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DS1977
Password-Protected 32KB EEPROM iButton
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Status
Description
The DS1977 is a 32KB EEPROM in a rugged iButton® enclosure. Access to the memory can be password protected with different passwords for read-only and full access. Data is transferred serially through the 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1977 is factory lasered with a guaranteed unique 64-bit registration number that allows for absolute traceability. The durable stainless-steel iButton package is highly resistant to environmental hazards such as dirt, moisture, and shock. Accessories permit the DS1977 iButton to be mounted on almost any object, including containers, pallets, and bags.
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Data Sheet
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Key Features
SPECIAL FEATURES
- 32KB EEPROM Organized as Pages of 64 Bytes Each
- Optional Password Protection with Different 64-Bit Passwords for Read and Full Access
- Communicates to Host with a Single Digital Signal at Up to 15.3kbps at Standard Speed or Up to 125kbps in Overdrive Mode Using 1-Wire Protocol
- Operating Range: 2.8V to 5.25V, -40°C to +85°C
- Minimum 100k Write Cycles Endurance
- 15kV Built-in ESD Protection
COMMON iButton FEATURES
- Unique Factory-Lasered 64-Bit Registration Number Assures Error-Free Device Selection and Absolute Traceability Because No Two Parts are Alike
- Built-In Multidrop Controller for 1-Wire Net
- Chip-Based Data Carrier Stores Digital Identification and Information, Armored in a Durable Stainless-Steel Case
- Data can be Accessed While Affixed to Object
- Button Shape is Self-Aligning with Cup-Shaped Probes
- 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
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Applications/Uses
- Audit Data Storage and Carrier
- Health Data Carrier
- Maintenance/Inspection Data Storage
- Medical Data Carrier
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Key Specifications:
| iButton Products |
| Part Number |
Applications |
Memory Type |
Memory Size |
Security Features |
Unique Ware |
Real Time Clock |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max w/pins |
See Notes |
| DS1977 |
Asset Management |
EEPROM |
32K Bytes |
Password Protected |
No |
No |
301 |
$7.03 @1k |
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See All iButton Products (26)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Notes |
Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS1977-F5
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F5 MicroCan |
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N/A |
No Longer Available |
DS1977-F5+
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CAN-F5;2 pin;301 mm²
Outline Drawing:21-0266 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: IB-5NB*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS1977-F5#
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Active |
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CAN-F5;2 pin;301 mm²
Outline Drawing:21-0266 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: IB#5NC1*
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-40°C to +85°C
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RoHS/Lead-Free: RoHS Qualified
Materials Analysis |
| DS1977-F5+
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N/A |
No Longer Available |
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CAN;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-4890
Rev 4;
2009-12-03
This page last modified: 2011-02-09
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