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Analog Devices Inc./Maxim Integrated MAX902CSD-T
- Part No.:
- MAX902CSD-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX902CSD-T.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,079
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Product details
Overview
MAX902CSD-T from Maxim Integrated is a high-speed, low-power dual voltage comparator with differential analog inputs, TTL-compatible outputs, independent latch inputs, and separate analog/digital supply rails. It delivers 8ns typical propagation delay at 5mV overdrive, consumes 18mW per comparator at +5V, and supports input common-mode range extending to the negative rail - enabling ground-sensing operation in single-supply systems such as high-speed A/D converter front-ends and line receivers.
For engineers reviewing the MAX902CSD-T datasheet, MAX902CSD-T pinout, MAX902CSD-T application, or MAX902CSD-T equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options for legacy design support and migration planning.
Technical Context
The MAX902CSD-T implements two independent high-gain, wide-bandwidth comparators with internal active pull-ups on TTL outputs and dedicated latch control per channel. Its analog input stage accepts common-mode voltages from VEE − 0.1V to VCC − 2.25V, and its latch inputs (pins 4 and 11) enable synchronous capture of comparator states with 10ns minimum disable pulse width and 2ns setup/1ns hold timing.
It operates from split ±5V analog supplies (VEE = −5V, VCC = +5V) or single +5V analog supply (VEE = GND), while requiring fixed +5V digital supply (VDD). Power dissipation is 35mW typical across both channels at +5V, with output drive capability of 1mA source / 8mA sink into TTL loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 8ns typical at 5mV overdrive - enables sampling of >100MHz signals in A/D interfaces and fast edge detection. |
| Input Offset Voltage | 1–3mV max over temperature - ensures accurate threshold discrimination in precision trigger circuits. |
| Power Dissipation | 35mW typical (both channels @ +5V) - supports thermally constrained PCB layouts in dense mixed-signal systems. |
| Supply Flexibility | Analog supply: +5V to +10V or ±5V; Digital supply: +5V only - allows isolation of analog and digital grounds in noise-sensitive applications. |
| Input Common-Mode Range | Extends to VEE − 0.1V - permits ground-referenced sensing in single-supply configurations without level-shifting. |
| Latch Timing | 10ns min latch-disable pulse width, 2ns setup / 1ns hold - supports tight synchronization with system clocks in sampled-data systems. |
| Output Drive | TTL-compatible: VOH ≥ 2.4V @ 1mA, VOL ≤ 0.4V @ 8mA - directly interfaces with LS-TTL and standard logic families without buffers. |
Pinout & Package
Narrow SO-14 package (JEDEC MS-012AC), 14-pin surface-mount, body size 8.65mm × 3.90mm, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | IN− (A, B) | Negative input terminals for Channel A and Channel B - differential pair inputs accepting common-mode range down to VEE − 0.1V. |
| 2, 9 | IN+ (A, B) | Positive input terminals for Channel A and Channel B - used with IN− to define comparison thresholds. |
| 3 | GND | Digital ground reference - connects to system DGND; must be decoupled separately from analog ground. |
| 4, 11 | LATCH (A, B) | Asynchronous latch enable inputs per channel - low level freezes output state; high level enables transparent operation. |
| 5, 12 | OUT (A, B) | TTL-compatible open-collector outputs with internal pull-up - drive standard TTL loads with fan-out of four. |
| 6, 13 | N.C. | No internal connection - must remain unconnected; no routing or grounding required. |
| 7 | VEE | Negative analog supply and substrate terminal - sets lower rail for analog section; may be grounded for single-supply use. |
| 10 | VDD | +5V digital supply - powers TTL output stages and latch logic; requires dedicated 100nF ceramic decoupling. |
| 14 | VCC | Positive analog supply - ranges from +5V to +10V; powers comparator core; requires separate 100nF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| 8ns propagation delay | Enables reliable sampling of fast transients in high-speed data acquisition and clock recovery circuits. |
| Independent per-channel latches | Allows synchronized capture of two independent analog events without inter-channel timing skew. |
| Separate analog/digital supplies | Reduces digital switching noise coupling into analog inputs - critical in mixed-signal measurement systems. |
| Input range includes negative rail | Eliminates need for external biasing when monitoring bipolar or ground-referenced signals in single-supply designs. |
| TTL-compatible outputs | Directly drives standard logic families without level-shifting or external pull-ups, simplifying interface design. |
Applications
| High-Speed A/D Converter Front-End | Line Receiver with Threshold Detection |
|---|---|
Use Scenario: Digitizing analog waveforms at >50MSPS using flash or pipeline ADC architectures. IC Role / Device Role / Timing Role: Dual comparator acts as high-speed window comparator or track-and-hold enable generator, synchronizing sampling with precise input overdrive margins. Use Value: 8ns propagation delay ensures minimal aperture uncertainty; latch inputs allow strobing of conversion windows aligned to system clock edges. |
Use Scenario: Recovering digital data from noisy RS-422/RS-485 differential lines in industrial communication links. IC Role / Device Role / Timing Role: Dual comparator compares received differential signal against programmable thresholds to regenerate clean logic levels. Use Value: Input common-mode range including VEE enables direct interfacing to ±5V bus voltages; TTL outputs drive FPGA I/O banks without translation. |
| PWM Signal Monitoring | Threshold Detector in Alarm Systems |
Use Scenario: Real-time validation of PWM duty cycle and frequency in motor control feedback loops. IC Role / Device Role / Timing Role: One comparator monitors rising edge, the other falling edge of PWM signal to derive timing metrics. Use Value: Sub-10ns delay preserves edge integrity for accurate period measurement; latch inputs freeze captured edge timestamps for microcontroller readout. |
Use Scenario: Monitoring eight sensor outputs via multiplexed inputs in environmental monitoring equipment. IC Role / Device Role / Timing Role: Dual comparator pairs (with external DAC) implement upper/lower alarm limits for analog sensor channels. Use Value: Low 1–3mV offset ensures stable trip points; separate analog/digital supplies prevent false alarms from digital noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9202CSD-T | Pin-for-pin compatible, same 8ns propagation delay, but 17.5mW/channel (half power vs. MAX902). | Designed for new designs; supports identical SO-14 footprint and supply schemes; replaces MAX902 where lower power is critical. | Select MAX9202CSD-T for new designs requiring same speed with reduced thermal load and improved efficiency. |
| LM319M/NOPB | Slower (80ns propagation), higher power (40mW), no latch inputs, single +5V only - no separate VDD/VEE support. | Suitable for cost-sensitive, non-critical timing applications where latch synchronization and split supplies are unnecessary. | Choose LM319M/NOPB only if timing budget allows >80ns delay and system lacks separate analog/digital supply domains. |
Compared with MAX902CSD-T, MAX9202CSD-T offers identical speed and pinout with 50% lower power, making it the preferred upgrade path; LM319M/NOPB trades speed, latch capability, and supply flexibility for cost and availability in less demanding applications.
Availability
MAX902CSD-T is available at Aetrix Electronics and suitable for high-speed data acquisition, industrial line receiver, and PWM monitoring applications requiring stable component supply during legacy system maintenance and long-life production.
Supply support for MAX902CSD-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 for high-speed, low-power voltage comparison in time-critical mixed-signal systems - emphasizing propagation delay consistency, latch synchronization, and supply-domain isolation.
FAQ
What is the operating temperature range for MAX902CSD-T?
The MAX902CSD-T is rated for 0°C to +70°C ambient operation (Commercial grade), as confirmed by the ordering information table listing "MAX902CSD" with "C" suffix denoting the 0°C to +70°C range. This specification applies to all electrical parameters unless otherwise noted in the datasheet's full-temperature test conditions.
Does MAX902CSD-T support single-supply operation?
Yes, MAX902CSD-T supports single-supply operation with VEE grounded and VCC supplied at +5V to +10V. Its input common-mode range extends to VEE − 0.1V, enabling ground-referenced inputs. The digital supply VDD remains fixed at +5V regardless of analog supply configuration.
What is the function of pins 6 and 13 on MAX902CSD-T?
Pins 6 and 13 on MAX902CSD-T are No Connection (N.C.) terminals - they are not bonded internally and must remain unconnected in the PCB layout. Neither routing nor grounding is required, and connecting them may cause unintended behavior or damage.
Is MAX902CSD-T pin-compatible with MAX9202CSD-T?
Yes, MAX9202CSD-T is explicitly documented as pin-for-pin compatible with MAX902CSD-T, sharing identical SO-14 pinout, supply connections (VCC, VEE, VDD, GND), and signal assignments (IN+, IN−, OUT, LATCH). This compatibility enables drop-in replacement in existing layouts.
Why is MAX902CSD-T marked "Not Recommended for New Designs"?
MAX902CSD-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 legacy systems, Maxim recommends MAX9202CSD-T as the designated replacement offering identical performance with half the power consumption and ongoing manufacturing support.
MAX902CSD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Latch
- Number of Elements:
- 2
- 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):
- 8mA, 6mA, 3mA
- 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
- :
- 14-SOIC
MAX902CSD-T FAQ
1.How can I place an order for MAX902CSD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX902CSD-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 MAX902CSD-T reliable?
The price and inventory of MAX902CSD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX902CSD-T is usually 5 days.
3.What payment methods are accepted for MAX902CSD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX902CSD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX902CSD-T?
MAX902CSD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX902CSD-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 MAX902CSD-T?
For technical support, including MAX902CSD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX902CSD-T requirements.
6.How does Aetrix verify that MAX902CSD-T is sourced from the original manufacturer or authorized distributors?
All MAX902CSD-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 MAX902CSD-T meets industry standards.
7.What is the process for return or replacement of MAX902CSD-T?
All MAX902CSD-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX902CSD-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 MAX902CSD-T part is unused and in its original packaging.
Return procedure for MAX902CSD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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