My Inquiry
My Account
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:2,388
Please send an inquiry. Send us your inquiry, and we will respond immediately.
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 supplies with input common-mode range extending to the negative rail, and includes independent TTL latch inputs for output hold functionality - ideal for high-speed A/D converter front-ends and line receiver 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 retention, dual-supply flexibility (±5V analog / +5V digital), ground-sensing capability, and SO-8 package compatibility with legacy board layouts.
Technical Context
The MAX903CSA+T implements four independent high-gain comparators with fully differential analog inputs referenced to VEE (analog negative supply/substrate) and VCC (analog positive supply), plus separate digital supply VDD (+5V only). Each channel features TTL-compatible output stages with internal pull-ups and dedicated latch inputs that freeze output states on logic-low assertion.
Its analog input common-mode range spans VEE − 0.1V to VCC − 2.25V, enabling ground-referenced sensing in single-supply configurations (VEE = GND). Propagation delay is guaranteed ≤15ns over full temperature range (0°C to +70°C), with matched timing between channels (Δtpd ≤ 3ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 8ns typical (5mV overdrive, CL = 15pF); enables sampling of >100MHz signals in A/D interfaces. |
| Power Dissipation | 18mW per comparator at +5V; allows dense integration without thermal derating in compact systems. |
| Analog Supply Range | +5V to +10V (VEE = GND) or ±5V; supports both single-rail and split-rail analog signal conditioning. |
| Input Common-Mode Range | Includes VEE (negative rail); permits direct ground-referenced input detection without level-shifting. |
| Output Type | TTL-compatible with active internal pull-ups; drives standard LS-TTL loads without external resistors. |
| Latch Inputs | Four independent TTL-compatible latch inputs (pins 4, 5, 12, 13); enable synchronous output capture in multi-channel timing systems. |
| Input Offset Voltage | 1–3mV (max over temp); ensures accurate threshold detection in precision window-comparator applications. |
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, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive analog supply input (+5V to +10V); powers comparator core and input stage. |
| 2 | IN+ | Non-inverting input of Channel A; accepts differential or single-ended analog signals. |
| 3 | IN− | Inverting input of Channel A; paired with IN+ for differential comparison or used as reference. |
| 4 | VEE | Analog negative supply and substrate connection (−5V or GND); sets lower bound of input common-mode range. |
| 5 | LATCH | Latch enable input for Channel A; logic-low freezes current output state until next latch pulse. |
| 6 | GND | Digital ground reference; separates digital return path from analog ground (VEE) for noise isolation. |
| 7 | OUT | TTL-compatible output of Channel A; active-high when IN+ > IN− + VOS, with internal pull-up. |
| 8 | VDD | Positive digital supply (+5V only); powers output stage and latch circuitry independently of analog rails. |
Key Features
| Feature | Design Value |
|---|---|
| 8ns propagation delay | Enables real-time decision-making in high-speed data acquisition systems sampling at ≥100MSPS. |
| Independent TTL latch inputs | Allows synchronized capture of four comparator outputs using external timing control, critical for parallel threshold monitoring. |
| Separate analog/digital supplies | Reduces digital switching noise coupling into analog inputs-essential for mixed-signal integrity in PCB layouts. |
| Input range includes negative rail | Eliminates need for input biasing networks when interfacing with bipolar or ground-referenced sensors. |
| TTL-compatible outputs with internal pull-ups | Simplifies system-level interconnect by removing external pull-up resistors and reducing BOM count. |
Applications
| High-Speed A/D Converters | Line Receivers |
|---|---|
|
Use Scenario: Front-end signal conditioning for flash or pipeline ADCs requiring sub-10ns decision latency. IC Role / Device Role / Timing Role: Voltage comparator providing precise, low-jitter sampling trigger based on analog input crossing programmable thresholds. Use Value: 8ns propagation delay minimizes aperture uncertainty, directly improving effective resolution in high-speed digitization. |
Use Scenario: Differential signal recovery in RS-422/RS-485 receivers operating at >20Mbps. IC Role / Device Role / Timing Role: High-speed comparator converting differential bus voltages into clean TTL logic levels with minimal skew. Use Value: Matched channel delays (Δtpd ≤ 3ns) ensure consistent edge alignment across multi-bit data lanes. |
| Threshold Detectors | PWM Circuits |
|
Use Scenario: Real-time overvoltage/undervoltage monitoring in DC power supplies and battery management systems. IC Role / Device Role / Timing Role: Precision comparator detecting deviations from reference voltages with latch-hold for fault logging. Use Value: 1–3mV input offset voltage ensures accurate trip-point repeatability across temperature and supply variations. |
Use Scenario: Edge-aligned PWM generation in motor control and LED dimming where duty-cycle accuracy depends on comparator timing. IC Role / Device Role / Timing Role: Comparator comparing sawtooth carrier with control voltage to generate precise PWM edges. Use Value: Sub-10ns delay stability over temperature prevents duty-cycle drift in closed-loop feedback systems. |
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 delay, but 9mW/comparator (half power); requires identical SO-8 footprint. | Preferred for new designs requiring lower thermal load and extended battery life in portable instrumentation. | Select MAX9203ESA+ when upgrading from MAX903CSA+T for reduced power without layout changes. |
| LM319M/NOPB | Higher 80ns propagation delay, no latch inputs, wider supply range (±15V), higher 40mW power consumption. | Suitable for general-purpose industrial comparators where speed is secondary to ruggedness and supply flexibility. | Choose LM319M/NOPB only for cost-sensitive, non-critical timing applications where latch function is unnecessary. |
Compared with MAX903CSA+T, MAX9203ESA+ offers identical timing and pinout with half the power dissipation, while LM319M/NOPB trades speed and latching for broader supply tolerance and legacy availability-making MAX9203ESA+ the recommended drop-in upgrade and LM319M/NOPB a functional alternative only in low-speed contexts.
Availability
MAX903CSA+T is available at Aetrix Electronics and suitable for high-speed A/D converters, line receivers, threshold detectors, and PWM circuits requiring stable component supply amid long-lifecycle industrial deployments.
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 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 data discrimination tasks demanding nanosecond-level timing precision, low power, and latch-synchronized output capture in multi-channel systems.
FAQ
What is the maximum operating temperature range for MAX903CSA+T?
The MAX903CSA+T is rated for 0°C to +70°C operation, as indicated by the 'C' grade suffix in its ordering code. This commercial-grade temperature range is validated across all electrical specifications including propagation delay, input offset voltage, and latch timing parameters - ensuring reliable performance in office, lab, and non-extreme industrial environments where the MAX903CSA+T is deployed.
Does MAX903CSA+T support single-supply operation?
Yes, MAX903CSA+T supports true single-supply operation: configure VEE = GND, VCC = +5V to +10V, and VDD = +5V. Its input common-mode range extends to the negative rail (VEE), allowing ground-referenced input signals without external level-shifting circuitry - a key design advantage confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.
What is the function of the LATCH pin on MAX903CSA+T?
The LATCH pin (Pin 5) on MAX903CSA+T controls output state retention: when driven logic-low, it freezes the current comparator output (OUT) state regardless of subsequent input changes; returning high releases the latch and restores transparency. This behavior is TTL-compatible (VLH = 1.4–2.0V, VLL = 0.8–1.4V) and is explicitly documented in the Timing Characteristics and Pin Descriptions sections for MAX903CSA+T.
Is MAX903CSA+T pin-compatible with other devices in the MAX900 family?
No - MAX903CSA+T is a quad comparator in 8-pin SO, while MAX900 is 20-pin, MAX901 is 16-pin, and MAX902 is 14-pin. Only MAX903 variants (e.g., MAX903CPA, MAX903ESA) share the same 8-pin SO/DIP pinout. The MAX903CSA+T pin configuration is unique within the family and not interchangeable with MAX900/MAX901/MAX902 packages.
Why is MAX903CSA+T marked 'Not Recommended for New Designs'?
MAX903CSA+T is marked Not Recommended for New Designs because its fabrication process at an external wafer foundry has been discontinued. While fully functional and supported for existing designs, Maxim recommends migrating to the pin-compatible, lower-power MAX9203ESA+ - which matches MAX903CSA+T's speed and SO-8 footprint while cutting power consumption by 50%, as stated in the official QuickView datasheet and replacement guidance.
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:
- Active
- 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.
MAX903CSA+T Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
