HD1-4702/883 Intersil Corporation, HD1-4702/883 Datasheet

HD1-4702/883

Manufacturer Part Number

HD1-4702/883

Description

Manufacturer

Intersil Corporation

Datasheet

1.HD1-4702883.pdf (8 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

HD1-4702/883

Manufacturer:

INTERS

Quantity:

940

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Download datasheet (84Kb)

June 1998

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207

Features

• This Circuit is Processed in Accordance to MIL-STD-883

• HD-4702/883 Provides 13 Commonly Used Bit Rates

• Uses a 2.4576MHz Crystal/Input for Standard

• Low Power Dissipation

• Conforms to ElA RS-404

• One HD-4702/883 Controls up to Eight Transmission

• Initialization Circuit Facilitates Diagnostic Fault

• On-Chip Input Pull-Up Circuit

Ordering Information

Pinout

HD1-4702/883

and is Fully Conformant Under the Provisions of

Paragraph 1. 2. 1.

Frequency Output (16 Times Bit Rate)

Channels

Isolation

NUMBER

PART

TEMPERATURE

RANGE (

-55 to 125

CERDIP

PACKAGE

Intersil Corporation 1999

F16.3

GND

PKG. NO.

HD-4702/883 (CERDIP)

TOP VIEW

CMOS Programmable Bit Rate Generator

Description

The HD-4702/883 Bit Rate Generator provides the

necessary clock signals for digital data transmission sys-

tems, such as a UART. It generates 13 commonly used bit

rates using an on-chip crystal oscillator or an external input.

For conventional operation generating 16 output clock

pulses per bit period, the input clock frequency must be

2.4576MHz (i.e., 9600 Baud x 16 x 16, since there is an

internal

a proportionally lower output frequency.

The HD-4702/883 can provide multi-channel operation with

a minimum of external logic by having the clock frequency

externally. All signals have a 50% duty cycle except 1800

Baud, which has less than 0.39% distortion.

The four rate select inputs (S

the output (Z). See Truth Table for Rate Select Inputs for

select code and output bit rate. Two of the 16 select codes

for the HD-4702/883 do not select an internally generated

frequency, but select an input into which the user can feed

either a different frequency, or a static level (High or Low) to

generate “ZERO BAUD”.

The bit rates most commonly used in modern data terminals

(110,150, 300,1200, 2400 Baud) require that no more than

one input be grounded for the HD-4702/883, which is easily

achieved with a single 5-position switch.

The HD-4702/883 has an initialization circuit which

generates a master reset for the scan counter. This signal is

derived from a digital differentiator that senses the ﬁrst high

level on the C

high level on C

Modes and Initialization below.

HD-4702/883

and the

is high, selecting the crystal input, C

16 prescaler). A lower input frequency will result in

8 prescaler outputs Q

input after the E

would apply a continuous reset. See Clock

-S

) select which bit rate is at

input goes low. When

File Number

, Q

must be low. A

, Q

available

2955.2

Related parts for HD1-4702/883

HD1-4702/883 Summary of contents

Page 1

... Initialization Circuit Facilitates Diagnostic Fault Isolation • On-Chip Input Pull-Up Circuit Ordering Information PART TEMPERATURE o NUMBER RANGE ( C) HD1-4702/883 -55 to 125 CERDIP Pinout CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | http://www.intersil.com or 407-727-9207 Copyright HD-4702/883 CMOS Programmable Bit Rate Generator ...

Page 2

Truth Table TRUTH TABLE FOR RATE SELECT INPUTS (Using 2.4576MHz Crystal OUTPUT RATE ( MUX Input ( MUX Input ( ...

Page 3

Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

TABLE 1. DC ELECTRICAL PERFORMANCE SPECIFICATIONS (Continued) Device Guaranteed and 100% Tested DC PARAMETER SYMBOL Supply Current I ECP = V CC (Static All Other Inputs = GND, (Note 5) ECP = All Other Inputs ...

Page 5

TABLE 3. ELECTRICAL PERFORMANCE SPECIFICATIONS AC PARAMETER SYMBOL Input Capacitance Output Capacitance Propagation Delay Propagation Delay Propagation Delay Propagation Delay ...

Page 6

Burn-In Circuit NOTES: 13 100kHz 10 F0/ F1/2., ... 14 10k , 1/4W, 10 5.5V 0.5V, GND = 0V 0.01 ...

Page 7

Die Characteristics DIE DIMENSIONS: 100 mils x 97 mils x 19 mils METALLIZATION: Type Thickness: 10kÅ - 12kÅ Metallization Mask Layout Q1 Q2 ECP CP OX HD-4702/883 GLASSIVATION: Type: SiO Thickness: 7kÅ - 9kÅ WORST CASE CURRENT ...

Page 8

... All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certiﬁcation. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reli- able. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

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