Noise Pulse Amplitude - (mV)

(°C)

T

A

0 to 70 LX7001CDM LX7001CLP —

-40 to 85 LX7001IDM LX7001ILP —

-55 to 125 — — LX7001MY

ACTIVE

100

PACKAGE ORDER INFORMATION

Plastic SOIC

DM

8-pin

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. LX7001CDMT)

Plastic TO-92

LP

3-pin

Ceramic Dip

Y

8-pin

Copyright © 1999
Rev. 1.2 6/99

L INF INITY MICROELECTRONICS INC.

11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: [phone]

1

LX7001

PRODUCT DATABOOK 1996/1997

TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT

P RODUCTION DATA SHEET

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Supply Voltage (VIN) ............................................................................... -1V to 12V

RESET Output Voltage (V
Output Sink Current (I

Clamp Diode Forward Current (IF), Pin 1 to pin 2............................................... 100mA

) .......................................................................... -1V to 12V

OUT

) ............................................................ Internally Limited (mA)

OL

Operating Junction Temperature

Ceramic (Y - Package).......................................................................................... 150°C

Plastic (DM, LP - Packages) .................................................................................. 150°C

Storage Temperature Range ...................................................................... -65°C to 150°C

Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C

Note 1. Values beyond which damage may occur. All voltages are specified with respect to

ground, and all currents are positive into the specified terminal.

THERMAL DATA

DM PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT,

LP PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT,

Y PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT,

Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow

θθ

θ

θθ

JA

θθ

θ

θθ

JA

θθ

θ

θθ

JA

165°C/W

156°C/W

130°C/W

PACKAGE PIN OUTS

1 8

RESET

N.C.

GROUND

RESET

V

N.C.

GROUND

2 7

V

IN

3 6
4 5

Y PACKAGE

(Top View)

IN

DM PACKAGE

(Top View)

LP PACKAGE

(Top View)

18
27
36
45

N.C.
N.C.
N.C.
N.C.

N.C.
N.C.
N.C.
N.C.

3. GROUND

2. V

IN

1. RESET

2

Copyright © 1999

Rev. 1.2 6/99

PRODUCT DATABOOK 1996/1997

TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT

P RODUCTION DATA SHEET

RECOMMENDED OPERATING CONDITIONS (Note 2)

LX7001

Parameter

Input Supply Voltage V
RESET Output Voltage V
Clamp Diode Forward Current I
Operating Ambient Temperature Range:

LX7001C
LX7001I
LX7001M

Note 2. Range over which the device is functional.

Symbol

IN

OUT

F

Recommended Operating Conditions

Min. Typ. Max.

110V

10 V

50mA

070°C

-25 85 °C

-55 125 °C

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, these specifications apply over the operating ambient temperatures of 0°C ≤ TA ≤ 70°C for the LX7001C,

-40°C ≤ TA ≤ 85°C for the LX7001I, and -55°C ≤ TA ≤ 125°C for the LX7001M. Low duty cycle pulse testing techniques are used which maintains
junction and case temperatures equal to the ambient temperature.)

Parameter

Symbol

Test Conditions Units

LX7001C/7001I/7001M

Min. Typ. Max.

Comparator Section

Threshold Voltage

High State Output V
Low State Output V
Hysteresis V

VIN Increasing — 4V to 5V

T+

VIN Decreasing — 5V to 4V

T­H

4.5 4.62 4.7 V

4.5 4.60 4.7 V

0.01 0.02 0.05 V

RESET Output Section

Output Sink Saturation Voltage VIN = 4.0V, IOL = 8.0mA

V

Output Sink Current I
Output Off-State Leakage I

Clamp Diode Forward Voltage VFPin 1 to pin 2, IF = 10mA

OL
OHVOUT

= 4.0V, IOL = 2.0mA

OLVIN

VIN = 1.0V, IOL = 0.1mA
V

= 4.0V

OUT

= 5.0V

V

= 10V

OUT

0.06 1.0 V

0.25 0.4 V

0.3 0.1 V

10 40 60 mA

0.01 0.5 µA

0.02 2.0 µA

0.6 0.82 1.2 V

Total Device

Supply Current I

CC

VIN = 5.0V

345 500 µA

Units

Copyright © 1999
Rev. 1.2 6/99

3