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SX1502I088TRT

4/8/16 Channel Low Voltage GPIO with NINT and NRESET

Semtech Corporation 

SX1501/SX1502/SX1503

4/8/16 Channel Low Voltage GPIO

ADVANCED COMMUNICATIONS & SENSING

SX1501/SX1502/SX1503

4/8/16 Channel Low Voltage GPIO with NINT and NRESET

GENERAL DESCRIPTION

The SX1501, SX1502 and SX1503 are complete ultra

low voltage General Purpose parallel Input/Output

(GPIO) expanders ideal for low power handheld

battery powered equipment. They allow easy serial

expansion of I/O through a standard I2C interface.

GPIO devices can provide additional control and

monitoring when the microcontroller or chipset has

insufficient I/O ports, or in systems where serial

communication and control from a remote location is

advantageous.

These devices can also act as a level shifter to

connect a microcontroller running at one voltage level

to a component running at a different voltage level.

The core is operating as low as 1.2V while the I/O

banks can operate between 1.2V and 5.5V

independent of the core voltage and each other.

Each GPIO is programmable via 8-bit configuration

registers. Data registers, direction registers, pull-

up/pull-down registers, interrupt mask registers and

interrupt registers allow the system master to

program and configure 4 or 8 or 16-GPIOs using a

standard 400kHz I2C interface.

The SX1501, SX1502 and SX1503 offer a unique

fully programmable logic functions like a PLD to give

more flexibility and reduce external logic gates used

for standard applications.

The SX1501, SX1502 and SX1503 have the ability to

generate mask-programmable interrupts based on

falling/rising edge of any of its GPIO lines. A

dedicated pin indicates to a host controller that a

state change occurred in one or more of the GPIO

lines.

The SX1501, SX1502 and SX1503 each come in a

small QFN-UT-20/28 package as well as a TSSOP-

20/28 package. All devices are rated from -40°C to

+85°C temperature range.

ORDERING INFORMATION

Part Number I/O Channels Package

SX1501I087TRT

4

QFN-UT-20

SX1502I087TRT

8

QFN-UT-20

SX1503I091TRT

16

QFN-UT-28

SX1501I088TRT(1)

4

TSSOP-20

SX1502I088TRT(1)

8

TSSOP-20

SX1503I089TRT(1)

16

TSSOP-28

SX1502EVK(2)

8

Evaluation Kit

(1)Future products

(2)SX1502I087TRT based, unique evaluation kit for the three parts.

KEY PRODUCT FEATURES

• 4/8/16 channel of I/Os

True bi-directional style I/O

Programmable Pull-up/Pull-down

Push/Pull outputs

• 1.2V to 5.5V independent operating voltage for

all supply rails (VDDM, VCC1, VCC2)

• 5.5V compatible I/Os, up to 24mA output sink

(no total sink current limit)

• Fully programmable logic functions (PLD)

• 400kHz 2-wire I2C compatible slave interface

• Open drain active low interrupt output (NINT)

Bit maskable

Programmable edge sensitivity

• Power-On Reset and reset input (NRESET)

• Ultra low current consumption of typ. 1uA

• -40°C to +85°C operating temperature range

• Ultra-Thin 3x3mm QFN-UT-20 and TSSOP-20

packages (SX1501/SX1502)

• Ultra-Thin 4x4mm QFN-UT-28 and TSSOP-28

packages (SX1503)

TYPICAL APPLICATIONS

• Cell phones, PDAs, MP3 players

• Digital camera

• Portable multimedia player

• Notebooks

• GPS Units

• Industrial, ATE

• Any battery powered equipment

Rev 8 – 18th Feb. 2009

1

www.semtech.com

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