參數(shù)資料
型號： PIC18F45J50-I/ML
廠商： Microchip Technology
文件頁數(shù)： 83/164頁
文件大?。?/td> 0K
描述： IC PIC MCU FLASH 32K 2V 44-QFN
產(chǎn)品培訓模塊： XLP Deep Sleep Mode
PIC18 J Series MCU Overview
8-bit PIC® Microcontroller Portfolio
標準包裝： 45
系列： PIC® XLP™ 18F
核心處理器： PIC
芯體尺寸： 8-位
速度： 48MHz
連通性： I²C，SPI，UART/USART，USB
外圍設備： 欠壓檢測/復位，DMA，POR，PWM，WDT
輸入/輸出數(shù)： 34
程序存儲器容量： 32KB（16K x 16）
程序存儲器類型： 閃存
RAM 容量： 3.8K x 8
電壓 - 電源 (Vcc/Vdd)： 2.15 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 13x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-VQFN 裸露焊盤
包裝： 管件
產(chǎn)品目錄頁面： 657 (CN2011-ZH PDF)
配用： AC164322-ND - MODULE SOCKET MPLAB PM3 28/44QFN
PIC18F46J50 FAMILY
DS39931D-page 30
2011 Microchip Technology Inc.
2.2
Power Supply Pins
2.2.1
DECOUPLING CAPACITORS
The use of decoupling capacitors on every pair of
power supply pins, such as VDD, VSS, AVDD and
AVSS, is required.
Consider the following criteria when using decoupling
capacitors:
Value and type of capacitor: A 0.1
F (100 nF),
10-20V capacitor is recommended. The capacitor
should be a low-ESR device, with a resonance
frequency in the range of 200 MHz and higher.
Ceramic capacitors are recommended.
Placement on the printed circuit board: The
decoupling capacitors should be placed as close
to the pins as possible. It is recommended to
place the capacitors on the same side of the
board as the device. If space is constricted, the
capacitor can be placed on another layer on the
PCB using a via; however, ensure that the trace
length from the pin to the capacitor is no greater
than 0.25 inch (6 mm).
Handling high-frequency noise: If the board is
experiencing high-frequency noise (upward of
tens of MHz), add a second ceramic type capaci-
tor in parallel to the above described decoupling
capacitor. The value of the second capacitor can
be in the range of 0.01
F to 0.001 F. Place this
second capacitor next to each primary decoupling
capacitor. In high-speed circuit designs, consider
implementing a decade pair of capacitances as
close to the power and ground pins as possible
(e.g., 0.1
F in parallel with 0.001 F).
Maximizing performance: On the board layout
from the power supply circuit, run the power and
return traces to the decoupling capacitors first,
and then to the device pins. This ensures that the
decoupling capacitors are first in the power chain.
Equally important is to keep the trace length
between the capacitor and the power pins to a
minimum, thereby reducing PCB trace
inductance.
2.2.2
BULK CAPACITORS
On boards with power traces running longer than
six inches in length, it is suggested to use a larger
energy storing capacitor for integrated circuits, includ-
ing microcontrollers, to supply a local power source.
The value of this capacitor should be determined based
on the trace resistance that connects the power supply
source to the device, and the maximum current drawn
by the device in the application. In other words, select
the capacitor so that it meets the acceptable voltage
sag at the device. Typical values range from 4.7
F to
47
F.
2.3
Master Clear (MCLR) Pin
The MCLR pin provides two specific device
functions: Device Reset, and Device Programming
and Debugging. If programming and debugging are
not required in the end application, a direct
connection to VDD may be all that is required. The
addition of other components, to help increase the
application’s resistance to spurious Resets from
voltage
sags,
may
be
beneficial.
A
typical
configuration is shown in Figure 2-1. Other circuit
designs may be implemented, depending on the
application’s requirements.
During programming and debugging, the resistance
and capacitance that can be added to the pin must
be considered. Device programmers and debuggers
drive the MCLR pin. Consequently, specific voltage
levels (VIH and VIL) and fast signal transitions must
not be adversely affected. Therefore, specific values
of R1 and C1 will need to be adjusted based on the
application and PCB requirements. For example, it is
recommended that the capacitor, C1, be isolated
from the MCLR pin during programming and
debugging operations by using a jumper (Figure 2-2).
The
jumper
is
replaced
for
normal
run-time
operations.
Any components associated with the MCLR pin
should be placed within 0.25 inch (6 mm) of the pin.
FIGURE 2-2:
EXAMPLE OF MCLR PIN
CONNECTIONS
Note 1:
R1
10 k is recommended. A suggested
starting value is 10 k
. Ensure that the
MCLR pin VIH and VIL specifications are met.
2:
R2
470 will limit any current flowing into
MCLR from the external capacitor, C, in the
event of MCLR pin breakdown, due to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS). Ensure that the MCLR pin
VIH and VIL specifications are met.
C1
R2
R1
VDD
MCLR
PIC18FXXJXX
JP
相關PDF資料
PDF描述
ATMEGA128L-8AC IC AVR MCU 128K 8MHZ LV 64-TQFP
ATMEGA128-16AI IC AVR MCU 128K 16MHZ 64-TQFP
PIC24EP64GP202-I/SS MCU 16BIT 64KB FLASH 28SSOP
ATMEGA128-16AC IC AVR MCU 128K 16MHZ 64-TQFP
PIC18LF26J50-I/ML IC PIC MCU FLASH 64K 2V 28-QFN
相關代理商/技術參數(shù)
參數(shù)描述
PIC18F45J50T-I/ML 功能描述:8位微控制器 -MCU Full Spd USB 32KB 4KBRAM nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18F45J50T-I/PT 功能描述:8位微控制器 -MCU Full Spd USB 32KB 4KBRAM nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18F45K20-E/ML 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 25 I/O 8B RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18F45K20-E/MV 功能描述:8位微控制器 -MCU 32KB FL 1536b RAM 8b Familynanowatt XLP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC18F45K20-E/P 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 25 I/O 8B RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*