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參數(shù)資料
| 型號： | PCA9698DGG,512 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 25/48頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 40B 56TSSOP |
| 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： | 35 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 40 |
| 中斷輸出： | 是 |
| 頻率 - 時鐘： | 1MHz |
| 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： | 56-TFSOP（0.240"，6.10mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 56-TSSOP |
| 包裝： | 管件 |
| 包括： | POR |
| 產(chǎn)品目錄頁面： | 826 (CN2011-ZH PDF) |
| 其它名稱： | 568-3241-5 935278614512 PCA9698DGG |
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31
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
8.5
Low Frequency Crystal Oscillator
The Low-frequency Crystal Oscillator is optimized for use with a 32.768 kHz watch crystal.
When selecting crystals, load capasitance and crystal’s Equivalent Series Resistance, ESR
must be taken into consideration. Both values are specified by the crystal vendor. ATmega328P
oscillator is optimized for very low power consumption, and thus when selecting crystals, see
Table 8-7 on page 31 for maximum ESR recommendations on 6.5 pF, 9.0 pF and 12.5 pF
crystals
Table 8-7.
Maximum ESR Recommendation for 32.768 kHz Crystal
Note:
1. Maximum ESR is typical value based on characterization
The Low-frequency Crystal Oscillator provides an internal load capacitance of typical 6 pF at
each TOSC pin. The external capacitance (C) needed at each TOSC pin can be calculated by
using:
where CL is the load capacitance for a 32.768 kHz crystal specified by the crystal vendor and C
S
is the total stray capacitance for one TOSC pin.
Crystals specifying load capacitance (CL) higher than 6 pF, require external capacitors applied
as described in Figure 8-2 on page 28.
The Low-frequency Crystal Oscillator must be selected by setting the CKSEL Fuses to “0110” or
“0111”, as shown in Table 8-9. Start-up times are determined by the SUT Fuses as shown in
Note:
1. This option should only be used if frequency stability at start-up is not important for the
application
Crystal CL (pF)
Max ESR [k
Ω](1)
6.5
75
9.0
65
12.5
30
Table 8-8.
Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
SUT1..0
Additional Delay from Reset (V
CC = 5.0V)
Recommended Usage
00
4 CK
Fast rising power or BOD enabled
01
4 CK + 4.1 ms
Slowly rising power
10
4 CK + 65 ms
Stable frequency at start-up
11
Reserved
Table 8-9.
Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
CKSEL3..0
Start-up Time from
Power-down and Power-save
Recommended Usage
0100(1)
1K CK
0101
32K CK
Stable frequency at start-up
C2
CL
C
S
–
×
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9698DGGS911,51 | 功能描述:I2C 接口集成電路 40-bit Fm I2C Bus I/O port w/Reset RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| PCA9698DGGT | 制造商:NXP Semiconductors 功能描述:I2C GPIO Expander 5.5V 56-Pin TSSOP T/R |
| PCA9698DGG-T | 制造商:NXP Semiconductors 功能描述:I2C GPIO Expander 5.5V 56-Pin TSSOP T/R |
| PCA96PWS911,118 | 功能描述:接口-I/O擴展器 8-BIT I2C FM QB RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9701D | 功能描述:寄存器 16BIT SPI 18V GPI INT -40 +125 RoHS:否 制造商:NXP Semiconductors 邏輯類型:CMOS 邏輯系列:HC 電路數(shù)量:1 最大時鐘頻率:36 MHz 傳播延遲時間: 高電平輸出電流:- 7.8 mA 低電平輸出電流:7.8 mA 電源電壓-最大:6 V 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-38 封裝:Tube |
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