th May 2012 www.semtech.com 27 SX1504/SX1505/SX1506 4/8/16 Channel GP" />
參數(shù)資料
型號(hào)： SX1504I087TRT
廠商： Semtech
文件頁數(shù)： 20/31頁
文件大?。?/td> 0K
描述： IC GPIO EXPANDER I2C 4CH 20QFN
產(chǎn)品培訓(xùn)模塊： Low Voltage GPIO Expander Family
標(biāo)準(zhǔn)包裝： 1
接口： I²C
輸入/輸出數(shù)： 4
中斷輸出： 是
頻率 - 時(shí)鐘： 400kHz
電源電壓： 2.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 20-UFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-QFN-UT（3x3）
包裝： 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面： 1359 (CN2011-ZH PDF)
其它名稱： SX1504I087DKR
WIRELESS & SENSING
Rev 3 – 16
th May 2012
www.semtech.com
27
SX1504/SX1505/SX1506
4/8/16 Channel GPIO
6.2.2
LED Intensity Control
When the max IOL spec is not enough it is possible to drive simultaneously multiple I/Os connected together
hence increasing the total sink capability.
Example: on an SX1505, by driving an LED with both IO[2] and IO[3] one can sink up to 24+24 =48mA.
Driving an LED with multiple I/Os can also be used to implement more intensity steps for the LED.
Example: with two I/Os capable of sinking each 24mA the LED can sink a total of 0mA (no I/O set to “0”), 24mA
(one I/O set to “0”) or 48mA (both I/Os set to “0”) => 3 LED intensity steps ( 4 steps with 3 I/Os, 5 steps with 4
I/Os, etc)
6.3
Keypad Implementation
SX1504, SX1505, and SX1506 can be used to implement keypad applications up to 8x8 matrix (i.e. 64 keys)
Example: We want to implement a 4x4matrix keypad on SX1505
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
SX1502
IO[7-0] as inputs with internal pull-ups enabled
Figure 14 – 4x4 keypad connection to SX1505
1.
Set all I/Os as inputs with internal pull-up (RegDir = 0xFF, RegPullUp = 0xFF)
2.
Set NINT to be triggered on any IO’s falling edge (RegInterruptMask = 0x00, RegSenseHigh = 0xAA,
RegSenseLow = 0xAA)
3.
When NINT goes low read RegData (or RegInterruptSource) to know the X:Y coordinates of the button
which has been pressed.
4.
Clear NINT (RegInterruptSource = 0xFF, can be done automatically on SX1506 depending on
RegAdvanced setting)
5.
Restart from point 3
6.4
Level Shifter Implementation Hints
Because of their I/O banks with independent supply voltages between 2.5V and 5.5V, the SX1505 and SX1506
can be used to perform level shifting of signals from one I/O bank to an other (uC reads I/O from one I/O bank
and sends it back to the other I/O bank)
This can save significant BOM cost in a final application where only a few slow signals need to be level-shifted.
相關(guān)PDF資料
PDF描述
SX1509BULTRT IC GPIO EXPANDER I2C 16CH 28QFN
SX8722I070TRLF IC ZOOMING ADC 10BIT 16CH 44MLPQ
SX8723CWLTDT IC DAS ADC 16BIT I2C/SRL
SX8723E083TDT IC DAS PRESS/TEMP SENS 12MLPD
SX8724CWLTDT IC DAS ADC 16BIT I2C/SRL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SX1504I088TRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4/8/16 Channel GPIO with NINT and NRESET
SX1505I087TRT 功能描述:IC GPIO EXP I2C 8CH 20UTQFN RoHS:是 類別:集成電路 (IC) >> 接口 - I/O 擴(kuò)展器 系列:- 產(chǎn)品培訓(xùn)模塊:I²C Bus Fundamentals 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 接口:I²C，SM 總線 輸入/輸出數(shù):16 中斷輸出:是 頻率 - 時(shí)鐘:400kHz 電源電壓:2.3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:24-TSSOP 包裝:Digi-Reel® 包括:POR 產(chǎn)品目錄頁面:826 (CN2011-ZH PDF) 配用:568-4002-ND - DEMO BOARD I2C 其它名稱:568-1058-6
SX1505I088TRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4/8/16 Channel GPIO with NINT and NRESET
SX1506I089TRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:4/8/16 Channel GPIO with NINT and NRESET
SX1506I091TRT 功能描述:IC GPIO EXP I2C 16CH 28UTQFN RoHS:是 類別:集成電路 (IC) >> 接口 - I/O 擴(kuò)展器 系列:- 產(chǎn)品培訓(xùn)模塊:I²C Bus Fundamentals 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 接口:I²C，SM 總線 輸入/輸出數(shù):16 中斷輸出:是 頻率 - 時(shí)鐘:400kHz 電源電壓:2.3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:24-TSSOP 包裝:Digi-Reel® 包括:POR 產(chǎn)品目錄頁面:826 (CN2011-ZH PDF) 配用:568-4002-ND - DEMO BOARD I2C 其它名稱:568-1058-6
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*