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Analog Devices Inc./Maxim Integrated DS1233D-5/T&R
- Part No.:
- DS1233D-5/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
DS1233D-5/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,728
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Product details
Overview
DS1233D-5/T&R from Maxim Integrated (now Analog Devices) is a 5V microprocessor supervisory circuit with precision voltage monitoring, 350 ms reset pulse width, and ±5% VCC trip point (4.5–4.75 V). It provides power-fail detection and reset assertion for Motorola 68XXX and HC16 microprocessors in embedded control systems.
For engineers reviewing the DS1233D-5/T&R datasheet, DS1233D-5/T&R pinout, DS1233D-5/T&R application, or DS1233D-5/T&R equivalent, key selection factors include guaranteed 350 ms reset timeout, internal 5 kΩ pull-up resistor, -40°C to +85°C operation, SOT-223 package compatibility, and precise 5% supply threshold detection.
Technical Context
The DS1233D-5/T&R integrates a temperature-compensated voltage reference and comparator to monitor VCC against a fixed 5% tolerance band. It asserts an active-low RESET signal on power failure or undervoltage, holding it active for 250–450 ms (typ. 350 ms) after VCC returns to specification.
Its internal 5 kΩ pull-up resistor eliminates external components for open-drain reset signaling. The device operates across full industrial temperature range (-40°C to +85°C) and supports fast VCC slew rate detection (tRPD = 100 ns), enabling reliable reset timing in noisy or rapidly varying supply environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.5 V (min) to 4.75 V (max); ensures reset activation before 5V supply drops below system stability margin |
| Reset Active Time | 250–450 ms (typ. 350 ms); guarantees sufficient stabilization time for microprocessor and power rails post-power-up |
| Supply Voltage Range | 1.2 V to 5.5 V; supports operation during brown-out and wide-input transient conditions |
| Output Drive | 8 mA sink at 0.4 V; directly interfaces with standard TTL/CMOS reset inputs without external buffer |
| Operating Temperature | -40°C to +85°C; validated for industrial-grade embedded applications without derating |
| Internal Pull-Up | 3.75–6.25 kΩ; eliminates need for external pull-up resistor on RESET line |
| Power Supply Rejection | Immune to VCC slew rates down to 300 µs (4.75 V → 4.00 V); prevents false resets during supply transients |
Pinout & Package
SOT-223 surface-mount package with 4-pin configuration (pin 4 = GROUND). Compatible with TO-92 through-hole variant but not pin-compatible due to different pin count and layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 | GROUND | Primary reference node for internal comparator and reset driver; must be low-impedance connection to system ground plane |
| PIN 2 | RESET (active-low open-drain) | Drives microprocessor reset input low; requires external pull-up if interfacing with non-5V-tolerant logic |
| PIN 3 | VCC | Monitored power rail input; supplies internal reference and logic; decoupling capacitor required per layout guidelines |
| PIN 4 | GROUND (SOT-223 only) | Thermal and electrical ground pad; improves thermal dissipation and noise immunity in SOT-223 mounting |
Key Features
| Feature | Design Value |
|---|---|
| Precision 5% VCC threshold | Guarantees reset assertion before 5V supply falls below 4.5 V - critical for stable microcontroller boot sequencing |
| 350 ms reset timeout (typ.) | Ensures microprocessor clocks, PLLs, and peripherals fully stabilize before release - avoids race conditions on power-up |
| Internal 5 kΩ pull-up resistor | Reduces BOM count by one component and eliminates layout risk of missing or incorrect external pull-up value |
| Temperature-compensated reference | Maintains trip point accuracy across -40°C to +85°C - no calibration or trimming required in field deployment |
| Fast VCC detect response (100 ns) | Enables reliable reset generation even during rapid supply collapse - prevents processor lockup during brown-outs |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Power interruption during firmware update or sensor data acquisition. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low RESET for ARM Cortex-M4 MCU during VCC sag. Use Value: 350 ms guaranteed hold time prevents partial register writes and ensures deterministic recovery after brown-out. | Use Scenario: Battery-backed ECG module operating from switched 5V rail with variable load transients. IC Role / Device Role / Timing Role: Voltage monitor and reset source for MSP430F5xx microcontroller with internal LDO. Use Value: ±5% trip accuracy (4.5–4.75 V) aligns precisely with MCU's minimum operating voltage, avoiding premature resets. |
| Automotive Body Control Module | Point-of-Sale Terminal |
Use Scenario: Ignition cycling causing repeated 5V rail dips below 4.75 V during engine cranking. IC Role / Device Role / Timing Role: Reset supervisor for Infineon XC22xx 16-bit microcontroller in CAN-connected BCM. Use Value: Immunity to 300 µs VCC slew rates prevents spurious resets during cranking-induced transients. | Use Scenario: Uninterruptible 5V supply powering dual-core ARM-based payment processor with EEPROM logging. IC Role / Device Role / Timing Role: Power-fail detector triggering controlled shutdown sequence via GPIO-interruptable RESET line. Use Value: Internal 5 kΩ pull-up enables direct connection to processor's reset input - no additional passive components needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691CPA+ | Includes watchdog timer and manual reset input; higher quiescent current (120 µA vs. 50 µA); SO-8 package | Required where system-level fault recovery beyond power monitoring is needed (e.g., software hang detection) | Select when watchdog functionality is mandatory; not drop-in due to pin count, package, and feature set mismatch |
| TPS3808G33DBVR | Adjustable threshold (via external resistor); 200 ms min reset timeout; 1.5 µA quiescent current; SOT-23-5 package | Better suited for ultra-low-power battery applications; lacks internal pull-up and fixed 5% trip point | Choose for energy-constrained designs needing programmable trip points; requires external resistor network and pull-up |
Compared with MAX691CPA+ and TPS3808G33DBVR, the DS1233D-5/T&R delivers fixed-accuracy 5% monitoring with minimal external components and guaranteed 350 ms reset hold - ideal for cost-sensitive, high-volume industrial controllers where simplicity and deterministic timing outweigh programmability or ultra-low IQ.
Availability
DS1233D-5/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, automotive body control modules, and point-of-sale terminals requiring stable component supply and long-term production continuity.
Supply support for DS1233D-5/T&R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications infrastructure.
The DS1233D-5/T&R belongs to the EconoReset™ family of supervisory circuits engineered for cost-effective, single-function power monitoring in resource-constrained embedded systems - prioritizing accuracy, reliability, and minimal external component count over programmability.
FAQ
What is the exact VCC trip point range for DS1233D-5/T&R?
The DS1233D-5/T&R has a guaranteed VCC trip point range of 4.5 V (minimum) to 4.75 V (maximum), corresponding to ±5% tolerance around nominal 5 V supply. This is specified in the DC Electrical Characteristics table under VCCTP1 parameter and confirmed in the EconoReset Selection Guide. The trip point remains stable across -40°C to +85°C due to internal temperature compensation.
Does DS1233D-5/T&R require an external pull-up resistor on the RESET pin?
No, DS1233D-5/T&R includes an internal pull-up resistor of 3.75–6.25 kΩ, eliminating the need for an external component on the active-low RESET output. This simplifies PCB layout and reduces BOM count. However, if interfacing with logic families requiring stronger pull-up (e.g., certain 3.3 V I/O), an external resistor may still be added in parallel.
What is the reset pulse width specification for DS1233D-5/T&R?
The DS1233D-5/T&R guarantees a reset active time (tRST) of 250–450 ms, with a typical value of 350 ms after VCC returns to within tolerance. This specification is measured from the moment VCC crosses the trip threshold until RESET deasserts, ensuring adequate stabilization time for microprocessors and associated peripherals during power-up or recovery.
Is DS1233D-5/T&R compatible with 3.3 V microcontrollers?
Yes, DS1233D-5/T&R is compatible with 3.3 V microcontrollers because its RESET output is open-drain and operates at logic-low ≤0.4 V (at 8 mA sink), which meets standard 3.3 V CMOS/TTL input thresholds. Its VCC pin accepts 1.2–5.5 V, but the trip point remains fixed at ~4.5–4.75 V - so it monitors a 5 V rail, not the 3.3 V domain directly.
What package type is used for DS1233D-5/T&R?
DS1233D-5/T&R is supplied in the SOT-223 surface-mount package, featuring four terminals (including dedicated thermal ground pad on pin 4). This differs from the 3-pin TO-92 version (DS1233D-5) and is optimized for automated assembly and improved thermal performance in high-density PCB layouts.
DS1233D-5/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.625V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 250ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
DS1233D-5/T&R FAQ
1.How can I place an order for DS1233D-5/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233D-5/T&R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS1233D-5/T&R reliable?
The price and inventory of DS1233D-5/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233D-5/T&R is usually 5 days.
3.What payment methods are accepted for DS1233D-5/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233D-5/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233D-5/T&R?
DS1233D-5/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233D-5/T&R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS1233D-5/T&R?
For technical support, including DS1233D-5/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233D-5/T&R requirements.
6.How does Aetrix verify that DS1233D-5/T&R is sourced from the original manufacturer or authorized distributors?
All DS1233D-5/T&R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1233D-5/T&R meets industry standards.
7.What is the process for return or replacement of DS1233D-5/T&R?
All DS1233D-5/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1233D-5/T&R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS1233D-5/T&R part is unused and in its original packaging.
Return procedure for DS1233D-5/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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