Datasheet DS2423 (Maxim)
| Hersteller | Maxim |
| Beschreibung | 4kbit 1-Wire RAM with Counter |
| Seiten / Seite | 26 / 1 — DS2423. 4kbit 1-Wire. RAM with Counter. FEATURES. PIN ASSIGNMENT. PIN … |
| Dateiformat / Größe | PDF / 633 Kb |
| Dokumentensprache | Englisch |
DS2423. 4kbit 1-Wire. RAM with Counter. FEATURES. PIN ASSIGNMENT. PIN DESCRIPTION. Functional Diagrams. ORDERING INFORMATION
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DS2423 4kbit 1-Wire RAM with Counter FEATURES
4096 bits of SRAM Compact, low cost 6-pin TSOC surface mount Four 32-bit, read-only counters package Active-low external trigger inputs for two of Reads, writes and counts over a wide voltage the counters with on-chip debouncing range of 2.8V to 5.5V from -40°C to +85°C compatible with reed and Wiegand switches Unique, factory-lasered and tested 64-bit
PIN ASSIGNMENT
registration number (8-bit family code + 48- TSOC PACKAGE bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are 1 6 2 5 alike 3 4 Memory partitioned into 16 256-bit pages in for packetizing data TOP VIEW 3.7mm x 4.0mm x 1.5mm 256-bit scratchpad with strict read/write protocols ensures integrity of data transfer On-chip 16-bit CRC generator for SIDE VIEW safeguarding data transfers
PIN DESCRIPTION
Built-in multidrop controller ensures Pin 1 Ground compatibility with other MicroLAN products Pin 2 Data Directly connects to a single port pin of a Pin 3 Vbat microprocessor and communicates at up to Pin 4 NC 16.3kbits per second Pin 5 Input channel B Overdrive mode boosts communication speed
Functional Diagrams
Pin 6 Input channel A to 142kbits per second 8-bit family code specifies device communication requirements to reader
ORDERING INFORMATION
Presence detector acknowledges when reader DS2423P 6-pin TSOC package first applies voltage DS2423P/T&R Tape & Reel Version of DS2423P DS2423P+ 6-pin TSOC package + Indicates lead-free compliance.
DESCRIPTION
The DS2423 1-Wire® RAM with Counters is a fully static, read/write memory for battery operation in a low-cost, six-lead TSOC, surface-mount package. The memory is organized as 16 pages of 256 bits each. In addition, the device has four counters, two of them with external trigger inputs called A and B. Each of the counters is associated with a memory page. A counter without external trigger input increments each
Not Recommended for New Design
time data is written to the page it is associated with (write cycle counter). The counters triggered by
Pin Configurations appear at end of data sheet.
inputs A and B, respectively, increment with every low-going pulse on their input. All counters are read-
Functional Diagrams continued at end of data sheet.
only. They are automatically cleared to 0 when the battery is connected. UCSP is a trademark of Maxim Integrated Products, Inc. 1-Wire is a registered trademark of Dallas Semiconductor Corp., a wholly owned subsidiary of Maxim Integrated Products Inc. 1 of For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 080207
DS2423 4kbit 1-Wire RAM with Counter FEATURES
4096 bits of SRAM Compact, low cost 6-pin TSOC surface mount Four 32-bit, read-only counters package Active-low external trigger inputs for two of Reads, writes and counts over a wide voltage the counters with on-chip debouncing range of 2.8V to 5.5V from -40°C to +85°C compatible with reed and Wiegand switches Unique, factory-lasered and tested 64-bit
PIN ASSIGNMENT
registration number (8-bit family code + 48- TSOC PACKAGE bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are 1 6 2 5 alike 3 4 Memory partitioned into 16 256-bit pages in for packetizing data TOP VIEW 3.7mm x 4.0mm x 1.5mm 256-bit scratchpad with strict read/write protocols ensures integrity of data transfer On-chip 16-bit CRC generator for SIDE VIEW safeguarding data transfers
PIN DESCRIPTION
Built-in multidrop controller ensures Pin 1 Ground compatibility with other MicroLAN products Pin 2 Data Directly connects to a single port pin of a Pin 3 Vbat microprocessor and communicates at up to Pin 4 NC 16.3kbits per second Pin 5 Input channel B Overdrive mode boosts communication speed
Functional Diagrams
Pin 6 Input channel A to 142kbits per second 8-bit family code specifies device communication requirements to reader
ORDERING INFORMATION
Presence detector acknowledges when reader DS2423P 6-pin TSOC package first applies voltage DS2423P/T&R Tape & Reel Version of DS2423P DS2423P+ 6-pin TSOC package + Indicates lead-free compliance.
DESCRIPTION
The DS2423 1-Wire® RAM with Counters is a fully static, read/write memory for battery operation in a low-cost, six-lead TSOC, surface-mount package. The memory is organized as 16 pages of 256 bits each. In addition, the device has four counters, two of them with external trigger inputs called A and B. Each of the counters is associated with a memory page. A counter without external trigger input increments each
Not Recommended for New Design
time data is written to the page it is associated with (write cycle counter). The counters triggered by
Pin Configurations appear at end of data sheet.
inputs A and B, respectively, increment with every low-going pulse on their input. All counters are read-
Functional Diagrams continued at end of data sheet.
only. They are automatically cleared to 0 when the battery is connected. UCSP is a trademark of Maxim Integrated Products, Inc. 1-Wire is a registered trademark of Dallas Semiconductor Corp., a wholly owned subsidiary of Maxim Integrated Products Inc. 1 of For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 080207