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DS1982U, DS1985U
UniqueWare™ iButton®
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Status
| Part Number |
Status |
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DS1982U
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This product is No Longer Available. |
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DS1985U
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This product is No Longer Available. |
Description
UniqueWare iButtons are factory-programmed versions of the DS1982 (1024 bit) and the DS1985 (16Kb) Add-Only iButtons, respectively. They differ from the regular devices in their custom ROM family codes (see Ordering Information) and the UniqueWare Identifier 5E7h in place of the upper 12 bits of the standard serialization field. For technical details on the devices, refer to the DS1982 and DS1985 data sheets..
UniqueWare Add-Only iButtons are only available preprogrammed with customer-specific and write-protected data. UniqueWare data fills at least one but no more than the first two pages of a device, depending on the length of the customer-supplied data.
UniqueWare devices are only available to existing customers. New data patterns are no longer accepted. The minimum order quantity (MOQ) is 34,000 pieces with higher quantities available in multiples of 17,000 pieces. UniqueWare iButtons can only be purchased in bulk form, delivered in bags. The shipment quantity can be plus or minus 10% of the order quantity. Only the quantity shipped will be billed.
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Data Sheet
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Key Features
- 1024 bits or 64kbits electrically programmable read only memory (EPROM) communicates with the economy of one signal plus ground
- Unique, factory lasered and tested 64-bit registration number (8-bit family code, 36-bit serialization, 12-bit UniqueWare identifier 5E7h, 8-bit CRC tester) assures absolute traceability because no two parts are alike
- EPROM partitioned into 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
- Reduces control, address, data, power and programming signals to a single pin
- 8-bit family code specifies device communications requirements to reader
- Presence detector acknowledges when reader first applies voltage
- Reads over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C
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Key Specifications:
| iButton Products |
| Part Number |
Applications |
Memory Type |
Memory Size |
Unique Ware |
Real Time Clock |
Budgetary Price |
| See Notes |
| DS1982U |
Asset Management |
EPROM |
1K bits |
Yes |
No |
- |
| DS1985U |
16K bits |
- |
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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
| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS1982U-1118+A04
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N/A |
No Longer Available |
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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| DS1982U-1119+A04
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N/A |
No Longer Available |
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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| DS1982U-1151+A04
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N/A |
No Longer Available |
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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| DS1982U-A0B-116D+
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N/A |
No Longer Available |
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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| DS1982U-F3-1166+
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N/A |
No Longer Available |
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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| DS1982U-F3-1177+
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N/A |
No Longer Available |
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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| DS1982U-F5+118A
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N/A |
No Longer Available |
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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| DS1982U-F5-1168+
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N/A |
No Longer Available |
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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| DS1982U-F5-1181+
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N/A |
No Longer Available |
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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| DS1985U-F5-117D+
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N/A |
No Longer Available |
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.: 19-5070
Rev 2;
2009-12-23
This page last modified: 2011-02-10
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