Datasheet > V4082

V4082

更新时间： 2024-01-22 12:05:42

品牌	Logo	应用领域
EMMICRO		/
页数	文件大小	规格书
7页	174K
描述
Identification ROM

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中文翻译

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数据手册

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V4082 数据手册

EM MICROELECTRONIC - MARIN SA

V4082

Identification ROM

Description

Features

The V4082 is a 64-bit read only memory (ROM) which

contains a unique laser engraved serial number. The

data in the ROM is partitioned into three sections: An 8-

bit identifier code, a 48-bit serial number and an 8-bit

cyclical redundancy check (CRC). The serial number is

incremented in fabrication such that no two parts have the

same code. Communication for reading and writing is

done serially via a single data lead (and ground return)

using a single wire protocol. Power for reading is derived

from the data line itself with no need for an extra power

source. The circuit is available in SOT 223 or TO 92

package.

Unique 48-bit silicon serial number gives 10¹⁴

combinations

Factory lasered and tested, no two parts alike

8-bit cyclic redundancy check ensures error-free reading

Presence detect indicates to the system when first

contact is made

Zero standby power required

Custom serial numbers available

Pin compatible with DS 2400, DS 2401 in TO-92 and

SOT-223

Applications

Socket identification

PCB identification

Equipment registration

Typical Operating Configuration

Pin Assignment

TO - 9 2

SOT-223

Vcc

View

Fla t Fro n t

R_PUP

V4082

on chip supply

2 3

V4082

DATA

VSS

Control

Logic

+ ROM

100 ohm

MOSFET

Cext

SYSTEM

V4082

Fig. 1

Name

Function

TO92

SOT-223

VSS

DATA

Ground return

Serial data pin

VSS

Ground return

* Internally connected to pin 2

Fig. 2

www.emmicroelectronic.com

12 3 4 5 6 7

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