SX1509BULTRT Semtech, SX1509BULTRT Datasheet - Page 35

• Manufacturer Part Number: SX1509BULTRT
• Description: IC GPIO EXPANDER I2C 16CH 28QFN
• Manufacturer: Semtech

Specifications of SX1509BULTRT

• Interface: I²C
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 1.2 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-UTQFN
• Includes: LED driver / Keypad Engine
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SX1509IULTR; SX1509IULTR; SX1509IULTRT

0xXX
0xXX
0xXX
0x6A
0x7D
0x69
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
RegOffX
RegTRiseX
RegTFallX
RegHighInputB
RegHighInputA
RegReset
th
Oct. 2009
Table 14 – SX1509 Configuration Registers Description
0x00
0x00
0x00
0x00
0x00
0x00
7:3
2:0
7:5
4:0
7:5
4:0
7:0
7:0
7:0
OFF Time of IO[X]:
0 : Infinite (Single shot mode, TOff directly controlled by RegData, Cf §4.9.3)
1 - 15 : TOffX = 64 * RegOffX[7:3] * (255/ClkX)
16 - 31 : TOffX = 512 * RegOffX[7:3] * (255/ClkX)
OFF Intensity of IO[X]
- Linear mode : IOffX = 4 x RegOff[2:0]
- Logarithmic mode (fading capable IOs only) : IOffX = f(4 x RegOffX[2:0]) , Cf §4.9.5
Unused
Fade In setting of IO[X]
0 : OFF
1 - 15 : TRiseX = (RegIOnX-(4xRegOffX[2:0])) * RegTRiseX * (255/ClkX)
16 - 31 : TRiseX = 16 * (RegIOnX-(4xRegOffX[2:0])) * RegTRiseX * (255/ClkX)
Unused
Fade Out setting of IO[X]
0 : OFF
1 - 15 : TFallX = (RegIOnX-(4xRegOffX[2:0])) * RegTFallX * (255/ClkX)
16 - 31 : TFallX = 16 * (RegIOnX-(4xRegOffX[2:0])) * RegTFallX * (255/ClkX)
Enables high input mode for each [input-configured] IO
0 : OFF. VIH max = 3.6V and VCCx min = 1.2V
1 : ON. VIH max = 5.5V and VCCx min = 1.65V
Enables high input mode for each [input-configured] IO
0 : OFF. VIH max = 3.6V and VCCx min = 1.2V
1 : ON. VIH max = 5.5V and VCCx min = 1.65V
Software reset register
Writing consecutively 0x12 and 0x34 will reset the device (same as POR).
Always reads 0.
35
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
SX1507/SX1508/SX1509
www.semtech.com