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Analog Devices Inc./Maxim Integrated MAX903CSA-T
- Part No.:
- MAX903CSA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX903CSA-T.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,982
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Product details
Overview
MAX903CSA-T from Maxim Integrated is a high-speed, low-power quad voltage comparator IC with differential analog inputs and TTL-compatible outputs featuring active internal pull-ups. It delivers 8ns typical propagation delay at 5mV overdrive, consumes 18mW per comparator at +5V, supports ±5V or single +5V analog supply, and includes independent TTL latch inputs for output state retention. It is used in high-speed A/D converters, line receivers, and PWM circuits.
For engineers reviewing the MAX903CSA-T datasheet, MAX903CSA-T pinout, MAX903CSA-T application, or MAX903CSA-T equivalent, key selection considerations include its 8ns propagation delay, latch-enabled output hold capability, dual-supply flexibility (±5V or +5V analog with +5V digital), ground-sensing input range, and SO-8 package compatibility with industrial temperature operation.
Technical Context
The MAX903CSA-T implements four independent high-gain comparators with fully differential analog inputs referenced to VEE (analog negative rail) and VCC (analog positive rail), plus separate VDD (+5V digital supply) and GND. Each channel features TTL-compatible latch control enabling synchronous sampling and output freezing without external logic.
Its analog input common-mode range extends to the negative rail (VEE), supporting ground-referenced sensing in single-supply configurations. Propagation delay is guaranteed ≤15ns over full temperature range (-40°C to +85°C), with matched tpd+ and tpd− response times and <3ns inter-channel skew (∆tpd).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 8ns typ (5mV overdrive, CL = 15pF); enables sampling of >100MHz signals in A/D front-ends. |
| Power Dissipation | 18mW per comparator at +5V; allows thermal management in dense quad-comparator layouts. |
| Analog Supply Range | +5V to +10V or ±5V; supports both single-rail ground-sensing and split-rail precision applications. |
| Input Common-Mode Range | Includes VEE (negative rail); permits direct interface to 0V-referenced sensors or DAC outputs. |
| Latch Input Compatibility | TTL-level (VLH = 1.4–2.0V, VLL = 0.8–1.4V); interfaces directly with standard logic without level-shifting. |
| Output Drive | VOH ≥ 2.4V @ 1mA, VOL ≤ 0.4V @ 8mA; drives four LS-TTL loads with margin. |
| Operating Temperature | -40°C to +85°C; qualified for industrial embedded and instrumentation environments. |
Pinout & Package
MAX903CSA-T is housed in an 8-pin SO (Small Outline) package with gull-wing leads, JEDEC MS-012AC compliant, 150 mil body width, and RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive analog supply input; must be decoupled locally to support fast transient current demands. |
| 2 | IN+ | Non-inverting input of Channel A; accepts signals up to VCC + 0.2V without damage. |
| 3 | IN− | Inverting input of Channel A; common-mode range includes VEE − 0.1V for ground-sensing. |
| 4 | VEE | Analog negative supply and substrate connection; tied to system analog ground in single-supply mode. |
| 5 | LATCH | TTL-compatible latch enable for Channel A; low → latches current output state, high → transparent mode. |
| 6 | GND | Digital/substrate ground reference; requires low-inductance connection to minimize noise coupling. |
| 7 | OUT | TTL-compatible open-collector output with internal pull-up; sinks up to 8mA, sources ~1mA. |
| 8 | VDD | +5V digital supply; powers latch circuitry and output stage; must be decoupled separately from VCC. |
Key Features
| Feature | Design Value |
|---|---|
| 8ns typical propagation delay | Enables real-time threshold detection in >100MHz sampling systems without added timing uncertainty. |
| Independent TTL latch per channel | Allows synchronized capture of analog events across multiple channels using shared clock/latch signals. |
| Input range includes negative rail | Eliminates need for level-shifting when interfacing with bipolar or ground-referenced signal sources. |
| Separate analog/digital supplies | Reduces digital switching noise coupling into analog comparators via dedicated VCC/VEE and VDD/GND paths. |
| 18mW/comparator power consumption | Supports integration of four comparators on space-constrained PCBs without excessive thermal load. |
Applications
| High-Speed A/D Converters | Line Receivers |
|---|---|
|
Use Scenario: Front-end threshold comparison in flash or pipeline ADC architectures requiring sub-10ns decision latency. IC Role / Device Role / Timing Role: Quad comparator providing parallel analog-to-digital decision points with simultaneous latching for pipeline stage synchronization. Use Value: 8ns propagation delay and matched tpd+/tpd− ensure consistent sampling window alignment across all four channels. |
Use Scenario: Differential signal recovery in RS-422/RS-485 receiver stages with noise immunity and fast edge detection. IC Role / Device Role / Timing Role: High-speed comparator converting differential line voltages to clean TTL logic levels with latch capability for metastability suppression. Use Value: Input common-mode range including VEE allows direct interface to terminated transmission lines referenced to local ground. |
| PWM Circuits | Threshold Detectors |
|
Use Scenario: Real-time duty-cycle monitoring and fault detection in motor control or SMPS feedback loops. IC Role / Device Role / Timing Role: Comparator comparing sensed current/voltage against programmable thresholds with latch for pulse-width capture. Use Value: Independent latch inputs allow precise edge-triggered capture of PWM rising/falling edges without CPU intervention. |
Use Scenario: Multi-level alarm generation in sensor monitoring systems (e.g., temperature, pressure, voltage rails). IC Role / Device Role / Timing Role: Quad comparator implementing four independent over/under-voltage thresholds with simultaneous status latching. Use Value: Four integrated channels reduce component count versus discrete solutions while maintaining channel-to-channel timing coherence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9203ESA+ | Pin-for-pin compatible, same 8ns propagation delay, but 9mW/comparator (50% lower power) and improved PSRR (150–500 µV/V vs. 100–250 µV/V). | Preferred for new designs requiring extended battery life or tighter supply-noise rejection in mixed-signal systems. | Select MAX9203ESA+ when upgrading legacy MAX903CSA-T designs to reduce power and improve noise immunity without layout changes. |
| LM319M/NOPB | Higher propagation delay (80ns typ), no latch inputs, single +5V only, wider supply range (±15V), higher power (40mW). | Suitable for non-critical timing applications where latch functionality is unnecessary and higher supply tolerance is required. | Choose LM319M/NOPB only if latch-free operation, wider voltage range, or cost sensitivity outweighs speed and power requirements. |
Compared with MAX903CSA-T, MAX9203ESA+ offers identical timing and pinout with halved power and better PSRR-ideal for drop-in upgrades-while LM319M/NOPB trades speed and latch capability for broader supply flexibility and legacy availability, requiring redesign for latch-dependent functions.
Availability
MAX903CSA-T is available at Aetrix Electronics and suitable for high-speed data acquisition, industrial sensor interface, and precision PWM monitoring requiring stable component supply across extended temperature ranges.
Supply support for MAX903CSA-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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX900–MAX903 family was designed specifically for high-speed, low-power threshold discrimination in data conversion, communication, and real-time control systems-prioritizing propagation delay, latch synchronization, and supply flexibility over general-purpose comparator features.
FAQ
What is the operating temperature range for MAX903CSA-T?
The MAX903CSA-T is specified for industrial operation from -40°C to +85°C. This range is confirmed in the Ordering Information table for part number MAX903CSA (without -T suffix) and applies identically to the tape-and-reel variant MAX903CSA-T. Electrical characteristics-including propagation delay, input offset voltage, and latch timing-are guaranteed across this full range.
Does MAX903CSA-T support single-supply operation?
Yes, MAX903CSA-T supports true single-supply operation with VEE grounded and VCC supplied at +5V to +10V. Its input common-mode range extends to the negative rail (VEE), enabling ground-referenced input signals. The digital supply VDD remains fixed at +5V regardless of analog supply configuration.
Is MAX903CSA-T pin-compatible with other devices in the MAX900 family?
No-MAX903CSA-T is a single-channel comparator in 8-pin SO package, whereas MAX900 (quad) uses 20-pin DIP/SO, MAX901 (dual) uses 16-pin DIP/SO, and MAX902 (dual) uses 14-pin DIP/SO. Pin count, function mapping, and channel count differ fundamentally; only MAX9203ESA+ is documented as pin-for-pin compatible with MAX903CSA-T.
What is the purpose of the LATCH pin on MAX903CSA-T?
The LATCH pin on MAX903CSA-T controls output transparency: when driven low (≤0.8V), it freezes the current output state; when high (≥1.4V), the comparator responds immediately to input changes. This enables synchronous sampling of analog events without external flip-flops, critical for time-aligned multi-channel systems.
Why is MAX903CSA-T marked "Not Recommended for New Designs"?
MAX903CSA-T is marked "Not Recommended for New Designs" because its wafer process was discontinued by Maxim's foundry partner. While functional units remain available, Maxim recommends MAX9203ESA+ as a direct replacement offering identical speed, pinout, and enhanced specs (lower power, better PSRR). Legacy support continues for existing designs via datasheet and technical assistance.
MAX903CSA-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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX903CSA-T FAQ
1.How can I place an order for MAX903CSA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX903CSA-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 MAX903CSA-T reliable?
The price and inventory of MAX903CSA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX903CSA-T is usually 5 days.
3.What payment methods are accepted for MAX903CSA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX903CSA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX903CSA-T?
MAX903CSA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX903CSA-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 MAX903CSA-T?
For technical support, including MAX903CSA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX903CSA-T requirements.
6.How does Aetrix verify that MAX903CSA-T is sourced from the original manufacturer or authorized distributors?
All MAX903CSA-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 MAX903CSA-T meets industry standards.
7.What is the process for return or replacement of MAX903CSA-T?
All MAX903CSA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX903CSA-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 MAX903CSA-T part is unused and in its original packaging.
Return procedure for MAX903CSA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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