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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:1,507
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Product details
Overview
MAX902CSD+T from Maxim Integrated is a dual high-speed, low-power voltage comparator with differential analog inputs and TTL-compatible outputs featuring independent latch inputs. It delivers 8ns typical propagation delay at 5mV overdrive, consumes 35mW total (17.5mW per comparator) at +5V supplies, and supports ±5V or single +5V analog operation with input common-mode range extending to the negative rail. It is used in high-speed A/D converter front-ends and line receiver circuits requiring precise, fast threshold detection.
For engineers reviewing the MAX902CSD+T datasheet, MAX902CSD+T pinout, MAX902CSD+T application, or MAX902CSD+T equivalent, this page provides verified functional identity, confirmed dual-comparator topology, latch-enabled timing behavior, supply flexibility (+5V analog/digital, ±5V analog), 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 TTL-output stages and dedicated latch inputs per channel. Its architecture supports separate analog (VCC/VEE) and digital (VDD) supplies, enabling noise isolation in mixed-signal systems. Input common-mode range includes VEE (–5V), allowing ground-referenced sensing in single-supply configurations.
Propagation delay is specified at 8ns (typ) for both rising and falling edges under 5mV overdrive into 15pF load, with <2ns inter-channel skew (∆tpd). Latch functionality holds output states on low-going latch inputs, with defined setup/hold times (2ns/1ns) and disable-to-output delays (10ns/12ns), making it suitable for synchronized sampling in data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 8ns typical at 5mV overdrive - enables sampling of >100MHz signals with minimal timing uncertainty. |
| Power Dissipation | 35mW total at VCC = VDD = +5V, VEE = –5V - supports thermally constrained PCB layouts. |
| Input Common-Mode Range | VEE – 0.1V to VCC – 2.25V - allows direct ground-sensing when VEE = 0V and VCC = +5V. |
| Output Logic Type | TTL-compatible with VOH ≥ 2.4V (1mA source), VOL ≤ 0.4V (8mA sink) - interfaces directly with 74LS/ALS logic families. |
| Latch Input Compatibility | VLH ≥ 1.4V, VLL ≤ 1.4V - ensures reliable control from standard TTL or CMOS logic drivers. |
| Supply Flexibility | Analog supply: +5V to +10V (VEE = GND) or ±5V; Digital supply: fixed +5V (VDD) - accommodates diverse system power architectures. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade industrial and instrumentation applications. |
Pinout & Package
MAX902CSD+T is housed in a 14-pin narrow SOIC (SO) package with exposed pad, footprint compatible with industry-standard 14-SOIC-N (0.154" width). Pin 1 is marked by notch or dot; device orientation follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | IN− (A, B) | Negative input terminals for comparator channels A and B - differential pair inputs referenced to internal offset voltage. |
| 2, 9 | IN+ (A, B) | Positive input terminals for comparator channels A and B - accept signals up to VCC – 2.25V or VEE – 0.1V. |
| 3 | GND | Digital ground reference - connects to system DGND; separates from analog substrate (VEE). |
| 4, 11 | LATCH (A, B) | Asynchronous latch enable inputs - low level freezes current output state; high level enables real-time comparison. |
| 5, 12 | OUT (A, B) | TTL-compatible open-collector outputs with internal pull-up - drive loads up to 4 LS-TTL units. |
| 6, 13 | N.C. | No internal connection - must be left unconnected or tied to GND for mechanical stability only. |
| 7 | VEE | Negative analog supply and substrate terminal - sets lower bound of input common-mode range; must be ≤ VCC – 10V. |
| 10 | VDD | +5V digital supply - powers TTL output stages and latch logic; not tolerant of voltage variation beyond ±5%. |
| 14 | VCC | Positive analog supply - sets upper bound of input range; supports +5V to +10V operation with VEE = GND. |
Key Features
| Feature | Design Value |
|---|---|
| 8ns propagation delay | Enables accurate sampling of fast transients in A/D converter clocking and pulse-width modulation feedback loops. |
| Independent per-channel latches | Allows asynchronous capture of two distinct signal thresholds without cross-talk or timing dependency between channels. |
| Input range includes negative rail | Permits direct interface to bipolar sensors or AC-coupled signals without level-shifting circuitry when VEE = 0V. |
| Separate analog/digital supplies | Reduces digital switching noise coupling into analog inputs - critical for precision threshold detection in noisy environments. |
| TTL-compatible outputs | Eliminates need for external level translators when driving legacy logic families or microcontroller GPIOs with TTL input thresholds. |
Applications
| High-Speed A/D Converter Front-End | Line Receiver with Threshold Detection |
|---|---|
Use Scenario: Fast analog-to-digital conversion using flash or pipeline architectures where comparator decision latency directly limits sampling rate. IC Role / Device Role / Timing Role: Dual comparator providing parallel threshold comparisons for multi-bit encoding; latches synchronize decisions to system clock edge. Use Value: 8ns propagation delay ensures sub-125MHz sampling capability; latch inputs align output capture with master clock, reducing aperture jitter. |
Use Scenario: Receiving differential or single-ended digital signals over long traces or cables subject to attenuation and noise. IC Role / Device Role / Timing Role: High-speed threshold detector converting degraded analog waveforms into clean TTL-level logic signals. Use Value: Input common-mode range down to VEE allows robust detection of signals referenced to chassis ground; 8ns response minimizes intersymbol interference. |
| PWM Feedback Comparator | Programmable Alarm Monitor |
Use Scenario: Real-time comparison of sensed current/voltage against reference in switch-mode power supply feedback paths. IC Role / Device Role / Timing Role: Dual comparator comparing error amplifier output against ramp generator to generate PWM duty cycle. Use Value: Low 35mW total dissipation avoids thermal drift in compact power modules; latch inputs freeze fault conditions for diagnostic logging. |
Use Scenario: Monitoring multiple sensor outputs (e.g., temperature, pressure) against programmable thresholds in industrial controllers. IC Role / Device Role / Timing Role: One MAX902CSD+T channel compares sensor output to DAC-generated upper limit; second channel checks lower limit. Use Value: Independent latches allow simultaneous capture of over/under events; TTL outputs interface directly to microcontroller interrupt pins. |
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 |
|---|---|---|---|
| MAX9202ESA+ | Pin-for-pin compatible; 8ns propagation delay; 17mW total power (half of MAX902CSD+T); no latch inputs. | Requires external latch or microcontroller synchronization; better suited for new designs prioritizing power efficiency over latch control. | Select when migrating from MAX902CSD+T and latch functionality is unnecessary or implemented digitally. |
| LM393DR | General-purpose dual comparator; 1.3µs propagation delay; 0.4mW total power; no latch; rail-to-rail input; open-collector output. | Not suitable for >1MHz signal discrimination; lacks speed and latch features but offers wider supply range and lower cost. | Select only for low-frequency threshold detection where speed and latch are irrelevant. |
Compared with MAX902CSD+T, MAX9202ESA+ delivers identical speed at half the power but removes latch control-requiring redesign of timing-critical capture logic-while LM393DR trades all high-speed advantages for ultra-low power and cost, limiting use to non-critical DC or low-frequency monitoring.
Availability
MAX902CSD+T is available at Aetrix Electronics and suitable for high-speed data acquisition, industrial line receiver systems, and PWM feedback control requiring stable component supply across extended product lifecycles.
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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX900–MAX903 family was designed for high-speed, low-power threshold discrimination in data conversion, communication, and real-time control systems-prioritizing nanosecond timing accuracy and supply flexibility over feature integration.
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). This range is confirmed in the Ordering Information table and applies to all electrical specifications unless otherwise noted. The device is not qualified for extended industrial (–40°C to +85°C) operation; for that, the MAX902ESD variant must be selected. Thermal derating begins above +100°C per Absolute Maximum Ratings.
Does MAX902CSD+T support single-supply operation?
Yes, MAX902CSD+T supports single-supply operation with VEE = GND and VCC = +5V to +10V. In this configuration, the input common-mode range extends from 0V (GND) to VCC – 2.25V, enabling ground-referenced signal detection. The digital supply VDD remains fixed at +5V. This is explicitly documented in the Applications Information section and Electrical Characteristics notes.
What is the function of the N.C. pins on MAX902CSD+T?
Pins 6 and 13 of MAX902CSD+T are designated N.C. (No Connection) - they have no internal bond wire or circuit connection. Per Maxim's Pin Descriptions table, these pins must remain unconnected. While some layouts tie them to GND for mechanical reinforcement, doing so provides no electrical benefit and risks unintended coupling if routed near sensitive analog traces.
Can MAX902CSD+T drive standard TTL logic loads directly?
Yes, MAX902CSD+T outputs are TTL-compatible with VOH ≥ 2.4V (1mA source) and VOL ≤ 0.4V (8mA sink), meeting LS-TTL fan-out requirements. Each output can drive up to four LS-TTL inputs without external pull-ups. This is verified in the Electrical Characteristics table under Output High/Low Voltage parameters and confirmed in the Applications Information section.
Is MAX902CSD+T recommended for new designs?
No - Maxim explicitly states "Not Recommended for New Designs" due to discontinuation of the legacy wafer process. While MAX902CSD+T remains available for existing designs and legacy support, Maxim recommends the pin-compatible MAX9202ESA+ for new projects, offering identical speed and half the power consumption. This status is declared in the General Description section of the datasheet.
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:
- Active
- 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.
MAX902CSD+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.
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