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Analog Devices Inc./Maxim Integrated MAX903ESA-T
- Part No.:
- MAX903ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX903ESA-T.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,788
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Product details
Overview
MAX903ESA-T from Maxim Integrated is a high-speed, low-power, single-channel voltage comparator with differential analog inputs and TTL-logic output featuring active internal pull-up, 8ns typical propagation delay at 5mV overdrive, ±5V or +5V single-supply operation, and independent TTL-compatible latch input - used in high-speed A/D converters, line receivers, and PWM circuits.
For engineers reviewing the MAX903ESA-T datasheet, MAX903ESA-T pinout, MAX903ESA-T application, or MAX903ESA-T equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply-chain support for legacy industrial and test-equipment designs.
Technical Context
The MAX903ESA-T implements a high-gain, wide-bandwidth comparator core optimized for sub-10ns response to small-signal overdrive (5mV), with separate analog (VCC/VEE) and digital (VDD) supplies enabling noise isolation in mixed-signal systems. Its input common-mode range extends to the negative rail (VEE), supporting ground-referenced sensing under single-supply conditions (+5V VCC, VEE = GND).
It integrates a dedicated TTL-compatible latch input (Pin 5) that freezes the output state on low assertion, eliminating metastability during asynchronous sampling - a feature absent in MAX901 but shared with MAX900/MAX902. Propagation delay matching between rising/falling edges (∆tpd ≤ 2ns) ensures precise timing in dual-edge-triggered applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 8ns typ (5mV overdrive, CL = 15pF) - enables sampling at >100MHz effective rates in flash ADC front-ends. |
| Input Offset Voltage | 1–3mV (full temp range) - supports accurate threshold detection down to ~10mV resolution in precision trigger circuits. |
| Supply Configuration | Separate VCC/VEE (±5V or +5V/GND) + VDD (+5V) - allows analog/digital domain isolation to suppress digital switching noise coupling. |
| Output Type | TTL-compatible with active pull-up - directly drives LS-TTL loads (fan-out of 4) without external resistors. |
| Latch Input Threshold | VLH = 1.4–2.0V, VLL = 0.8–1.4V - compatible with standard 5V TTL logic families for synchronous capture control. |
| Power Dissipation | 18mW typ at +5V - enables dense placement in multi-comparator signal-conditioning modules without thermal derating. |
| Input Common-Mode Range | VEE − 0.1V to VCC − 2.25V - permits ground-sensing operation when VEE = GND and VCC = +5V. |
Pinout & Package
MAX903ESA-T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with 1.27mm pitch and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive analog supply (±5V or +5V to +10V); must be decoupled locally to maintain high-speed stability. |
| 2 | IN+ | Non-inverting input; accepts signals within VEE − 0.1V to VCC − 2.25V common-mode range. |
| 3 | IN− | Inverting input; differential pair with IN+ defines comparison threshold and hysteresis margin. |
| 4 | VEE | Negative analog supply and substrate connection; tied to GND for single-supply operation. |
| 5 | LATCH | TTL-compatible enable input; driven low to hold current output state; high to resume transparent operation. |
| 6 | GND | Digital/analog reference ground; requires low-inductance PCB plane connection per layout guidelines. |
| 7 | OUT | TTL-output stage with active pull-up; sinks up to 8mA, sources ≥1mA at VOH ≥2.4V. |
| 8 | VDD | +5V digital supply for latch logic and output driver; separate from analog supplies to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| 8ns propagation delay | Enables reliable discrimination of <12ns pulse widths in high-speed data sampling and clock recovery paths. |
| Independent latch input | Allows precise, externally controlled snapshot capture of transient analog events without CPU intervention. |
| Input range includes negative rail | Permits direct interface to bipolar sensors or AC-coupled signals without level-shifting circuitry. |
| Separate analog/digital supplies | Reduces digital supply noise injection into analog comparators - critical in mixed-signal instrumentation. |
| TTL-compatible outputs | Eliminates need for external pull-up resistors or logic-level translators when interfacing to 5V microcontrollers. |
Applications
| High-Speed A/D Converters | Line Receivers |
|---|---|
|
Use Scenario: Front-end comparator array in flash or folding ADC architectures requiring sub-10ns decision latency. IC Role / Device Role / Timing Role: Voltage discriminator converting analog input slices into parallel digital bits with deterministic timing alignment. Use Value: 8ns tpd and matched rising/falling delays (∆tpd ≤ 2ns) minimize aperture uncertainty and improve ENOB in >20MSPS converters. |
Use Scenario: RS-422/RS-485 receiver stage converting differential bus signals into clean TTL logic levels. IC Role / Device Role / Timing Role: High-speed differential receiver with rail-to-rail input capability and latch-controlled data capture. Use Value: VEE-to-VCC input range and fast response allow direct termination at receiver end without bias networks, reducing component count. |
| PWM Signal Conditioning | Threshold Detectors |
|
Use Scenario: Edge-detection and dead-time insertion in motor-control gate-driver feedback loops. IC Role / Device Role / Timing Role: Comparator with latch synchronizing PWM edge transitions to system clock domain. Use Value: Latch input enables glitch-free sampling of noisy PWM edges; 18mW power supports thermally constrained IGBT drivers. |
Use Scenario: Overvoltage/undervoltage monitoring in DC power supplies and battery management systems. IC Role / Device Role / Timing Role: Precision threshold detector with latch-hold for alarm flag persistence across microcontroller sleep cycles. Use Value: 1–3mV VOS and rail-sensing capability ensure accurate trip points at ±1% tolerance without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9203ESA+ | Pin-for-pin compatible, same 8ns tpd, but 9mW/comparator (half power), improved PSRR (150µV/V min), no latch input. | Not suitable where synchronous latching is required; preferred for new designs needing lower thermal load and higher noise immunity. | Select MAX9203ESA+ only if latch functionality is unnecessary and power reduction is prioritized. |
| LM360N | 8-pin DIP, 4.5ns tpd, ±15V supplies, no latch, higher input bias (250nA), no separate VDD. | Better suited for high-voltage industrial sensing; incompatible pinout and supply architecture prevents drop-in replacement. | Choose LM360N for ultra-fast (<5ns), high-voltage (>±10V) applications where latch control and low power are secondary. |
Compared with MAX903ESA-T, MAX9203ESA+ offers identical speed and footprint with halved power and no latch - ideal for new designs avoiding legacy constraints; LM360N provides faster response and wider supply range but lacks latch support and requires board redesign due to different pinout and supply scheme.
Availability
MAX903ESA-T is available at Aetrix Electronics and suitable for high-speed data acquisition, industrial line-receiver modules, and legacy test-equipment repair requiring stable component supply despite Not Recommended for New Designs status.
Supply support for MAX903ESA-T 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-speed interface ICs for industrial, communications, and computing markets.
The MAX900–MAX903 family was designed for high-speed data discrimination in time-critical systems such as A/D converters, V/F converters, and digital sampling circuits - emphasizing speed, low power, and flexible supply architecture.
FAQ
What is the operating temperature range for MAX903ESA-T?
The MAX903ESA-T is specified for operation from -40°C to +85°C (industrial grade), as confirmed by its ordering code suffix "E" and datasheet Section "Ordering Information". This range applies to all electrical characteristics unless otherwise noted, and the SO package (ESA) is rated for full thermal performance across this span without derating.
Does MAX903ESA-T support single-supply operation?
Yes, MAX903ESA-T supports true single-supply operation: tie VEE to GND and apply +5V to VCC (analog) and VDD (digital). Its input common-mode range extends to the negative rail (VEE − 0.1V), enabling ground-referenced input signals - a key capability confirmed in the "Electrical Characteristics" table and "Applications Information" section.
Is the latch function on MAX903ESA-T TTL-compatible?
Yes, the latch input (Pin 5) of MAX903ESA-T is fully TTL-compatible: VLH = 1.4–2.0V and VLL = 0.8–1.4V, matching standard TTL logic thresholds. The latch holds the output state when driven low and resumes transparency when high - a behavior explicitly documented in the "Pin Descriptions", "Timing Diagram", and "Features" sections of the datasheet.
What is the maximum load capacitance MAX903ESA-T can drive while maintaining 8ns propagation delay?
MAX903ESA-T maintains its 8ns typical propagation delay with CL = 15pF, as tested per the "Timing Characteristics" table. Response time degrades linearly with increasing load capacitance - e.g., tpd increases to ~12ns at 50pF (per Figure MAX900-03 toc08). For designs requiring consistent sub-10ns timing, keep total node capacitance ≤15pF using short traces and minimal stubs.
Why is MAX903ESA-T marked "Not Recommended for New Designs"?
MAX903ESA-T is marked "Not Recommended for New Designs" because its fabrication process at an external wafer foundry has been discontinued, as stated in the datasheet's opening notice. While fully functional and supported for existing designs, Maxim recommends MAX9203ESA+ as a pin-compatible, lower-power successor - though MAX903ESA-T remains available through authorized distributors for legacy repair and continuity programs.
MAX903ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Latch
- Number of Elements:
- 1
- Output Type:
- TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 10V, ±2.5V ~ 5V
- :
- 4mV @ ±5V
- Voltage - Input Offset (Max):
- 10µA @ ±5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 4mA, 3mA, 1.5mA
- Current - Quiescent (Max):
- 82.5dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX903ESA-T FAQ
1.How can I place an order for MAX903ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX903ESA-T 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 MAX903ESA-T reliable?
The price and inventory of MAX903ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX903ESA-T is usually 5 days.
3.What payment methods are accepted for MAX903ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX903ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX903ESA-T?
MAX903ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX903ESA-T 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 MAX903ESA-T?
For technical support, including MAX903ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX903ESA-T requirements.
6.How does Aetrix verify that MAX903ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX903ESA-T 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 MAX903ESA-T meets industry standards.
7.What is the process for return or replacement of MAX903ESA-T?
All MAX903ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX903ESA-T, 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 MAX903ESA-T part is unused and in its original packaging.
Return procedure for MAX903ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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