DS1986-F3 datasheet, PDF - EEWORLD Datasheet

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DS1986-F3: Description64K X 1 OTPROM, MADB2; Categorystorage storage; File Size548KB，27 Pages; ManufacturerDALLAS; Websitehttp://www.dalsemi.com

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DS1986-F3 Overview

64K X 1 OTPROM, MADB2

DS1986-F3 Parametric

Parameter Name	Attribute value
Maker	DALLAS
package instruction	, BUTTON,.68IN
Reach Compliance Code	unknow
Other features	MICROLAN COMPATIBLE
I/O type	COMMON
JESD-30 code	O-MADB-N2
memory density	65536 bi
Memory IC Type	OTP ROM
memory width	1
Number of functions	1
Number of terminals	2
word count	65536 words
character code	64000
Operating mode	ASYNCHRONOUS
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
organize	64KX1
Output characteristics	OPEN-DRAIN
Package body material	METAL
Encapsulate equivalent code	BUTTON,.68IN
Package shape	ROUND
Package form	DISK BUTTON
Parallel/Serial	SERIAL
power supply	3/5 V
Certification status	Not Qualified
Maximum supply voltage (Vsup)	6 V
Minimum supply voltage (Vsup)	2.8 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal form	NO LEAD
Terminal location	AXIAL

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DS1986

64-kbits Add-Only iButton

www.iButton.com

SPECIAL FEATURES

65536 bits Electrically Programmable Read

Only Memory (EPROM) communicates with

the economy of one signal plus ground

Overdrive mode boosts communication

speed to 142 kbits per second

EPROM partitioned into two hundred and 56

256-bit pages for randomly accessing

packetized data records

Each memory page can be permanently

write-protected to prevent tampering

Device is an “add only” memory where

additional data can be programmed into

EPROM without disturbing existing data

Architecture allows software to patch data by

superseding an old page in favor of a newly

programmed page

Reduces control, address, data, power, and

programming signals to a single data pin

8-bit family code specifies DS1986

communications requirements to reader

Reads over a wide voltage range of 2.8V to

6.0V from -40°C to +85°C; programs at

11.5V to 12.0V from -40°C to +85°C

Unique, factory-lasered and tested 64-bit

registration number (8-bit family code +

48-bit serial number + 8-bit CRC tester)

assures absolute traceability because no two

parts are alike

COMMON iButton FEATURES

Multidrop controller for MicroLAN

Digital identification and information by

momentary contact

Chip-based data carrier compactly stores

information

Data can be accessed while affixed to object

Economically communicates to bus master

with a single digital signal at 16.3 kbits per

second

Standard 16 mm diameter and 1-Wire

protocol ensure compatibility with iButton

family

Button shape is self-aligning with cup-

shaped probes

Durable stainless steel case engraved with

registration number withstands harsh

environments

Easily affixed with self-stick adhesive

backing, latched by its flange, or locked with

a ring pressed onto its rim

Presence detector acknowledges when reader

first applies voltage

Meets UL#913 (4th Edit.); Intrinsically Safe

Apparatus, Approved under Entity Concept

for use in Class I, Division 1, Group A, B, C

and D Locations (application pending)

F3 MICROCAN

3.10

0.36

0.51

1993

F5 MICROCAN

5.89

0.36

16.25

0.51

1993

16.25

YYWW REGISTERED RR

17.35

000000FBC52B

000000FBD8B3

DATA

GROUND

DATA

GROUND

All dimensions shown in millimeters.

1 of 27

011800

DS1986

ORDERING INFORMATION

DS1986-F3

DS1986-F5

F3 MicroCan

F5 MicroCan

EXAMPLES OF ACCESSORIES

DS9096P

DS9101

DS9093RA

DS9093F

DS9092

Self-Stick Adhesive Pad

Multi-Purpose Clip

Mounting Lock Ring

Snap-In Fob

iButton Probe

iButton DESCRIPTION

The DS1986 64-kbit Add-Only iButton is a rugged read/write data carrier that identifies and stores

relevant information about the product or person to which it is attached. This information can be accessed

with minimal hardware, for example a single port pin of a microcontroller. The DS1986 consists of a

factory-lasered registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an

8-bit Family Code (0Fh) plus 64 kbit of EPROM which is user-programmable. The power to program and

read the DS1986 is derived entirely from the 1-Wire communication line. Data is transferred serially via

the 1-Wire protocol which requires only a single data lead and a ground return. The entire device can be

programmed and then write-protected if desired. Alternatively, the part may be programmed multiple

times with new data being appended to, but not overwriting, existing data with each subsequent

programming of the device. Note: Individual bits can be changed only from a logical 1 to a logical 0,

never from a logical 0 to a logical 1. A provision is also included for indicating that a certain page or

pages of data are no longer valid and have been replaced with new or updated data that is now residing at

an alternate page address. This page address redirection allows software to patch data and enhance the

flexibility of the device as a standalone database. The 48-bit serial number that is factory-lasered into

each DS1986 provides a guaranteed unique identity which allows for absolute traceability. The durable

MicroCan package is highly resistant to harsh environments such as dirt, moisture, and shock. Its compact

button-shaped profile is self-aligning with cup-shaped receptacles, allowing the DS1986 to be used easily

by human operators or automatic equipment. Accessories permit the DS1986 to be mounted on printed

circuit boards, plastic key fobs, photo-ID badges, ID bracelets, and many other objects. Applications

include work-in-progress tracking, electronic travelers, access control, storage of calibration constants,

and debit tokens.

OVERVIEW

The block diagram in Figure 1 shows the relationships between the major control and memory sections of

the DS1986. The DS1986 has three main data components: 1) 64-bit lasered ROM, 2) 65536 bits

EPROM Data Memory, and 3) 2816 bits EPROM Status Memory. The device derives its power for read

operations entirely from the 1-Wire communication line by storing energy on an internal capacitor during

periods of time when the signal line is high and continues to operate off of this “parasite” power source

during the low times of the 1-Wire line until it returns high to replenish the parasite (capacitor) supply.

During programming, 1-Wire communication occurs at normal voltage levels and then is pulsed

momentarily to the programming voltage to cause the selected EPROM bits to be programmed. The 1-

Wire line must be able to provide 12 volts and 10 milliamperes to adequately program the EPROM

portions of the part. Whenever programming voltages are present on the 1-Wire line a special high

voltage detect circuit within the DS1986 generates an internal logic signal to indicate this condition. The

hierarchical structure of the 1-Wire protocol is shown in Figure 2. The bus master must first provide one

of the six ROM Function Commands, 1) Read ROM, 2) Match ROM, 3) Search ROM, 4) Skip ROM, 5)

Overdrive-Skip ROM, or 6) Overdrive-Match ROM. Upon completion of an Overdrive ROM command

byte executed at regular speed, the device will enter the Overdrive mode where all subsequent

communication occurs at a higher speed. These commands operate on the 64-bit lasered ROM portion of

each device and can singulate a specific device if many are present on the 1-Wire line as well as indicate

to the bus master how many and what types of devices are present. The protocol required for these ROM

2 of 27

DS1986

Function Commands is described in Figure 8. After a ROM Function Command is successfully executed,

the memory functions that operate on the EPROM portions of the DS1986 become accessible and the bus

master may issue any one of the five Memory Function Commands specific to the DS1986 to read or

program the various data fields. The protocol for these Memory Function Commands is described in

Figure 5. All data is read and written least significant bit first.

64-BIT LASERED ROM

Each DS1986 contains a unique ROM code that is 64 bits long. The first eight bits are a 1-Wire family

code. The next 48 bits are a unique serial number. The last eight bits are a CRC of the first 56 bits. (See

Figure 3.) The 64-bit ROM and ROM Function Control section allow the DS1986 to operate as a 1-Wire

device and follow the 1-Wire protocol detailed in the section “1-Wire Bus System”. The memory

functions required to read and program the EPROM sections of the DS1986 are not accessible until the

ROM function protocol has been satisfied. This protocol is described in the ROM functions flow chart

(Figure 8). The 1-Wire bus master must first provide one of six ROM function commands: 1) Read ROM,

2) Match ROM, 3) Search ROM, or 4) Skip ROM, 5) Overdrive-Skip ROM, or 6) Overdrive-Match

ROM. After a ROM function sequence has been successfully executed, the bus master may then provide

any one of the memory function commands specific to the DS1986 (Figure 5).

The 1-Wire CRC of the lasered ROM is generated using the polynomial X

+ X

+ 1. Additional

information about the Dallas Semiconductor 1-Wire Cyclic Redundancy Check is available in the Book

of DS19xx iButton Standards. The shift register acting as the CRC accumulator is initialized to zero.

Then starting with the least significant bit of the family code, one bit at a time is shifted in. After the

eighth bit of the family code has been entered, then the serial number is entered. After the 48th bit of the

serial number has been entered, the shift register contains the CRC value. Shifting in the eight bits of

CRC should return the shift register to all zeroes.

3 of 27

DS1986-F3 Related Products

	DS1986-F3	DS1986	DS1986-F5
Description	64K X 1 OTPROM, MADB2	64K X 1 OTPROM, MEDB2	64K X 1 OTPROM, MEDB2
memory width	1	1	1
Number of functions	1	1	1
Number of terminals	2	2	2
Maximum operating temperature	85 °C	85 Cel	85 °C
Minimum operating temperature	-40 °C	-40 Cel	-40 °C
organize	64KX1	64K X 1	64KX1
surface mount	YES	Yes	YES
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	NO LEAD	NO LEAD	NO LEAD
Terminal location	AXIAL	END	AXIAL
Maker	DALLAS	-	DALLAS
package instruction	, BUTTON,.68IN	-	, BUTTON,.68IN
Reach Compliance Code	unknow	-	unknow
Other features	MICROLAN COMPATIBLE	-	MICROLAN COMPATIBLE
I/O type	COMMON	-	COMMON
JESD-30 code	O-MADB-N2	-	O-MADB-N2
memory density	65536 bi	-	65536 bi
Memory IC Type	OTP ROM	-	OTP ROM
word count	65536 words	-	65536 words
character code	64000	-	64000
Operating mode	ASYNCHRONOUS	-	ASYNCHRONOUS
Output characteristics	OPEN-DRAIN	-	OPEN-DRAIN
Package body material	METAL	-	METAL
Encapsulate equivalent code	BUTTON,.68IN	-	BUTTON,.68IN
Package shape	ROUND	-	ROUND
Package form	DISK BUTTON	-	DISK BUTTON
Parallel/Serial	SERIAL	-	SERIAL
power supply	3/5 V	-	3/5 V
Certification status	Not Qualified	-	Not Qualified
Maximum supply voltage (Vsup)	6 V	-	6 V
Minimum supply voltage (Vsup)	2.8 V	-	2.8 V
Nominal supply voltage (Vsup)	5 V	-	5 V
technology	CMOS	-	CMOS

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