DS24B33Q+T&R - 4Kb 1-Wire EEPROM, 6-TDFN | Maxim Integrated
MPN: DS24B33Q+T&R ✓ فعالDS24B33Q+T&R جائزہ
A 1-Wire EEPROM is a non-volatile memory device that uses Maxim's proprietary single-wire half-duplex protocol, requiring only one data line plus ground for communication and power. The bus topology typically supports multiple devices in parallel and provides parasitic-power capability, which is why 1-Wire parts (EEPROM, temperature sensors, secure authenticators) dominate identification, calibration-token, board-registration, and anti-counterfeiting use cases.
Key features of the DS24B33 include 4 Kbit density (16 pages x 256 bits), a 32-byte scratchpad for write verification before commit-to-EEPROM copy, open-drain 1-Wire I/O with internal pull-up equivalent, 40-year data retention typical, and industrial -40C to +85C operating range. The 6-TDFN-EP package provides low-profile 3x3 mm PCB real estate and a thermal pad for stable mass-attach reflow.
Internally, the DS24B33 follows the standard 1-Wire state-machine protocol: RESET, presence pulse, ROM/function command, then read/write to the scratchpad and EEPROM array. The 64-bit unique ROM ID is split into 1-byte family code (0x23 for this part), 48-bit serial number, and 8-bit CRC. The device is targeted at consumables authentication, PCB ID tagging, and small-parameter storage in industrial/embedded systems.
Typical applications include PCB identification and serialization, consumables authentication (medical, printing, industrial fluids), iButton-style accessory detection, calibration-data storage, and board-revision tracking. The exposed-pad package also supports solder-probe programming during manufacturing test.
When designing with the DS24B33, observe the 1-Wire timing budget (reset/presence/slot windows defined by the protocol) and choose the master pull-up strength to satisfy the rise-time spec at the maximum expected bus capacitance. Industrial-grade buses (2+) need a strong pull-up after RESET to deliver adequate recovery time on long stubs.
کے لیے ڈراپ اِن متبادل DS24B33Q+T&R — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں DS24B33Q+T&R (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Interface, Memory Organization, Memory Type, Mounting Type, Operating Temperature.
DS24B33Q+
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
DS24B33S+
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
DS24B33+
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →DS24B33+
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →DS2431+
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
DS24B33Q+T&R زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| میموری ٹائپ | Non-volatile EEPROM (1-Wire) |
| میموری سائز | 4 Kbit (4096 bits) |
| Memory Organization | 16 pages x 256 bits |
| Scratchpad Size | 32 bytes |
| انٹرفیس | 1-Wire (single-conductor) |
| Write Cycle Time | 2 us (scratchpad, typical) |
| Operating Voltage | 3.3 V / 5 V |
| Unique ID | 64-bit factory-programmed ROM ID |
| Data Retention | 40 years (typical) |
| پیکیج | 6-TDFN (3x3 mm) with Exposed Pad |
| ماؤنٹنگ ٹائپ | Surface Mount |
| آپریٹنگ درجہ حرارت | -40 C to +85 C |
| MSL لیول | 1 (data undisclosed in sources) |
| RoHS اسٹیٹس | Compliant |
| Family Code | 0x23 (1-Wire) |
DS24B33Q+T&R پن کنفیگریشن
| پن 1 | NC — Not connected (per datasheet) |
| پن 2 | NC — Not connected (per datasheet) |
| پن 3 | GND — Ground reference |
| پن 4 | DQ — 1-Wire data input/output (open-drain, with external pull-up) |
| پن 5 | NC — Not connected (per datasheet) |
| پن 6 | NC — Not connected (per datasheet) |
| پن EP | EP — Exposed thermal pad - tie to GND for thermal dissipation |
عام استعمالات
DS24B33Q+T&R کے لیے موزوں ہے 6 ایپلیکیشنs: PCB Identification and Serialization, Consumables Authentication, Calibration-Data Storage, iButton-Style Accessory Detection, Board-Revision Tracking, Medical-Device Accessory Authentication.
PCB Identification and Serialization
The DS24B33Q+T&R's 4 Kbit density and factory-locked 64-bit ROM ID make it a strong fit for PCB identification, board-revision tracking, and MAC/serial storage in production-line environments. The 32-byte scratchpad supports commit-then-copy write semantics so a host can verify a full page before it lands in the EEPROM array, eliminating partial-write corruption on noisy factory floors. With -40 C to +85 C industrial operation and 40-year retention, the part outlasts typical product service life. Bus parasitic-power operation lets a single GPIO drive the DQ line, removing a dedicated regulator rail.
تجویز کردہ
Consumables Authentication
The DS24B33Q+T&R is widely used in printer cartridges, medical consumables, and industrial-fluid containers to authenticate genuine accessories. The unique 64-bit ROM ID plus 4 Kbit user EEPROM stores certificates, lot codes, and refill counters that the host MCU verifies before enabling operation. Its 1-Wire single-pin interface keeps the consumable connector pin-count minimal, and the exposed-pad TDFN package supports reliable solder-probe programming during cartridge assembly. Open-drain DQ with internal pull-up equivalent simplifies host-side firmware.
تجویز کردہ
Calibration-Data Storage
The DS24B33Q+T&R's 16-page x 256-bit organization maps naturally to calibration-curve, sensor-trim, and gain-offset records for industrial sensors and modules. A 32-byte scratchpad lets a host write, CRC-check, then commit a complete calibration block, which is critical when the sensor is being programmed during end-of-line test. With 40-year data retention and -40 C to +85 C range, calibration survives harsh field conditions including automotive and outdoor industrial deployments. The 6-TDFN-EP footprint fits in tight sensor-module PCBs.
تجویز کردہ
iButton-Style Accessory Detection
The DS24B33Q+T&R operates on the same 1-Wire bus as Maxim's iButton family, making it suitable as an accessory-detection token when full iButton mechanical form-factor is not required. Its factory ROM ID lets the host distinguish between authorized accessories and unauthorized substitutes; the user EEPROM stores accessory parameters, firmware rev, or expiry data. The exposed-pad TDFN supports SMD assembly on accessory PCBs, and the parasitic-power mode means the accessory needs only a single contact pin plus ground.
تجویز کردہ
Board-Revision Tracking
The DS24B33Q+T&R stores board-revision codes, BOM hashes, and manufacturing-test logs on every PCB, enabling traceability through the supply chain and field-service history. The 4 Kbit density covers multiple revision entries plus a manufacturing-data block, and the 64-bit ROM ID is unique enough to identify individual boards across millions of units. With 40-year retention and industrial temperature range, the part survives long product field life without service degradation, and the small 6-TDFN footprint adds negligible board area.
تجویز کردہ
Medical-Device Accessory Authentication
The DS24B33Q+T&R is well-suited to medical-device accessory authentication where disposables (single-use sensors, tubing sets, electrodes) must be verified before use. The 4 Kbit user area holds batch records, sterilization-cycle counters, and certificate data, and the unique ROM ID guarantees traceability. With -40 C to +85 C operation and 40-year data retention, the EEPROM meets medical-device shelf-life requirements. The exposed-pad TDFN package supports reliable sterilization-process assembly and surface-mount integration into disposable accessory PCBs.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا DS24B33Q+T&R — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | DS24B33Q+ | DS24B33S+ | DS24B33+ | DS24B33 | DS2431+ |
|---|---|---|---|---|---|---|
| Package | 6-TDFN (3x3 mm) EP | 6-TDFN (3x3 mm) EP - same | 8-SOIC (5.30 mm) - different footprint | 6-TDFN (3x3 mm) EP - same | 6-TDFN (3x3 mm) EP - same | 6-TSOC - different but adjacent family |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Memory Density | 4 Kbit | 4 Kbit | 4 Kbit | 4 Kbit | 4 Kbit | 1 Kbit (-75%) |
| Interface | 1-Wire | 1-Wire | 1-Wire | 1-Wire | 1-Wire | 1-Wire |
| Unique ROM ID | Yes (64-bit) | Yes (64-bit) | Yes (64-bit) | Yes (64-bit) | Yes (64-bit) | Yes (64-bit) |
| Operating Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 2.8 V to 5.25 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Data Retention (typ) | 40 years | 40 years | 40 years | 40 years | 40 years | 40 years |
اہم امتیازی خصوصیات
- Higher density 4 Kbit in same 6-TDFN-EP package as 1-Wire EEPROM family (بمقابلہDS2431+)
- Surface-mount 6-TDFN-EP package supports modern SMT reflow (بمقابلہDS24B33S+ (8-SOIC))
- 32-byte scratchpad for verified commit-then-copy write semantics (بمقابلہI2C EEPROMs (e.g., AT24C32 family))
ڈیزائن نوٹس
Place the DS24B33Q+T&R close to the 1-Wire bus connector and keep the DQ trace away from high-frequency switching nodes. The 6-TDFN-EP exposed pad must be soldered to a contiguous ground pour to meet thermal and electrical performance. A 4.7 kohm pull-up to the host VPUP rail (3.3V or 5V) is typical; rise-time on the DQ line must satisfy the 1-Wire spec at maximum expected bus capacitance (typically 1 us for short stubs, up to 15 us for long multi-drop buses).
Do not omit the external pull-up on DQ - the 1-Wire protocol requires the master to drive the bus high during recovery. Avoid mixing 1-Wire devices with different VPUP tolerances on the same bus segment without a level shifter. Verify the family code 0x23 when polling the ROM ID; mismatched family codes typically indicate an unsupported device on the bus. The scratchpad-commit pattern must be observed exactly: write scratchpad, read-back CRC, then COPY to EEPROM - skipping the read-back risks silent corruption.
Long 1-Wire stubs (greater than approximately 5 meters total bus length) require careful impedance management; place a stronger pull-up (1-2.2 kohm) and consider a 'stretch' reset waveform on the master side. Multi-drop buses need a unique 64-bit ID per device - the DS24B33Q+T&R's factory-programmed ID satisfies this out of the box. Bus recovery time after a strong pull-up RESET must be observed before any subsequent slot; refer to the DS24B33 datasheet timing diagram for the exact window.
تعمیل کی معلومات
RoHS compliance confirmed per PartGenie and distributor listings (Y). REACH, halogen-free, and conflict-minerals status not explicitly stated in the provided data - set to unknown pending manufacturer disclosure. AEC-Q100 not applicable - this is a memory IC, not automotive-qualified.
