PIC16F874A-E/L Microchip Technology, PIC16F874A-E/L Datasheet - Page 452
![IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,44PIN,PLASTIC](/photos/6/63/66325/150-44-plcc_sml.jpg)
PIC16F874A-E/L
Manufacturer Part Number
PIC16F874A-E/L
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,44PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16C770-ISO.pdf
(8 pages)
4.PIC16F873A-ISO.pdf
(234 pages)
5.PIC16F873A-ISO.pdf
(6 pages)
6.PIC16F873A-ISO.pdf
(4 pages)
7.PIC16F873A-ISO.pdf
(6 pages)
8.PIC16F873A-ISO.pdf
(4 pages)
9.PIC16F873A-ISO.pdf
(22 pages)
Specifications of PIC16F874A-E/L
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
33
Program Memory Size
7KB (4K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
192 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F874A-E/L
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16C770-ISO PDF datasheet #3
- PIC16F873A-ISO PDF datasheet #4
- PIC16F873A-ISO PDF datasheet #5
- PIC16F873A-ISO PDF datasheet #6
- PIC16F873A-ISO PDF datasheet #7
- PIC16F873A-ISO PDF datasheet #8
- PIC16F873A-ISO PDF datasheet #9
- Current page: 452 of 688
- Download datasheet (3Mb)
PICmicro MID-RANGE MCU FAMILY
24.3.7
DS31024A-page 24-10
Slope A/D Resolution, Speed, Voltage Range, and Capacitor Selection
The Slope A/D module allows many trade-offs. For a conversion the user needs to make the fol-
lowing Trade-offs:
• The Resolution of the Result
• The Speed of the Conversion
• The Analog Input Voltage Range
• The External Capacitor
The resolution is the number of bits that is used by the ADTMR to represent the measured input
voltage. This resolution affects the time that the conversion can be completed in.
shows the trade-off between the resolution of the conversion and the maximum conversion time.
The conversion time for the Slope A/D converter can be calculated using the equation:
Therefore at 4 MHz, the conversion time for 16 bits is 16.384 msec. Conversely, it is 256 sec for
10-bits.
Table 24-1: ADTMR Initialization Values and Conversion Times
Resolution
Conversion Time = (1/Fosc) x 2
Where Fosc is the oscillator frequency and N is the number of bits of resolution desired.
Bits
.
16
15
14
13
12
11
10
Value Loaded
into ADTMR
C000h
E000h
FC00h
0000h
8000h
F000h
F800h
65536 T
32768 T
16384 T
N
8192 T
4096 T
2048 T
1024 T
Cycles
OSC
OSC
OSC
OSC
OSC
OSC
OSC
Maximum Conversion Time
204.8 s
102.4 s
3.28 ms
1.64 ms
20 MHz
51.2 s
820 s
410 s
1997 Microchip Technology Inc.
16.38 ms
2.05 ms
1.03 ms
8.2 ms
4.1 ms
500 s
250 s
4 MHz
Table 24-1
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