My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1233M-55
- Part No.:
- DS1233M-55
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1233M-55.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,485
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1233M-55 from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring microprocessor supervisory circuit in TO-92 or 8-pin SOIC package, featuring a 4.5 V to 4.75 V VCC trip point, 350 ms reset pulse width, and active-low RST output. It monitors power supply integrity for Motorola 68XXX/HC16 microprocessors and replaces MC33064/MC34064 series in embedded control systems.
For engineers reviewing the DS1233M-55 datasheet, DS1233M-55 pinout, DS1233M-55 application, or DS1233M-55 equivalent, key selection criteria include its guaranteed 4.625 V typical trip threshold, -40°C to +85°C operating range, internal 5 kΩ pullup resistor, compatibility with legacy 68XXX reset timing, and dual-package availability for through-hole or surface-mount design flexibility.
Technical Context
The DS1233M-55 uses a temperature-compensated bandgap reference and comparator to detect VCC deviations beyond ±2.5% of its nominal 4.625 V trip point. Its internal power-fail detection logic asserts RST low on out-of-tolerance conditions and holds it active for 200–500 ms after VCC recovery, ensuring stable microprocessor boot.
It operates across 1.2 V to 5.5 V supply range with only 50 µA quiescent current, supports 8 mA sink capability at 0.4 V, and integrates a 3.75–6.5 kΩ internal pullup - eliminating external components required by discrete reset solutions like the MC34064.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.5 V (min), 4.625 V (typ), 4.75 V (max) - defines precise power-fail detection threshold for 5 V systems |
| Reset Pulse Width | 200–500 ms - ensures sufficient stabilization time for microprocessor and power supply post-recovery |
| Operating Temperature | -40°C to +85°C - validated for industrial-grade embedded control environments |
| Supply Voltage Range | 1.2 V to 5.5 V - supports wide-input operation including brownout tolerance below nominal VCC |
| Output Sink Current | 8 mA @ 0.4 V - drives standard TTL/CMOS reset inputs without external buffer |
| Quiescent Current | 50 µA - enables low-power system monitoring in battery-backed or energy-constrained designs |
| Internal Pullup Resistor | 3.75–6.5 kΩ - eliminates need for external pullup on RST line in most 5 V microprocessor interfaces |
Pinout & Package
DS1233M-55 is available in TO-92 (3-pin) and 8-pin SOIC packages. Pin functions are identical across both variants except for NC pins in SOIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low reset output | Drives microprocessor RESET# input; asserted low during power failure or startup |
| VCC | Power supply input | Monitored supply rail; powers internal reference and comparator circuitry |
| GND | Ground reference | Common return path for VCC and RST; must be low-impedance for accurate trip-point stability |
| NC (SOIC only) | No-connect terminal | Unbonded die pad; must remain unconnected to avoid parasitic coupling or latch-up risk |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage trip point | Guaranteed 4.5–4.75 V window with ±2.5% tolerance - enables reliable 5 V system power fail detection without calibration |
| Fixed 350 ms reset timeout | Internally timed assertion period - eliminates external RC timing components and associated drift or temperature sensitivity |
| Temperature-compensated reference | Built-in bandgap reference stable over -40°C to +85°C - maintains trip accuracy across full industrial temperature range |
| Integrated 5 kΩ pullup resistor | Reduces BOM count by one passive component - simplifies layout and improves reliability vs. discrete pullup solutions |
| Motorola 68XXX/HC16 compatibility | Pin- and timing-compatible with legacy reset controllers - enables drop-in replacement in existing 68000-based designs |
Applications
| Industrial PLC Control | Legacy Automotive ECU |
|---|---|
Use Scenario: Power monitoring in programmable logic controller mainboards where brownout resilience prevents spurious relay actuation. IC Role / Device Role / Timing Role: Supervisory IC generating controlled reset pulse upon VCC dip below 4.625 V, holding RST low for ≥350 ms during recovery. Use Value: Prevents firmware corruption during unstable 5 V rail transitions, meeting IEC 61000-4-11 immunity requirements for voltage dips. | Use Scenario: Reset management in pre-OBD-II engine control units using Motorola 68HC11 microcontrollers. IC Role / Device Role / Timing Role: Direct replacement for MC34064 in 5 V automotive subsystems, asserting active-low reset compatible with HC11 RESET# pin. Use Value: Eliminates need for external pullup and RC timing network, reducing board space and improving long-term thermal stability. |
| Point-of-Sale Terminal | Medical Infusion Pump Controller |
Use Scenario: Ensuring clean boot sequence in retail terminals powered from shared AC-DC adapters prone to transient sags. IC Role / Device Role / Timing Role: Voltage supervisor detecting VCC excursions below 4.5 V and enforcing 350 ms reset hold time before releasing processor. Use Value: Guarantees deterministic restart after adapter overload events, preventing transaction data loss or UI lockup. | Use Scenario: Critical power monitoring in battery-operated infusion pumps where undervoltage could compromise dose accuracy. IC Role / Device Role / Timing Role: Precision reset generator with 4.625 V trip point and 200–500 ms timeout, interfacing directly to ARM Cortex-M0 reset input. Use Value: Meets IEC 62304 Class C software safety requirements by ensuring processor reset occurs before supply drops below functional minimum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691ACSA+ | Higher 4.65 V trip (±1.5%), 1.6 µA quiescent current, integrated watchdog timer | Requires external capacitor for reset timeout; adds watchdog functionality not present in DS1233M-55 | Select when extended low-power operation or watchdog supervision is required alongside reset generation |
| TPS3808G33DBVR | 3.3 V fixed trip point, 200 ms min reset pulse, 1.6 µA IQ, SOT-23-5 package | Not pin-compatible; requires PCB redesign; optimized for modern 3.3 V microcontrollers | Choose for new 3.3 V designs needing ultra-low IQ and smaller footprint, not for 5 V legacy replacement |
Compared with MAX691ACSA+ and TPS3808G33DBVR, the DS1233M-55 delivers proven 5 V system compatibility, fixed 350 ms timeout without external components, and direct MC34064 pin mapping - making it optimal for cost-sensitive industrial upgrades and legacy 68XXX-based hardware maintenance.
Availability
DS1233M-55 is available at Aetrix Electronics and suitable for industrial PLC control, legacy automotive ECU refurbishment, and medical infusion pump controller designs requiring stable component supply and long-term obsolescence mitigation.
Supply support for DS1233M-55 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 computing applications.
The DS1233M-55 belongs to Maxim's EconoReset™ family of supervisory circuits, engineered specifically for cost-effective, high-reliability power monitoring in legacy microprocessor systems requiring minimal external components.
FAQ
What is the exact VCC trip point specification for DS1233M-55?
The DS1233M-55 has a guaranteed VCC trip point of 4.5 V (minimum), 4.625 V (typical), and 4.75 V (maximum) under operating conditions from -40°C to +85°C. This 4.625 V nominal threshold is factory-trimmed and temperature-compensated to ensure consistent detection of 5 V rail failures without external calibration. The DS1233M-55 datasheet specifies this range in the DC Electrical Characteristics table under VCCTP parameter.
Does DS1233M-55 require an external pullup resistor on the RST pin?
No, the DS1233M-55 integrates an internal pullup resistor ranging from 3.75 kΩ to 6.5 kΩ, eliminating the need for an external component in standard 5 V microprocessor reset interfaces. This feature reduces BOM count and improves reliability compared to discrete solutions like the MC34064. The DS1233M-55 datasheet confirms this in the DC Electrical Characteristics section under "Internal Pullup Resistor".
Is DS1233M-55 pin-compatible with MC34064?
Yes, the DS1233M-55 is pin-function compatible with the MC34064 in both TO-92 and SOIC packages, supporting direct replacement in existing designs. Its RST, VCC, and GND pin assignments match exactly, and the NC pins in SOIC do not affect interoperability. The DS1233M-55 datasheet explicitly states this compatibility in the Features section and Pin Descriptions table.
What is the reset pulse duration of DS1233M-55 after VCC recovery?
The DS1233M-55 holds the RST output active low for 200 ms (minimum), 350 ms (typical), and 500 ms (maximum) after VCC returns to within tolerance. This internally timed delay ensures microprocessor and power supply stabilization before release. The DS1233M-55 datasheet lists this as "Reset Active Time (tRST)" in the AC Electrical Characteristics table.
Can DS1233M-55 operate with supply voltages below 5 V?
Yes, the DS1233M-55 operates across a 1.2 V to 5.5 V supply range, enabling use in brownout-detection scenarios where VCC sags below nominal 5 V but remains above 1.2 V. Its 4.5–4.75 V trip window remains valid across this full range, and quiescent current stays at 50 µA. The DS1233M-55 datasheet confirms this in the Recommended DC Operating Conditions table.
DS1233M-55 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- 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:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
DS1233M-55 FAQ
1.How can I place an order for DS1233M-55 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233M-55 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 DS1233M-55 reliable?
The price and inventory of DS1233M-55 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233M-55 is usually 5 days.
3.What payment methods are accepted for DS1233M-55?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233M-55 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233M-55?
DS1233M-55 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233M-55 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 DS1233M-55?
For technical support, including DS1233M-55 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233M-55 requirements.
6.How does Aetrix verify that DS1233M-55 is sourced from the original manufacturer or authorized distributors?
All DS1233M-55 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 DS1233M-55 meets industry standards.
7.What is the process for return or replacement of DS1233M-55?
All DS1233M-55 units undergo pre-shipment inspection (PSI). If there is an issue with DS1233M-55, 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 DS1233M-55 part is unused and in its original packaging.
Return procedure for DS1233M-55:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1233M-55 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
