SX1504I087TRT Semtech, SX1504I087TRT Datasheet - Page 13

• Manufacturer Part Number: SX1504I087TRT
• Description: IC GPIO EXPANDER I2C 4CH 20QFN
• Manufacturer: Semtech

Specifications of SX1504I087TRT

• Interface: I²C
• Number Of I /o: 4
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SX1504I087TR

ADVANCED COMMUNICATIONS & SENSING
4.3
4.4
The SX1504, SX1505 and SX1506 generate their own power on reset signal after a power supply is connected
to the VDDM pin. The reset signal is made available for the user at the pin NRESET. The rising edge of the
NRESET indicates that the startup sequence of the SX1504, SX1505 or SX1506 has finished. NRESET must be
connected to VDDM (or greater) either directly, or via a resistor.
Rev 2 – 30
1. Device behavior is undefined until VDDM rises above VPOR, at which point NRESET is driven to GND
2. After t
NRESET
SX1506 16-channel GPIO
Reset (NRESET)
by the SX1504, SX1505 or SX1506.
pulled high by an external resistor.
VDDM
SDA
SCL
th
NRESET
August 2010
VDDM
RESET
VDROPH
VDROPL
VPOR
Undefined
, NRESET is released (high-impedance) by the SX1504, SX1505 or SX1506 to allow it to be
1
Reset
Input
Filter
t
RESET
Figure 7 – Power-On / Brown-out Reset Conditions
2
Figure 6 – SX1506 Block Diagram
3
t
PULSE
SX1506
I
Control
2
4
C Bus
GND
13
5
Undefined
R/W
8-Bit
R/W
8-Bit
6
Undefined
I/O Bank A
A
I/O Bank B
A
SX1504/SX1505/SX1506
Interrupt
4/8/16 Channel GPIO
1
t
RESET
www.semtech.com
2
VCC1
I/O[0]
I/O[1]
VCC2
NINT
I/O[2]
I/O[3]
I/O[4]
I/O[5]
I/O[6]
I/O[7]
I/O[8]
I/O[9]
I/O[10]
I/O[11]
I/O[12]
I/O[13]
I/O[14]
I/O[15]