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PDF SX1509B Data sheet ( Hoja de datos )
| Número de pieza | SX1509B | |
| Descripción | Worlds Lowest Voltage Level Shifting GPIO | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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SX1508B/SX1509B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
ADVANCED COMMUNICATIONS & SENSING
SX1508B/SX1509B
World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine
GENERAL DESCRIPTION
The SX1508B and SX1509B are complete ultra low
voltage General Purpose parallel Input/Output (GPIO)
expanders ideal for low power handheld battery
powered equipment. This family of GPIOs comes in
8-, 16-channel configuration and allows easy serial
expansion of I/O through a standard 400kHz 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,
thus eliminating the need for extra level translating
circuits. The core is operating as low as 1.425V while
the dual I/O banks can operate between 1.2V and
3.6V independent of the core voltage and each other
(5.5V tolerant).
The SX1508B and SX1509B 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 bus activity.
The SX1508B and SX1509B 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, interrupt mask and interrupt
registers. These I/O expanders feature small footprint
packages and are rated from -40°C to +85°C
temperature range.
ORDERING INFORMATION
Part Number I/Os Package
SX1508BIULTRT 8 QFN-UT-20
SX1509BIULTRT 16 QFN-UT-28
SX1508BEVK 8 Evaluation Kit
SX1509BEVK 16 Evaluation Kit
Marking
GAA2
GBA3
-
-
KEY PRODUCT FEATURES
• 1.2V to 3.6V Low Operating Voltage with Dual
Independent I/O Rails (VCC1, VCC2)
Enable Direct Level Shifting Between I/O
Banks and Host Controller
• 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
Intensity Control (256-step PWM)
Blink Control (224 On/Off values)
Breathing Control (224 Fade In/Out values)
• On-Chip Keypad Scanning Engine
Support Up to 8x8 Matrix (64 Keys)
Configurable Input Debouncer
• 8/16 Channels of True Bi-directional Style I/O
Programmable Pull-up/Pull-down
Push/Pull or Open-drain outputs
Programmable Polarity
• Open Drain Active Low Interrupt Output (NINT)
Bit Maskable
Programmable Edge Sensitivity
• Built-in Clock Management (Internal 2MHz
Oscillator/External Clock Input, 7 clock values)
OSCIO can be Configured as GPO
• 400kHz I2C Compatible Slave Interface
• 4 User-Selectable I²C Slave Addresses
• 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
TYPICAL APPLICATIONS
• Cell phones, PDAs, MP3 players
• Digital camera, Notebooks, GPS Units
• Any battery powered equipment
Host
Controller
VDDM
1.425 - 3.6V
I2C SX1508B
NINT
NRESET
VCC1
1.2 - 3.6V
IO0
IO1
IO2
IO3
VCC2
1.2 - 3.6V
IO4
IO5
IO6
IO7
LEVEL SHIFTING
FULL LED DRIVE
KEYPAD SCANNING
Rev 4 – 26th April 2011
1
BUTTON CONTROL
www.semtech.com http://www.Datasheet4U.com
1 page  
SX1508B/SX1509B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
ADVANCED COMMUNICATIONS & SENSING
1.2 SX1509B 16-channel I2C GPIO with LED Driver and Keypad Engine
Pin Symbol Type Description
1
I/O[2]
DIO (*1)
I/O[2], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
2
I/O[3]
DIO (*1)
I/O[3], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
3 GND
P Ground Pin
4 VCC1
P Supply voltage for Bank A I/O[7-0]
5
I/O[4]
DIO (*1)
I/O[4], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
6
I/O[5]
DIO (*1)
I/O[5], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
7
I/O[6]
DIO (*1)
I/O[6], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
8
I/O[7]
DIO (*1)
I/O[7], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
9 NINT
DO Active low interrupt output
10 ADDR1
DI Address input bit 1, connect to VDDM or GND
11
OSCIO
DIO (*1) Oscillator input/output, can also be used as GPO
12 VDDM
P Main supply voltage
13
I/O[8]
DIO (*1)
I/O[8], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
14
I/O[9]
DIO (*1)
I/O[9], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
15
I/O[10]
DIO (*1)
I/O[10], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
16
I/O[11]
DIO (*1)
I/O[11], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
17 GND
P Ground Pin
18 VCC2
P Supply voltage for Bank B I/O[15-8]
19
I/O[12]
DIO (*1)
I/O[12], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
20
I/O[13]
DIO (*1)
I/O[13], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
21
I/O[14]
DIO (*1)
I/O[14], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
22
I/O[15]
DIO (*1)
I/O[15], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
23 NRESET
DI Active low reset input
24 SDA
DIO I2C serial data line
25 SCL
DI I2C serial clock line
26 ADDR0
DI Address input bit 0, connect to VDDM or GND
27
I/O[0]
DIO (*1)
I/O[0], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
28
I/O[1]
DIO (*1)
I/O[1], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
(*1) This pin is programmable through the I2C interface
Table 2 – SX1509B Pin Description
I/O[2] 1
I/O[3] 2
GND 3
VCC1 4
I/O[4] 5
I/O[5] 6
I/O[6] 7
TOP VIEW
GND
(PAD)
21 I/O[14]
20 I/O[13]
19 I/O[12]
18 VCC2
17 GND
16 I/O[11]
15 I/O[10]
Rev 4 – 26th April 2011
Figure 2 – SX1509B QFN-UT-28 Pinout
5
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5 Page 
SX1508B/SX1509B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
ADVANCED COMMUNICATIONS & SENSING
4 BLOCK DETAILED DESCRIPTION
4.1 SX1508B 8-channel I2C GPIO with LED Driver and Keypad Engine
OSCIO
Keypad
Engine
16 Keys Max
VDDM
NRESET
SCL
SDA
ADDR1
ADDR0
Reset
Input
Filter
Clock Mgmt
External
Clock
Internal
Oscillator
LED Driver
Intensity (PWM)
Blink (Timer)
Breathe (Ramp)
I2C Bus
Control
I/O Bank A
A
8-Bit
R/W
I/O Bank B
A
SX1508B
Interrupt
VCC1
I/O[0]
I/O[1]
I/O[2]
I/O[3]
VCC2
I/O[4]
I/O[5]
I/O[6]
I/O[7]
NINT
GND
Figure 4 – 8-channel Low Voltage GPIO with LED Driver and Keypad Engine
4.2 SX1509B 16-channel I2C GPIO with LED Driver and Keypad Engine
OSCIO
Keypad
Engine
64 Keys Max
Auto
Sleep/Wakeup
VDDM
NRESET
SCL
SDA
ADDR1
ADDR0
Reset
Input
Filter
Clock Mgmt
External
Clock
Internal
Oscillator
LED Driver
Intensity (PWM)
Blink (Timer)
Breathe (Ramp)
I2C Bus
Control
I/O Bank A
8-Bit A
R/W
8-Bit
R/W
I/O Bank B
A
SX1509B
Interrupt
VCC1
I/O[0]
I/O[1]
I/O[2]
I/O[3]
I/O[4]
I/O[5]
I/O[6]
I/O[7]
VCC2
I/O[8]
I/O[9]
I/O[10]
I/O[11]
I/O[12]
I/O[13]
I/O[14]
I/O[15]
NINT
GND
Figure 5 – 16-channel Low Voltage GPIO with LED Driver and Keypad Engine
Rev 4 – 26th April 2011
11
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SX1509B.PDF ] | |
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