sx1511b Semtech Corporation, sx1511b Datasheet

sx1511b

Manufacturer Part Number

sx1511b

Description

World??s Lowest Voltage Level Shifting Gpio With Driver Keypad Engine

Manufacturer

Semtech Corporation

Datasheet

1.SX1511B.pdf (43 pages)

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ADVANCED COMMUNICATIONS & SENSING

SX1510B/SX1511B/SX1512B

World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine

The SX1510B, SX1511B and SX1512B are complete

ultra

Input/Output (GPIO) expanders ideal for low power

handheld battery powered equipment. This family of

GPIOs comes in 4-, 8-, 16-channel configuration and

allows easy serial expansion of I/O through a

standard SPI interface. GPIO devices can provide

additional

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,

thus eliminating the need for extra level translating

circuits. The core is operating as low as 1.2V

(SX1510B) while the dual I/O banks can operate

between 1.2V and 5.5V (SX1510B) independent of

the core voltage and each other (5.5V tolerant).

The SX1510B, SX1511B and SX1512B feature a fully

programmable LED Driver with internal oscillator for

enhanced lighting control such as intensity (via 256-

step PWM), blinking and breathing (fade in/out) make

them highly versatile for a wide range of LED

applications.

In addition, keypad applications are also supported

with an on-chip scanning engine that enables

continuous keypad monitoring up to 64 keys without

any additional host interaction reducing the bus

activity.

The SX1510B, SX1511B and SX1512B have the

ability to generate mask-programmable interrupts

based on a falling/rising edge of any of its GPIO lines.

A dedicated pin (NINT) indicates to a host controller

that a state change occurred on one or more of the

lines. Each GPIO is programmable via a bank of 8-bit

configuration registers that include data, direction,

pull-up/pull-down,

registers. These I/O expanders feature small footprint

packages and are rated from -40° C to +85° C

temperature range.

(1)

Rev 3 – 9

SX1511BIULTRT

SX1512BIULTRT

Future product

ENERAL

RDERING

SX1510BXXX

SX1512BEVK

Part Number

low

Sept. 2010

control

ESCRIPTION

NFORMATION

voltage

(1)

interrupt

I/Os

and

General

Evaluation Kit

monitoring

QFN-UT-14

QFN-UT-20

QFN-UT-28

Package

mask

Purpose

and

when

Marking

interrupt

KA25

JKA5

parallel

the

YPICAL

World’s Lowest Voltage Level Shifting GPIO

1.2V to 5.5V (SX1510B) Low Operating

Voltage with Dual

(VCC1, VCC2)

5.5V Tolerant I/Os, Up to 15mA Output Sink on

All I/Os (No Total Sink Current Limit)

Integrated LED Driver for Enhanced Lighting

On-Chip Keypad Scanning Engine

4/8/16 Channels of True Bi-directional Style I/O

Open Drain Active Low Interrupt Output (NINT)

Built-in Clock Management (Internal 2MHz

Oscillator/External Clock Input, 7 clock values)

SPI Compatible Slave Interface (up to 20MHz)

Power-On Reset and Reset Input (NRESET)

Ultra Low Current Consumption: 1uA Typ

-40° C to +85° C Operating Temperature Range

Up to 2kV HBM ESD Protection

Small Footprint Packages

Pb & Halogen Free, RoHS/WEEE compliant

Cell phones, PDAs, MP3 players

Digital camera, Notebooks, GPS Units

Any battery powered equipment

Controller

Host

RODUCT

SX1510B/SX1511B/SX1512B

Enable Direct Level Shifting Between I/O

Intensity Control (256-step PWM)

Blink Control (224 On/Off values)

Breathing Control (224 Fade In/Out values)

Support Up to 8x8 Matrix (64 Keys)

Configurable Input Debouncer

Programmable Pull-up/Pull-down

Push/Pull or Open-drain outputs

Programmable Polarity

Bit Maskable

Programmable Edge Sensitivity

OSCIO can be Configured as GPO

Banks and Host Controller

PPLICATIONS

with LED Driver and Keypad Engine

1.425 - 3.6V

NRESET

VDDM

NINT

SPI

EATURES

SX1511B

Independent I/O Rails

www.semtech.com

1.2 - 3.6V

VCC1

VCC2

IO0

IO1

IO2

IO3

IO4

IO5

IO6

IO7

KEYPAD SCANNING

BUTTON CONTROL

LEVEL SHIFTING

FULL LED DRIVE

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