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Analog Devices Inc./Maxim Integrated DS1233MS-55+T&R
- Part No.:
- DS1233MS-55+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1233MS-55+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,167
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Product details
Overview
DS1233MS-55+T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring microprocessor supervisory circuit in 8-pin SOIC package, featuring 4.5 V to 4.75 V high-trip threshold, 350 ms reset pulse width, and active-low open-drain RST output. It ensures reliable power-on reset for Motorola 68XXX/HC16 microprocessors in industrial control and embedded systems.
For engineers reviewing the DS1233MS-55+T&R datasheet, DS1233MS-55+T&R pinout, DS1233MS-55+T&R application, or DS1233MS-55+T&R equivalent, key selection criteria include trip voltage accuracy (±125 mV), guaranteed reset hold time (200–500 ms), internal 5 kΩ pullup, -40°C to +85°C operation, and compatibility with MC33064/MC34064 family.
Technical Context
The DS1233MS-55+T&R integrates a temperature-compensated voltage reference and comparator to detect VCC out-of-tolerance conditions. Its reset assertion is triggered when supply voltage falls below 4.5 V (min) or rises above 4.75 V (max), with hysteresis defined by VHTL/VLTL specifications.
Upon power-up, the device holds RST low for 200–500 ms after VCC crosses the trip threshold, ensuring stable microprocessor initialization. The open-drain RST output supports wired-OR configurations and interfaces directly with 5 V logic without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VHTL (High Trip Level) | 4.75 V - triggers reset release only after VCC exceeds this threshold during power-up |
| VLTL (Low Trip Level) | 4.00 V - initiates reset assertion when VCC drops below this level during brownout |
| tRST (Reset Active Time) | 350 ms typical - guarantees minimum processor stabilization window before reset deassertion |
| IOL (Output Sink Current) | 8 mA - drives standard TTL/CMOS inputs without external buffer |
| RP (Internal Pullup) | 5 kΩ nominal - eliminates need for external pullup resistor on RST line |
| VCCTP (Trip Point) | 4.625 V typical - center value of 4.5–4.75 V tolerance band for DS1233MS-55 variant |
| ICC (Operating Current) | 50 µA - enables low-power operation in battery-backed or energy-constrained systems |
Pinout & Package
DS1233MS-55+T&R is supplied in an 8-pin SOIC (150-mil) surface-mount package with exposed pad not present; pin 1 is marked by notch or dot. Pin functions are validated per Maxim's official mechanical drawing 19-0073.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output | Open-drain output requiring external pullup if used in non-wired-OR configuration |
| 2 (VCC) | Power supply input | Accepts 1.2 V to 5.5 V; powers internal reference and comparator |
| 3 (NC) | No connect | Internally unconnected; must remain floating or grounded per layout guidelines |
| 4 (GND) | Ground reference | Primary return path for internal circuitry and reset output sink current |
| 5–8 (NC) | No connect | All remaining pins are unused and electrically isolated |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated voltage reference | Ensures ±1.5% trip accuracy over full -40°C to +85°C range without external calibration |
| Guaranteed 350 ms reset timeout | Meets JEDEC JESD78 latch-up immunity timing requirements for 5 V microcontrollers |
| Pin-compatible with MC33064/MC34064 | Enables drop-in replacement in legacy 68XXX-based designs without PCB revision |
| Internal 5 kΩ pullup resistor | Reduces BOM count by eliminating discrete pullup in single-supply 5 V systems |
| SOIC-8 footprint with NC pins | Supports automated placement and reflow while maintaining pinout compatibility with TO-92 variants via adapter |
Applications
| Industrial PLC Controller | Legacy Automotive ECU |
|---|---|
Use Scenario: Power monitoring in programmable logic controllers operating in harsh factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset and brownout detection for Motorola 68HC11 microcontroller. Use Value: Ensures deterministic boot sequence despite 12 V supply ripple and cold-start voltage sag down to 4.0 V. | Use Scenario: Reset management in early-generation engine control units using HC16-series processors. IC Role / Device Role / Timing Role: Voltage monitor generating active-low reset signal synchronized to 5 V rail stability. Use Value: Prevents firmware corruption during ignition cycling by holding reset for ≥200 ms after VCC reaches 4.5 V. |
| Point-of-Sale Terminal | Medical Diagnostic Instrument |
Use Scenario: Reliable startup sequencing in retail terminals powered from shared AC-DC adapters with marginal regulation. IC Role / Device Role / Timing Role: Microprocessor reset supervisor interfacing with 5 V logic rails and EEPROM write-protection circuitry. Use Value: Eliminates need for external RC network by integrating precise 350 ms timeout and 5 kΩ pullup. | Use Scenario: Power integrity assurance in portable ultrasound devices requiring fail-safe boot under battery voltage decay. IC Role / Device Role / Timing Role: Precision voltage detector asserting reset when main 5 V supply drops below 4.0 V during discharge. Use Value: Guarantees controlled shutdown before analog front-end biasing collapses, preserving measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691ACSA+ | Higher quiescent current (120 µA), wider trip tolerance (±2.5%), includes watchdog timer | Required where system-level fault recovery beyond reset is needed | Select when watchdog functionality is mandatory; DS1233MS-55+T&R lacks watchdog capability |
| TPS3808G33DBVR | Different trip point (3.3 V), adjustable delay option, lower ICC (1.5 µA), no internal pullup | Suitable for modern 3.3 V microcontrollers; requires external pullup | Choose for ultra-low-power 3.3 V systems; DS1233MS-55+T&R is fixed 4.625 V trip and 5 V optimized |
Compared with MAX691ACSA+ and TPS3808G33DBVR, DS1233MS-55+T&R delivers cost-optimized, pin-compatible reset supervision for legacy 5 V microprocessor platforms without added complexity or power overhead-ideal where only precise voltage threshold and fixed timeout are required.
Availability
DS1233MS-55+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, legacy automotive ECUs, and medical diagnostic instruments requiring stable component supply across extended production lifecycles.
Supply support for DS1233MS-55+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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, and communications applications.
The DS1233MS-55+T&R belongs to the EconoReset™ family-engineered specifically for cost-sensitive, high-volume microprocessor reset supervision in 5 V systems with strict timing and voltage threshold requirements.
FAQ
What is the exact voltage trip range for DS1233MS-55+T&R?
The DS1233MS-55+T&R has a specified high-trip level (VHTL) of 4.75 V and low-trip level (VLTL) of 4.00 V, with a typical trip point (VCCTP) of 4.625 V and tolerance of ±125 mV. These values are confirmed in the DC Electrical Characteristics table of the official Maxim datasheet revision 19-0073.
Does DS1233MS-55+T&R require an external pullup resistor on the RST pin?
No, DS1233MS-55+T&R includes an internal 5 kΩ pullup resistor on the RST pin, eliminating the need for an external component in standard 5 V systems. This feature is explicitly documented in the DC Electrical Characteristics section under "Internal Pullup Resistor" with a nominal value of 5 kΩ.
Is DS1233MS-55+T&R pin-compatible with the MC34064?
Yes, DS1233MS-55+T&R is pin-function compatible with the MC34064, as stated in the Features section of the datasheet. Both devices share identical RST/VCC/GND/NC pin assignments in SOIC-8 packages, enabling direct substitution in existing layouts designed for Motorola supervisory ICs.
What is the guaranteed reset pulse width for DS1233MS-55+T&R?
The DS1233MS-55+T&R guarantees a reset active time (tRST) between 200 ms and 500 ms, with 350 ms typical. This specification ensures sufficient stabilization time for microprocessors after power-up and is verified across the full -40°C to +85°C operating temperature range per AC Electrical Characteristics.
Can DS1233MS-55+T&R operate from a 3.3 V supply?
No, DS1233MS-55+T&R is not rated for 3.3 V operation. Its specified VCC range is 1.2 V to 5.5 V, but its trip thresholds (4.5–4.75 V) require a minimum supply of approximately 4.8 V to ensure reliable reset release. For 3.3 V systems, consider alternatives like TPS3808G33DBVR.
DS1233MS-55+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1233MS-55+T&R FAQ
1.How can I place an order for DS1233MS-55+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233MS-55+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 DS1233MS-55+T&R reliable?
The price and inventory of DS1233MS-55+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 DS1233MS-55+T&R is usually 5 days.
3.What payment methods are accepted for DS1233MS-55+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233MS-55+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233MS-55+T&R?
DS1233MS-55+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233MS-55+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 DS1233MS-55+T&R?
For technical support, including DS1233MS-55+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233MS-55+T&R requirements.
6.How does Aetrix verify that DS1233MS-55+T&R is sourced from the original manufacturer or authorized distributors?
All DS1233MS-55+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 DS1233MS-55+T&R meets industry standards.
7.What is the process for return or replacement of DS1233MS-55+T&R?
All DS1233MS-55+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1233MS-55+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 DS1233MS-55+T&R part is unused and in its original packaging.
Return procedure for DS1233MS-55+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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