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Semtech Corporation

SX1501 Datasheet Preview

SX1501 Datasheet

4 Channel Low Voltage GPIO

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WIRELESS & SENSING
SX1501/SX1502/SX1503
4/8/16 Channel Low Voltage GPIO
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. 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
SX1502EVK(1)
8 Evaluation Kit
(1)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 package
(SX1501/SX1502)
Ultra-Thin 4x4mm QFN-UT-28 package
(SX1503)
TYPICAL APPLICATIONS
Cell phones, PDAs, MP3 players
Digital camera
Portable multimedia player
Notebooks
GPS Units
Industrial, ATE
Any battery powered equipment
Rev 11 – 16th May 2012
1
www.semtech.com




Semtech Corporation

SX1501 Datasheet Preview

SX1501 Datasheet

4 Channel Low Voltage GPIO

No Preview Available !

WIRELESS & SENSING
SX1501/SX1502/SX1503
4/8/16 Channel Low Voltage GPIO
Table of Contents
GENERAL DESCRIPTION ..................................................................................................................... 1
ORDERING INFORMATION................................................................................................................... 1
KEY PRODUCT FEATURES.................................................................................................................. 1
TYPICAL APPLICATIONS ..................................................................................................................... 1
1 PIN DESCRIPTION ...................................................................................................................... 4
1.1 SX1501 4-channel GPIO
1.2 SX1502 8-channel GPIO
1.3 SX1503 16-channel GPIO
4
5
6
2 ELECTRICAL CHARACTERISTICS............................................................................................... 7
2.1 Absolute Maximum Ratings
2.2 Electrical Specifications
2.2.1 Increasing I/O Sink and Source Current Capabilities (Boost Mode)
7
7
9
3 TYPICAL OPERATING CHARACTERISTICS ............................................................................... 10
3.1 IDDM vs. VDDM
3.2 VOL vs. IOL
3.3 VOH vs. IOH
3.4 ICC1+ICC2 vs. VCC1,2 when Boost Mode is ON
10
10
11
12
4 BLOCK DETAILED DESCRIPTION ............................................................................................. 13
4.1 SX1501 4-channel GPIO
4.2 SX1502 8-channel GPIO
4.3 SX1503 16-channel GPIO
4.4 Reset (NRESET)
4.5 2-Wire Interface (I2C)
4.5.1 WRITE
4.5.2 READ
4.5.3 READ - STOP separated format (SX1501 and SX1502 only)
4.6 Interrupt (NINT)
4.7 Programmable Logic Functions (PLD)
4.7.1 SX1501
4.7.2 SX1502
4.7.3 SX1503
4.7.4 Tutorial
13
13
14
14
15
15
16
16
17
17
17
18
18
19
5 CONFIGURATION REGISTERS.................................................................................................. 20
5.1 SX1501 4-channel GPIO
5.2 SX1502 8-channel GPIO
5.3 SX1503 16-channel GPIO
20
21
23
6 APPLICATION INFORMATION ................................................................................................... 27
6.1 Typical Application Circuit
6.2 Typical LED Operation
6.2.1 LED ON/OFF Control
6.2.2 LED Intensity Control
6.3 Keypad Implementation
6.4 Level Shifter Implementation Hints
Rev 11 – 16th May 2012
2
27
27
27
28
28
28
www.semtech.com


Part Number SX1501
Description 4 Channel Low Voltage GPIO
Maker Semtech Corporation
Total Page 30 Pages
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