PIC16C74B-20/P Microchip Technology Inc., PIC16C74B-20/P Datasheet - Page 166

• Manufacturer Part Number: PIC16C74B-20/P
• Description: 40 PIN, 7 KB OTP, 192 RAM, 33 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16C74B-20/P

• A/d Inputs: 8-Channel, 8-Bit
• Cpu Speed: 5 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 33
• Interface: I2C/SPI/USART
• Memory Type: OTP
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 7K Bytes
• Ram Size: 192 Bytes
• Speed: 4 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2.5-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC16C63A/65B/73B/74B
APPENDIX C:
This document is intended to describe the functional differences and the electrical specification differences that are
present when migrating from one device to the next. Table C-1 shows functional differences, while Table C-2 shows
electrical and timing differences.
TABLE C-1:
DS30605C-page 166
H/W - Issues may exist with regard to the application circuits.
S/W - Issues may exist with regard to the user program.
Prog. - Issues may exist when writing the program to the controller.
No.
10
Note:
Note:
1
2
3
4
5
6
7
8
9
Module
USART Async receive errors due to BRGH setting corrected.
Timers
CCP
SSP
A/D
Even though compatible devices are specified to be tested to the same electrical specification, the device
characteristics may be different from each other (due to process differences). For systems that were
designed to the device specifications, these process differences should not cause any issues in the appli-
cation. For systems that did not tightly meet the electrical specifications, the process differences may cause
the device to behave differently in the application.
While there are no functional or electrical changes to the device oscillator specifications, the user should
verify that the device oscillator starts and performs as expected. Adjusting the loading capacitor values
and/or the oscillator mode may be required.
CCP Special Event Trigger clears Timer1.
Compare mode drives pin correctly.
Writing to TMR1L does not affect TMR1H.
WDT/TMR0 prescaler assignment changes do not affect TMR0 count.
TMR2 SPI clock synchronized to start of SPI Transmission.
Can now transmit multiple words in SPI mode.
Supports all four SPI modes. (Now uses SSP vs. BSSP module.)
See SSP module in the PICmicro™ Mid-Range MCU Family Reference Man-
ual (DS33023).
I
V
This allows conversion of digital inputs. (A/D on PIC16C73X/74X only.)
2
FUNCTIONAL DIFFERENCES
REF
C no longer generates ACK pulses when module is enabled.
DEVICE MIGRATIONS -
PIC16C63/65A/73A/74A
= V
DD
when all inputs are configured as digital.
Differences from PIC16C63/65A/73A/74A
PIC16C63A/65B/73B/74B
2000 Microchip Technology Inc.
H/W S/W Prog.
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