V
參數(shù)資料
型號: PIC16CE625T-20I/SS
廠商: Microchip Technology
文件頁數(shù): 66/100頁
文件大小: 0K
描述: IC MCU OTP 2KX14 EE COMP 20SSOP
產(chǎn)品培訓模塊: Asynchronous Stimulus
標準包裝: 1,600
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
外圍設備: 欠壓檢測/復位,POR,WDT
輸入/輸出數(shù): 13
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: OTP
EEPROM 大?。?/td> 128 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 20-SSOP(0.209",5.30mm 寬)
包裝: 帶卷 (TR)
配用: 309-1016-ND - ADAPTER 20-SSOP TO 18-DIP
其它名稱: PIC16CE625T-20ISS
PIC16CE62X
DS40182C-page 58
1999 Microchip Technology Inc.
FIGURE 10-11: EXTERNAL POWER-ON
RESET CIRCUIT (FOR SLOW
VDD POWER-UP)
FIGURE 10-12: 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 capacitor quickly when
VDD powers down.
2:
< 40 k
is recommended to make sure that
voltage drop across R does not violate the
device’s electrical specification.
3: R1 = 100
to 1 k will limit any current flowing
into MCLR from external capacitor C in the
event of MCLR/VPP pin breakdown due to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS).
C
R1
R
D
VDD
MCLR
PIC16CE62X
VDD
Note 1:
This circuit will activate reset when VDD
goes below (Vz + 0.7V) where Vz = Zener
voltage.
2: Internal Brown-out Reset circuitry should be
disabled when using this circuit.
VDD
33k
10k
40k
PIC16CE62X
VDD
MCLR
FIGURE 10-13: EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
FIGURE 10-14: 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:
2: Internal brown-out detection should be dis-
abled when using this circuit.
3: Resistors should be adjusted for the charac-
teristics of the transistor.
VDD x
R1
R1 + R2
= 0.7 V
VDD
R2
40k
PIC16CE62X
R1
Q1
VDD
MCLR
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
PIC16CE62X
VDD
VSS
RST
MCP809
VDD
bypass
capacitor
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