参数资料
型号: SX1503I091TRT
厂商: Semtech
文件页数: 6/32页
文件大小: 0K
描述: IC GPIO EXPANDER I2C 16CH 28-QFN
产品培训模块: Low Voltage GPIO Expander Family
标准包装: 1
接口: I²C
输入/输出数: 16
中断输出:
频率 - 时钟: 400kHz
电源电压: 1.2 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-UFQFN 裸露焊盘
供应商设备封装: 28-QFN(4x4)
包装: 标准包装
产品目录页面: 1359 (CN2011-ZH PDF)
其它名称: SX1503I091DKR
WIRELESS & SENSING
Rev 11 – 16
th May 2012
www.semtech.com
14
SX1501/SX1502/SX1503
4/8/16 Channel Low Voltage GPIO
4.3
SX1503 16-channel GPIO
I
2C Bus
Control
VCC1
Input
Filter
Reset
VDDM
NRESET
SCL
SDA
Interrupt
8-Bit
R/W
I/O[0]
I/O[1]
I/O[2]
I/O[3]
I/O[4]
I/O[5]
I/O[6]
I/O[7]
GND
VCC2
I/O Bank A
A
I/O Bank B
A
SX1503
I/O[8]
I/O[9]
I/O[10]
I/O[11]
I/O[12]
I/O[13]
I/O[14]
I/O[15]
8-Bit
R/W
NINT
Figure 6 – 16-channel Low Voltage GPIO
4.4
Reset (NRESET)
The SX1501, SX1502 and SX1503 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 SX1501, SX1502 or SX1503 has finished. NRESET must be
connected to VDDM (or greater) either directly, or via a resistor.
Undefined
t
RESET
NRESET
VDDM
VPOR
t
PULSE
VDROPH
Undefined
t
RESET
Undefined
1
2
3
4
5
6
2
1
VDROPL
Figure 7 – Power-On / Brown-out Reset Conditions
1. Device behavior is undefined until VDDM rises above VPOR, at which point NRESET is driven to GND
by the SX1501, SX1502 or SX1503.
2.
After tRESET, NRESET is released (high-impedance) by the SX1501, SX1502 or SX1503 to allow it to be
pulled high by an external resistor.
3.
In operation, the SX1501, SX1502 and SX1503 may be reset at anytime by an external device driving
NRESET low during tPULSE. Chip can be accessed normally again after NRESET rising edge.
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