參數(shù)資料
型號： PIC16C621-20/SS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDSO20
封裝： 0.209 INCH, PLASTIC, MO-150, SSOP-20
文件頁數(shù)： 72/121頁
文件大小： 1202K
代理商： PIC16C621-20/SS
PIC16C62X
DS30235H-page 54
1999 Microchip Technology Inc.
FIGURE 9-12: EXTERNAL POWER-ON
RESET CIRCUIT (FOR SLOW
VDD POWER-UP)
FIGURE 9-13: EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
Note 1: External power-on reset circuit is required
only if VDD power-up slope is too slow.
The diode D helps discharge the capaci-
tor quickly when VDD powers down.
Note 2: < 40 k
is recommended to make sure
that voltage drop across R does not vio-
late the device’s electrical specification.
Note 3: R1 = 100
to 1 k will limit any current
flowing into MCLR from external capaci-
tor C in the event of MCLR/VPP pin break-
down due to Electrostatic Discharge
(ESD) or Electrical Overstress (EOS).
C
R1
R
D
VDD
MCLR
PIC16C62X
VDD
Note 1: This circuit will activate reset when VDD
goes below (Vz + 0.7V) where Vz = Zener
voltage.
Note 2: Internal Brown-out Reset circuitry should
be disabled when using this circuit.
VDD
33k
10k
40k
VDD
MCLR
PIC16C62X
FIGURE 9-14: EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
FIGURE 9-15: EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 3
Note 1: This brown-out circuit is less expensive,
albeit less accurate. Transistor Q1 turns
off when VDD is below a certain level
such that:
Note 2: Internal brown-out reset should be dis-
abled when using this circuit.
Note 3: Resistors should be adjusted for the
characteristics of the transistor.
VDD x
R1
R1 + R2
= 0.7 V
VDD
R2
40k
VDD
MCLR
PIC16C62X
R1
Q1
This
brown-out
protection
circuit
employs
Microchip Technology’s MCP809 microcontroller
supervisor. The MCP8XX and MCP1XX families
of supervisors provide push-pull and open
collector outputs with both high and low active
reset pins. There are 7 different trip point
selections to accommodate 5V and 3V systems.
MCLR
PIC16C62X
VDD
Vss
RST
MCP809
VDD
bypass
capacitor
VDD
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C621A/JW 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O 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
PIC16C621A-04/P 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O 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
PIC16C621A-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C621 DIP18
PIC16C621A-04/SO 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O 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
PIC16C621A-04/SS 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O 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
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