SX1502 Ver la hoja de datos (PDF) - Semtech Corporation
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SX1502 Datasheet PDF : 34 Pages
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SX1501/SX1502/SX1503
4/8/16 Channel Low Voltage GPIO
ADVANCED COMMUNICATIONS & SENSING
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
4
1.2 SX1502 8-channel GPIO
5
1.3 SX1503 16-channel GPIO
6
2 ELECTRICAL CHARACTERISTICS............................................................................................... 7
2.1 Absolute Maximum Ratings
7
2.2 Electrical Specifications
7
2.2.1 Increasing I/O Sink and Source Current Capabilities (Boost Mode)
9
3 TYPICAL OPERATING CHARACTERISTICS ............................................................................... 10
3.1 IDDM vs. VDDM
10
3.2 VOL vs. IOL
10
3.3 VOH vs. IOH
11
3.4 ICC1+ICC2 vs. VCC1,2 when Boost Mode is ON
12
4 BLOCK DETAILED DESCRIPTION ............................................................................................. 13
4.1 SX1501 4-channel GPIO
13
4.2 SX1502 8-channel GPIO
13
4.3 SX1503 16-channel GPIO
14
4.4 Reset (NRESET)
14
4.5 2-Wire Interface (I2C)
15
4.5.1 WRITE
15
4.5.2 READ
16
4.5.3 READ - STOP separated format (SX1501 and SX1502 only)
16
4.6 Interrupt (NINT)
17
4.7 Programmable Logic Functions (PLD)
17
4.7.1 SX1501
17
4.7.2 SX1502
18
4.7.3 SX1503
18
4.7.4 Tutorial
18
5 CONFIGURATION REGISTERS.................................................................................................. 20
5.1 SX1501 4-channel GPIO
20
5.2 SX1502 8-channel GPIO
21
5.3 SX1503 16-channel GPIO
23
6 APPLICATION INFORMATION ................................................................................................... 27
6.1 Typical Application Circuit
27
6.2 Typical LED Operation
27
6.2.1 LED ON/OFF Control
27
6.2.2 LED Intensity Control
28
6.3 Keypad Implementation
28
6.4 Level Shifter Implementation Hints
28
Rev 8 – 18th Feb. 2009
2
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