參數(shù)資料
型號(hào): 25LC128
廠商: Microchip Technology Inc.
英文描述: 128K 5.0V SPI Bus Serial EEPROM(2.5~5.5V,128K位,SPI總線串行EEPROM)
中文描述: 128K的5.0V SPI總線串行EEPROM(2.5?5.5V的,128K的位和SPI總線串行EEPROM的)
文件頁數(shù): 102/170頁
文件大?。?/td> 4191K
代理商: 25LC128
PIC16F62X
DS40300C-page 100
Preliminary
2003 Microchip Technology Inc.
FIGURE 14-11:
EXTERNAL POWER-ON
RESET CIRCUIT (FOR
SLOW V
DD
POWER-UP)
FIGURE 14-12:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
FIGURE 14-13:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
Note
1:
External Power-on Reset circuit is required
only if V
DD
power-up slope is too slow. The
diode D helps discharge the capacitor
quickly when V
DD
powers down.
R < 40 k
is recommended to make sure
that voltage drop across R does not violate
the device’s electrical specification.
R1 = 100
to 1 k
will limit any current
flowing into MCLR from external capacitor
C in the event of MCLR/V
PP
pin breakdown
due to Electrostatic Discharge (ESD) or
Electrical Overstress (EOS).
2:
3:
C
R1
R
D
V
DD
MCLR
PIC16F62X
V
DD
Note
1:
This circuit will activate RESET when V
DD
goes below (Vz + 0.7V) where Vz = Zener
voltage.
Internal Brown-out Detect Reset circuitry
should be disabled when using this circuit.
2:
V
DD
33k
10k
40k
V
DD
MCLR
PIC16F62X
V
DD
R2
40k
V
DD
MCLR
PIC16F62X
R1
Q1
Note
1:
This Brown-out Circuit is less expensive, albeit
less accurate. Transistor Q1 turns off when V
DD
is
below a certain level such that:
2:
Internal Brown-out Detect Reset should be
disabled when using this circuit.
Resistors should be adjusted for the
characteristics of the transistor.
3:
V
DD
x
R1
R1 + R2
= 0.7V
相關(guān)PDF資料
PDF描述
25C256 256K 5.0V SPI Bus Serial EEPROM(4.5~5.5V,256K位,SPI總線串行EEPROM)
25C160 8K/16K 5.0V SPI Bus Serial EEPROM
25C080 8K 5.0V SPI Bus Serial EEPROM(4.5~5.5V,3MHz,8K位,10M次可自定時(shí)擦寫周期,EEPROM)
25C320 32K 5.0V SPI Bus Serial EEPROM
25C320T 32K SPI Bus Serial EEPROM
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