- 您现在的位置：买卖IC网 > PDF目录3776 > PCA9698BS,118 (NXP Semiconductors)IC I/O EXPANDER I2C 40B 56HVQFN PDF资料下载
参数资料
| 型号： | PCA9698BS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 20/48页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 40B 56HVQFN |
| 产品培训模块： | I²C Bus Fundamentals |
| 特色产品： | NXP - I2C Interface |
| 标准包装： | 1 |
| 接口： | I²C |
| 输入/输出数： | 40 |
| 中断输出： | 是 |
| 频率 - 时钟： | 1MHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-VFQFN 裸露焊盘 |
| 供应商设备封装： | 56-HVQFN |
| 包装： | 标准包装 |
| 包括： | POR |
| 产品目录页面： | 826 (CN2011-ZH PDF) |
| 其它名称： | 568-3240-6 |
第1页第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页当前第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页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页
27
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
selectable delays are shown in Table 8-2. The frequency of the Watchdog Oscillator is voltage
dependent as shown in “Typical Characteristics” on page 315.
Main purpose of the delay is to keep the AVR in reset until it is supplied with minimum V
CC. The
delay will not monitor the actual voltage and it will be required to select a delay longer than the
V
CC rise time. If this is not possible, an internal or external Brown-Out Detection circuit should be
used. A BOD circuit will ensure sufficient V
CC before it releases the reset, and the time-out delay
can be disabled. Disabling the time-out delay without utilizing a Brown-Out Detection circuit is
not recommended.
The oscillator is required to oscillate for a minimum number of cycles before the clock is consid-
ered stable. An internal ripple counter monitors the oscillator output clock, and keeps the internal
reset active for a given number of clock cycles. The reset is then released and the device will
start to execute. The recommended oscillator start-up time is dependent on the clock type, and
varies from 6 cycles for an externally applied clock to 32K cycles for a low frequency crystal.
The start-up sequence for the clock includes both the time-out delay and the start-up time when
the device starts up from reset. When starting up from Power-save or Power-down mode, V
CC is
assumed to be at a sufficient level and only the start-up time is included.
8.3
Low Power Crystal Oscillator
Pins XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier which can be
configured for use as an On-chip Oscillator, as shown in Figure 8-2 on page 28. Either a quartz
crystal or a ceramic resonator may be used.
This Crystal Oscillator is a low power oscillator, with reduced voltage swing on the XTAL2 out-
put. It gives the lowest power consumption, but is not capable of driving other clock inputs, and
may be more susceptible to noise in noisy environments. In these cases, refer to the “Full Swing
C1 and C2 should always be equal for both crystals and resonators. The optimal value of the
capacitors depends on the crystal or resonator in use, the amount of stray capacitance, and the
electromagnetic noise of the environment. Some initial guidelines for choosing capacitors for
use with crystals are given in Table 8-3 on page 28. For ceramic resonators, the capacitor val-
ues given by the manufacturer should be used.
Table 8-2.
Number of Watchdog Oscillator Cycles
Typ Time-out (VCC = 5.0V)
Typ Time-out (VCC = 3.0V)
Number of Cycles
0 ms
0
4.1 ms
4.3 ms
512
65 ms
69 ms
8K (8,192)
相关PDF资料 |
PDF描述 |
|---|---|
| PCA9555D,112 | IC I/O EXPANDER I2C 16B 24SOIC |
| PCA9555DB,112 | IC I/O EXPANDER I2C 16B 24SSOP |
| PCA9555PW,112 | IC I/O EXPANDER I2C 16B 24TSSOP |
| 5-531478-4 | CONT.MINI-LEAF STRIP |
| 5-583857-5 | TWIN LEAF DUMMY CONTACT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9698DGG | 功能描述:接口-I/O扩展器 I2C I/O EXPANDER GP RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA9698DGG,512 | 功能描述:接口-I/O扩展器 I2C I/O EXPANDER GP RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA9698DGG,518 | 功能描述:接口-I/O扩展器 40BT I2C FM+TPGPIO IN-RS-PU OE RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA9698DGG/S911,51 | 功能描述:接口-I/O扩展器 40BT I2C FM+TPGPIO IN-RS-PU OE RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA9698DGG/S911-T | 功能描述:接口-I/O扩展器 40BT I2C FM+TPGPIO IN-RS-PU OE RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。