PIC16C74/JW Microchip Technology, PIC16C74/JW Datasheet - Page 140
![MICRO CTRL 4K 20MHZ EPROM 40CDIP](/photos/6/63/66338/150-40-cdip_sml.jpg)
PIC16C74/JW
Manufacturer Part Number
PIC16C74/JW
Description
MICRO CTRL 4K 20MHZ EPROM 40CDIP
Manufacturer
Microchip Technology
Series
PIC® 16Cr
Datasheet
1.PIC16C72-04SO.pdf
(289 pages)
Specifications of PIC16C74/JW
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
33
Program Memory Size
7KB (4K x 14)
Program Memory Type
EPROM, UV
Ram Size
192 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 6 V
Data Converters
A/D 8x8b
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
40-CDIP (0.600", 15.24mm) Window
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16C74/JW
Manufacturer:
Microchip
Quantity:
29
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PIC16C7X
FIGURE 14-13: EXTERNAL POWER-ON
DS30390E-page 140
Note 1: External Power-on Reset circuit is required
2: R < 40 k is recommended to make sure
3: R1 = 100 to 1 k will limit any current
only if V
diode D helps discharge the capacitor
quickly when V
that voltage drop across R does not violate
the device’s electrical specification.
flowing into MCLR from external capacitor
C in the event of MCLR/V
down due to Electrostatic Discharge
(ESD) or Electrical Overstress (EOS).
D
V
DD
RESET CIRCUIT (FOR SLOW
V
DD
R
DD
C
power-up slope is too slow. The
POWER-UP)
DD
R1
powers down.
PIC16CXX
MCLR
PP
pin break-
FIGURE 14-14: EXTERNAL BROWN-OUT
FIGURE 14-15: EXTERNAL BROWN-OUT
Note 1: This circuit will activate reset when V
Note 1: This brown-out circuit is less expensive,
V
V
2: Internal brown-out detection on the
3: Resistors should be adjusted for the char-
DD
DD
2: Internal brown-out detection on the
3: Resistors should be adjusted for the
goes below (Vz + 0.7V) where Vz = Zener
voltage.
PIC16C72/73A/74A/76/77 should be dis-
abled when using this circuit.
acteristics of the transistor.
R1
R2
33k
albeit less accurate. Transistor Q1 turns
off when V
such that:
PIC16C72/73A/74A/76/77 should be
disabled when using this circuit.
characteristics of the transistor.
V
DD
PROTECTION CIRCUIT 1
PROTECTION CIRCUIT 2
•
10k
DD
R1 + R2
is below a certain level
R1
1997 Microchip Technology Inc.
Q1
40k
40k
= 0.7V
MCLR
V
PIC16CXX
MCLR
V
PIC16CXX
DD
DD
DD
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