参数资料
| 型号： | SX1509BULTRT |
| 厂商： | Semtech |
| 文件页数： | 5/41页 |
| 文件大小： | 0K |
| 描述： | IC GPIO EXPANDER I2C 16CH 28QFN |
| 特色产品： | SX1508/SX1509 GPIO Expanders |
| 标准包装： | 1 |
| 接口： | I²C |
| 输入/输出数： | 16 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 1.2 V ~ 3.6 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-UT（4x4） |
| 包装： | 标准包装 |
| 包括： | LED 驱动器 / 小键盘引擎 |
| 其它名称： | SX1509IULDKR SX1509IULDKR-ND |
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ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
th Oct. 2009
13
www.semtech.com
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
4.3
SX1509 16-channel I
2C GPIO with LED Driver and Keypad Engine
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
LED Driver
Blink (Timer)
Breath (Ramp)
Intensity (PWM)
Clock Mgmt
Internal
Oscillator
External
Clock
I/O Bank A
A
I/O Bank B
A
SX1509
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
OSCIO
ADDR1
ADDR0
Keypad
Engine
64 Keys Max
Auto
Sleep/Wakeup
Figure 6 – 16-channel Low Voltage GPIO with LED Driver and Keypad Engine
4.4
Reset
4.4.1
Hardware (NRESET)
The SX1507, SX1508 and SX1509 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 SX1507, SX1508 or SX1509 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 SX1507, SX1508 or SX1509.
2.
After tRESET, NRESET is released (high-impedance) by the SX1507, SX1508 or SX1509 to allow it to be
pulled high by an external resistor.
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相关代理商/技术参数 |
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| SX1509EVK | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Worlds Lowest Voltage Level |
| SX1509IULTRT | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Worlds Lowest Voltage Level |
| SX1509QB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine |
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