- 您现在的位置：买卖IC网 > PDF目录196353 > TCA8418EYFPR (TEXAS INSTRUMENTS INC) SPECIALTY ANALOG CIRCUIT, BGA25 PDF资料下载
参数资料
| 型号： | TCA8418EYFPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, BGA25 |
| 封装： | 2 X 2 MM, 0.40 MM PITCH, DSBGA-25 |
| 文件页数： | 2/31页 |
| 文件大小： | 400K |
| 代理商： | TCA8418EYFPR |
第1页当前第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页
V
CC
V
POR
V
PORF
Time
POR
Time
SCPS222B – MAY 2010 – REVISED SEPTEMBER 2010
www.ti.com
Figure 4. VPOR
For proper operation of the power-on reset feature, use as directed in the figures and table above.
Interrupt Output
An interrupt is generated by any rising or falling edge of the port inputs in the input mode. After time tiv, the signal
INT is valid. Resetting the interrupt circuit is achieved when data on the port is changed to the original setting or
data is read from the port that generated the interrupt. Resetting occurs in the read mode at the acknowledge
(ACK) or not acknowledge (NACK) bit after the rising edge of the SCL signal. Interrupts that occur during the
ACK or NACK clock pulse can be lost (or be very short) due to the resetting of the interrupt during this pulse.
Each change of the I/Os after resetting is detected and is transmitted as INT.
Reading from or writing to another device does not affect the interrupt circuit, and a pin configured as an output
cannot cause an interrupt. Changing an I/O from an output to an input may cause a false interrupt to occur, if the
state of the pin does not match the contents of the input port register.
The INT output has an open-drain structure and requires a pullup resistor to VCC depending on the application. If
the INT signal is connected back to the processor that provides the SCL signal to the TCA64xxA, then the INT
pin has to be connected to VCC. If not, the INT pin can be connected to VCCP.
For more information on the interrupt output feature, see Control Register and Command Byte and Typical
Applications.
50 Micro-second Interrupt Configuration
The TCA8418E provides the capability of deasserting the interrupt for 50 ms while there is a pending event.
When the INT_CFG bit in Register 0x01 is set, any attempt to clear the interrupt bit while the interrupt pin is
already asserted results in a 50 ms deassertion. When the INT_CFG bit is cleared, processor interrupt remains
asserted if the host tries to clear the interrupt. This feature is particularly useful for software development and
edge triggering applications.
I
2C Interface
The bidirectional I2C bus consists of the serial clock (SCL) and serial data (SDA) lines. Both lines must be
connected to a positive supply through a pullup resistor when connected to the output stages of a device. Data
transfer may be initiated only when the bus is not busy.
10
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TCA8418E
相关PDF资料 |
PDF描述 |
|---|---|
| TCD2253D | SPECIALTY ANALOG CIRCUIT, CDIP22 |
| TCD4027036BC015000-12.75M | TCXO, CLIPPED SINE OUTPUT, 12.75 MHz |
| TCD4029055DK015000-10M | TCXO, CLIPPED SINE OUTPUT, 10 MHz |
| TCD4027036EH015000-12.75M | TCXO, CLIPPED SINE OUTPUT, 12.75 MHz |
| TCD4027036FG015000-12.75M | TCXO, CLIPPED SINE OUTPUT, 12.75 MHz |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TCA8418EYFPR | 制造商:Texas Instruments 功能描述:IC I2C CONTROLLED KEYPAD SCAN 3.6V 25 |
| TCA8418RTWR | 功能描述:I2C 接口集成电路 Low-Vltg 16B I2C & SMBus I/O Expander RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| TCA8418YFPR | 制造商:TI 制造商全称:Texas Instruments 功能描述:I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION |
| TCA8424 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Check for Samples: TCA8424 |
| TCA8424EVM-038 | 功能描述:界面开发工具 TCA8424 EVAL MOD RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
发布紧急采购，3分钟左右您将得到回复。