PIC16F87XA
The available features are summarized in Table 1-1.
Block diagrams of the PIC16F873A/876A and
PIC16F874A/877A devices are provided in Figure 1-1
and Figure 1-2, respectively. The pinouts for these
device families are listed in Table 1-2 and Table 1-3.
1.0
DEVICE OVERVIEW
This document contains device specific information
about the following devices:
• PIC16F873A
• PIC16F874A
• PIC16F876A
• PIC16F877A
Additional information may be found in the PICmicro™
Mid-Range Reference Manual (DS33023), which may
be obtained from your local Microchip Sales Represen-
tative or downloaded from the Microchip website. The
Reference Manual should be considered a complemen-
tary document to this data sheet, and is highly recom-
mended reading for a better understanding of the device
architecture and operation of the peripheral modules.
PIC16F873A/876A devices are available only in 28-pin
packages, while PIC16F874A/877A devices are avail-
able in 40-pin and 44-pin packages. All devices in the
PIC16F87XA family share common architecture, with
the following differences:
• the PIC16F873A and PIC16F876A have one-half
of the total on-chip memory of the PIC16F874A
and PIC16F877A
• the 28-pin devices have three I/O ports, while the
40/44-pin devices have five
• the 28-pin devices have 14 interrupts, while the
40/44-pin devices have 15
• the 28-pin devices have five A/D input channels,
while the 40/44-pin devices have eight
• the Parallel Slave Port is implemented only on the
40/44-pin devices
TABLE 1-1:
PIC16F87XA DEVICE FEATURES
Key Features
Operating Frequency
PIC16F873A
PIC16F874A
PIC16F876A
PIC16F877A
DC - 20 MHz
DC - 20 MHz
DC - 20 MHz
DC - 20 MHz
RESETS (and Delays)
POR, BOR
POR, BOR
POR, BOR
POR, BOR
(PWRT, OST)
(PWRT, OST)
(PWRT, OST)
(PWRT, OST)
FLASH Program Memory
(14-bit words)
4K
4K
8K
8K
Data Memory (bytes)
EEPROM Data Memory (bytes)
Interrupts
192
192
368
368
128
128
256
256
14
15
14
15
I/O Ports
Ports A,B,C
Ports A,B,C,D,E
Ports A,B,C
Ports A,B,C,D,E
Timers
3
3
3
3
Capture/Compare/PWM modules
Serial Communications
Parallel Communications
10-bit Analog-to-Digital Module
Analog Comparators
Instruction Set
2
MSSP, USART
—
2
2
MSSP, USART
—
2
MSSP, USART
PSP
MSSP, USART
PSP
5 input channels 8 input channels 5 input channels 8 input channels
2
2
2
2
35 Instructions
35 Instructions
35 Instructions
35 Instructions
Packages
28-pin PDIP
28-pin SOIC
28-pin SSOP
28-pin MLF
40-pin PDIP
44-pin PLCC
44-pin QFP
28-pin PDIP
28-pin SOIC
28-pin SSOP
28-pin MLF
40-pin PDIP
44-pin PLCC
44-pin QFP
2001 Microchip Technology Inc.
Advance Information
DS39582A-page 5
MICROCHIP [ MICROCHIP ]
