PIC16LC74-04I/JW datasheet, PDF

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PIC16LC74-04I/JW: Description8-BIT, UVPROM, 4 MHz, RISC MICROCONTROLLER, CDIP40, 0.600 INCH, WINDOWED, CERDIP-40; CategoryThe embedded processor and controller Microcontrollers and processors; File Size100KB，19 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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PIC16LC74-04I/JW Overview

8-BIT, UVPROM, 4 MHz, RISC MICROCONTROLLER, CDIP40, 0.600 INCH, WINDOWED, CERDIP-40

PIC16LC74-04I/JW Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Microchip
Parts packaging code	DIP
package instruction	WDIP, DIP40,.6
Contacts	40
Reach Compliance Code	compliant
Has ADC	YES
Address bus width
bit size	8
CPU series	PIC
maximum clock frequency	4 MHz
DAC channel	NO
DMA channel	NO
External data bus width
JESD-30 code	R-GDIP-T40
JESD-609 code	e3
length	52.07 mm
Number of I/O lines	33
Number of terminals	40
On-chip program ROM width	14
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
PWM channel	YES
Package body material	CERAMIC, GLASS-SEALED
encapsulated code	WDIP
Encapsulate equivalent code	DIP40,.6
Package shape	RECTANGULAR
Package form	IN-LINE, WINDOW
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	3.3/5 V
Certification status	Not Qualified
RAM (bytes)	192
rom(word)	4096
ROM programmability	UVPROM
Maximum seat height	5.715 mm
speed	4 MHz
Maximum slew rate	3.8 mA
Maximum supply voltage	6 V
Minimum supply voltage	3 V
Nominal supply voltage	5 V
surface mount	NO
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	15.24 mm
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER, RISC
Base Number Matches	1

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Author:

AN597

THEORY OF OPERATION

Ultrasonic ranging entails transmitting a sound wave

and measuring the time that it takes for the sound wave

to reﬂect off of an object and back to the origin. The

reﬂection time is proportional to the distance that the

object is from the source. In this implementation, the

sound wave is transmitted and received from the same

transducer. Therefore, a blanking interval is required

between signal transmission and reception to eliminate

false echoes (i.e., a transmitted signal being detected

as its own echo).

Implementing Ultrasonic Ranging

Robert Schreiber

Microchip Technology Inc.

INTRODUCTION

Object ranging is essential in many types of systems.

One of the most popular ranging techniques is

ultrasonic ranging. Ultrasonic ranging is used in a wide

variety of applications including:

•

Autofocus cameras

Motion detection

Robotics guidance

Proximity sensing

Object ranging

CIRCUIT CONFIGURATION

In this implementation, a PIC16C74 is connected to the

ranging module as shown in Figure 1. The RE0 and

RE1 I/O pins are conﬁgured as digital outputs and are

tied to INIT and BINH, respectively. The CCP1 pin is

conﬁgured as a digital input and is tied to ECHO

through a pull-up resistor. The pull-up resistor is

needed since the ECHO signal is an open-collector

output. The CCP1 pin is conﬁgured for capture mode

(CCP1CON). Figure 2 shows the timing relationship for

and the three signal lines (INIT, BINH, and ECHO).

Note:

The ranging module requires 5.0 millisec-

onds to stabilize during power-up.

This application note describes a method of interfacing

PIC16CXXX microcontrollers to the Polaroid 6500

Ranging Module.

This implementation uses a

minimum of microcontroller resources, a CCP module

and two I/O pins. The two major components of the

system are:

• Microcontroller

• Polaroid 6500 Ranging Module

The microcontroller performs the intelligence and

arithmetic functions for ultrasonic ranging, while the

Polaroid 6500 Ranging Module performs the ultrasonic

signal transmissions and echo detection.

FIGURE 1:

RANGING MODULE INTERFACE

RE1

RE0

CCP1

BINH

INIT

TRANSMIT

ECHO

POLAROID 6500 RANGING MODULE

TRANSDUCER

PIC16C74

1997 Microchip Technology Inc.

DS00597B-page 1

PIC16LC74-04I/JW Related Products

	PIC16LC74-04I/JW	PIC16C74T-10/P	PIC16LC74-04/P	PIC16LC74T-04/L	PIC16C74T-20/L	PIC16LC74T-04I/JW
Description	8-BIT, UVPROM, 4 MHz, RISC MICROCONTROLLER, CDIP40, 0.600 INCH, WINDOWED, CERDIP-40	8-BIT, OTPROM, 10 MHz, RISC MICROCONTROLLER, PDIP40, 0.600 INCH, PLASTIC, DIP-40	8-BIT, MROM, 4 MHz, RISC MICROCONTROLLER, PDIP40, 0.600 INCH, PLASTIC, DIP-40	8-BIT, MROM, 4 MHz, RISC MICROCONTROLLER, PQCC44, PLASTIC, LCC-44	8-BIT, MROM, 20 MHz, RISC MICROCONTROLLER, PQCC44, PLASTIC, LCC-44	8-BIT, UVPROM, 4 MHz, RISC MICROCONTROLLER, CDIP40, 0.600 INCH, WINDOWED, CERDIP-40
Parts packaging code	DIP	DIP	DIP	LCC	LCC	DIP
package instruction	WDIP, DIP40,.6	DIP,	DIP, DIP40,.6	QCCJ, LDCC44,.7SQ	PLASTIC, LCC-44	0.600 INCH, WINDOWED, CERDIP-40
Contacts	40	40	40	44	44	40
Reach Compliance Code	compliant	unknown	compliant	compliant	unknown	compliant
Has ADC	YES	YES	YES	YES	YES	YES
bit size	8	8	8	8	8	8
maximum clock frequency	4 MHz	10 MHz	4 MHz	4 MHz	20 MHz	4 MHz
DAC channel	NO	NO	NO	NO	NO	NO
DMA channel	NO	NO	NO	NO	NO	NO
JESD-30 code	R-GDIP-T40	R-PDIP-T40	R-PDIP-T40	S-PQCC-J44	S-PQCC-J44	R-GDIP-T40
Number of I/O lines	33	33	33	33	33	33
Number of terminals	40	40	40	44	44	40
Maximum operating temperature	85 °C	70 °C	70 °C	70 °C	70 °C	85 °C
PWM channel	YES	YES	YES	YES	YES	YES
Package body material	CERAMIC, GLASS-SEALED	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	CERAMIC, GLASS-SEALED
encapsulated code	WDIP	DIP	DIP	QCCJ	QCCJ	DIP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	SQUARE	SQUARE	RECTANGULAR
Package form	IN-LINE, WINDOW	IN-LINE	IN-LINE	CHIP CARRIER	CHIP CARRIER	IN-LINE
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
ROM programmability	UVPROM	OTPROM	MROM	OTPROM	MROM	UVPROM
speed	4 MHz	10 MHz	4 MHz	4 MHz	20 MHz	4 MHz
Maximum supply voltage	6 V	6 V	6 V	6 V	5.5 V	6 V
Minimum supply voltage	3 V	4 V	3 V	3 V	4.5 V	3 V
surface mount	NO	NO	NO	YES	YES	NO
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	INDUSTRIAL
Terminal form	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	J BEND	J BEND	THROUGH-HOLE
Terminal location	DUAL	DUAL	DUAL	QUAD	QUAD	DUAL
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC
Is it lead-free?	Lead free	-	Lead free	Lead free	-	Lead free
Is it Rohs certified?	conform to	-	conform to	conform to	-	conform to
Maker	Microchip	-	Microchip	Microchip	Microchip	Microchip
CPU series	PIC	-	PIC	PIC	PIC	-
JESD-609 code	e3	-	e3	e3	-	e3
length	52.07 mm	-	51.689 mm	16.5862 mm	16.5862 mm	-
Encapsulate equivalent code	DIP40,.6	-	DIP40,.6	LDCC44,.7SQ	LDCC44,.7SQ	-
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	-	NOT SPECIFIED	245	-	NOT SPECIFIED
power supply	3.3/5 V	-	3.3/5 V	5 V	5 V	-
RAM (bytes)	192	-	192	192	192	192
rom(word)	4096	-	4096	4096	4096	4096
Maximum seat height	5.715 mm	-	5.08 mm	4.572 mm	4.572 mm	-
Maximum slew rate	3.8 mA	-	3.8 mA	3.8 mA	30 mA	3.8 mA
Nominal supply voltage	5 V	-	5 V	5 V	5 V	-
Terminal surface	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)	-	MATTE TIN
Terminal pitch	2.54 mm	-	2.54 mm	1.27 mm	1.27 mm	-
Maximum time at peak reflow temperature	NOT SPECIFIED	-	NOT SPECIFIED	40	-	NOT SPECIFIED
width	15.24 mm	-	15.24 mm	16.5862 mm	16.5862 mm	-
Base Number Matches	1	1	1	1	-	-

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