5.5 Electrical Characteristics

Unless otherwise noted, VDD = 5.5V. Typical values and limits apply for TJ = 25°C. Minimum and maximum limits apply over

the entire junction temperature range for operation, TJ = −40°C to +125°C.(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

POWER SUPPLY

VDD

Supply voltage

2.3

5

5.5

V

IQ

Supply current

No load

350

550

µA

Standby

2

5

ΔIQ

Additional standby current

VDD = 5.5V, every LED pin at

4.3V

2

mA

VPOR

Power-On Reset voltage

1.8

1.96

V

tw

Reset pulse width

10

ns

LED

VIL

Low level input voltage

−0.5

0.8

V

VIH

High level input voltage

2

5.5

V

IOL

Low level output current(2)

VOL = 0.4V, VDD = 2.3V

9

mA

VOL = 0.4V, VDD = 3V

12

VOL = 0.4V, VDD = 5V

15

VOL = 0.7V, VDD = 2.3V

15

VOL = 0.7V, VDD = 3V

20

VOL = 0.7V, VDD = 5V

25

ILEAK

Input leakage current

VDD = 3.6V, VIN = 0V or VDD

−1

1

µA

CI/O

Input/output capacitance

See(3)

2.6

5

pF

ALL DIGITAL PINS (EXCEPT SCL AND SDA PINS)

VIL

LOW level input voltage

−0.5

0.8

V

VIH

HIGH level input voltage

2

5.5

V

ILEAK

Input leakage current

−1

1

µA

CIN

Input capacitance

VIN = 0V(3)

2.3

5

pF

I2C INTERFACE (SCL AND SDA PINS)

VIL

LOW level input voltage

–0.5

0.3VDD

V

VIH

HIGH level input voltage

0.7VDD

5.5

V

VOL

LOW level output voltage

0

0.2VDD

V

IOL

LOW level output current

VOL = 0.4V

3

6.5

mA

IQ_SCL/SDA

SCL/SDA to VDD capable

current

100

µA

ƒCLK

Clock frequency

400

kHz

(1)

Limits are ensured. All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C. All hot

and cold limits are ensured by correlating the electrical characteristics to process and temperature variations and applying statistical

process control.

(2)

Each LED pin must not exceed 25 mA and each octal (LED0–LED7; LED8–LED15) must not exceed 100 mA. The package must not

exceed a total of 200 mA.

(3)

Verified by design.

LP3943

SNVS256E – NOVEMBER 2003 – REVISED OCTOBER 2024

www.ti.com

6

Submit Document Feedback

Copyright © 2025 Texas Instruments Incorporated

Product Folder Links: LP3943