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Analog Devices Inc./Maxim Integrated MAX902CSD
- Part No.:
- MAX902CSD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX902CSD.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,713
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Product details
Overview
MAX902CSD 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 18mW per comparator at +5V, supports ±5V or +5V/+10V analog supplies with negative-rail input sensing, and operates from 0°C to +70°C in a 14-pin narrow SO package - ideal for high-speed A/D converter front-ends and line receivers.
For engineers reviewing the MAX902CSD datasheet, MAX902CSD pinout, MAX902CSD application, or MAX902CSD equivalent, key selection criteria include latch-enabled output hold timing (tpd+(D) = 10ns typ), input offset voltage (1–3mV over temperature), dual-supply isolation capability (separate VCC/VEE analog and VDD digital rails), and compatibility with fast sampling circuits requiring sub-10ns response.
Technical Context
The MAX902CSD implements two independent high-gain comparators with TTL-output stages optimized for four LS-TTL loads, each equipped with a dedicated TTL-compatible latch input that freezes output state on logic-low assertion. Its analog input common-mode range extends to the negative supply rail (VEE), enabling ground-referenced sensing in single-supply configurations.
It supports mixed-supply operation: analog section powered by VCC (+5V to +10V) and VEE (–5V or GND), digital section powered by VDD (+5V only). Propagation delay symmetry (Δtpd ≤ 3ns max between channels) and tight input offset drift (±0.5mV/°C typical) ensure matched channel behavior critical for differential threshold detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 8ns typ (5mV overdrive, CL = 15pF) - enables sampling at >100MHz effective rates |
| Input Offset Voltage | 1–3mV (full temp range) - ensures accurate threshold discrimination down to ~2mV resolution |
| Power Dissipation | 18mW per comparator at +5V - allows dual-channel operation within 36mW total at room temperature |
| Analog Supply Range | +5V to +10V (VCC) or ±5V (VCC/VEE) - supports both single-supply ground-sensing and split-rail precision designs |
| Latch Disable Delay | tpd+(D) = 10ns typ - defines minimum time from latch release to valid output transition |
| Input Common-Mode Range | VEE – 0.1V to VCC – 2.25V - permits direct connection to 0V-referenced sensors without level-shifting |
| Output Drive | VOH = 2.4V min (ISRC = 1mA), VOL = 0.4V max (ISINK = 8mA) - meets TTL logic thresholds under load |
Pinout & Package
MAX902CSD is housed in a 14-pin narrow SOIC (SO) package with exposed pad not electrically connected. Pin functions are validated per Maxim's official pin configuration diagram for MAX902.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN− (A) | Negative input of Channel A - referenced to VEE; accepts signals down to VEE − 0.1V |
| 2 | IN+ (A) | Positive input of Channel A - differential pair with Pin 1; defines threshold crossing point |
| 3 | GND | Digital ground reference - separate from analog VEE; must be tied to system DGND |
| 4 | LATCH (A) | TTL-compatible enable for Channel A output - low = latched, high = transparent |
| 5 | OUT (A) | Channel A TTL output - drives LS-TTL loads directly; active pull-up structure |
| 6 | N.C. | No internal connection - must remain unconnected per datasheet |
| 7 | VEE | Negative analog supply and substrate - sets lower bound of input common-mode range |
| 8 | VDD | +5V digital supply - powers latch circuitry and output stage; not adjustable |
| 9 | IN+ (B) | Positive input of Channel B - electrically isolated from Channel A; identical specs |
| 10 | IN− (B) | Negative input of Channel B - forms second independent differential comparator |
| 11 | LATCH (B) | TTL-compatible enable for Channel B output - independently controllable from Pin 4 |
| 12 | OUT (B) | Channel B TTL output - fully decoupled from Channel A; supports asynchronous latching |
| 13 | N.C. | No internal connection - must remain unconnected per datasheet |
| 14 | VCC | Positive analog supply - sets upper bound of input range; adjustable from +5V to +10V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators with latch control | Enables synchronized capture of two analog events without cross-talk or shared timing constraints |
| 8ns typical propagation delay | Supports real-time decision-making in high-speed data acquisition systems sampling at ≥100MSPS |
| Input range includes negative rail (VEE) | Eliminates need for external level shifters when interfacing with 0V-referenced transducers or DACs |
| Separate analog (VCC/VEE) and digital (VDD) supplies | Prevents digital switching noise from corrupting analog threshold detection in mixed-signal PCB layouts |
| TTL-compatible outputs and latch inputs | Direct interface with legacy FPGA I/O banks, microcontroller GPIO, and standard logic families without buffers |
Applications
| High-Speed A/D Converters | Line Receivers |
|---|---|
Use Scenario: Front-end threshold comparison in flash or pipeline ADC architectures where comparator speed limits overall conversion rate. IC Role / Device Role / Timing Role: Dual-channel voltage discriminator generating parallel decision bits; latch inputs synchronize sampling to clock edges. Use Value: 8ns propagation delay enables ≥125MSPS effective sampling; matched tpd between channels minimizes aperture uncertainty in multi-bit encoding. |
Use Scenario: Differential signal recovery in industrial RS-422/RS-485 receiver stages operating in noisy EMI environments. IC Role / Device Role / Timing Role: High-speed differential comparator converting twisted-pair voltage differences into clean TTL logic levels. Use Value: Input common-mode range extending to VEE allows direct termination at ground; 18mW/channel enables dense multi-channel receiver designs. |
| Threshold Detectors | PWM Circuits |
Use Scenario: Precision over/under-voltage monitoring in DC power supplies or battery management systems with programmable trip points. IC Role / Device Role / Timing Role: Dual comparator implementing independent high/low threshold windows; latch inputs freeze alarm states for host MCU readout. Use Value: 1–3mV input offset ensures trip-point accuracy better than 0.1% at 3V reference; separate VCC/VEE rails reject supply ripple coupling. |
Use Scenario: Edge-triggered PWM generation in motor control ICs where comparator output directly gates power FET drivers. IC Role / Device Role / Timing Role: Fast comparator comparing sawtooth ramp against control voltage; latch input captures duty-cycle edge timing. Use Value: 10ns latch-disable delay ensures precise edge alignment; TTL output drives gate drivers without level translation. |
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 | Pin-for-pin compatible; same 8ns propagation delay but 9mW/comparator (half power); no latch inputs | Requires external latch or FPGA-based capture logic; better suited for continuous high-speed comparison without state hold | Select when power budget is constrained and latch functionality is implemented digitally |
| LM393DR | Slower (300ns propagation delay), no latch, open-collector output, wider supply range (2–36V), no separate VDD | Applicable in low-speed industrial threshold detection where TTL drive and latch timing are unnecessary | Select for cost-sensitive, non-critical timing applications with relaxed speed requirements |
Compared with MAX902CSD, MAX9202CSD offers identical speed and layout compatibility at half the power but sacrifices latch control, while LM393DR provides broad supply flexibility and lower cost at the expense of >35× slower response and no integrated latching - making MAX902CSD uniquely suited for time-critical, latch-synchronized dual-channel discrimination.
Availability
MAX902CSD is available at Aetrix Electronics and suitable for high-speed A/D converters, line receivers, and threshold detectors requiring stable component supply across industrial temperature ranges and long-lifecycle production programs.
Supply support for MAX902CSD 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 specifically for high-speed data acquisition systems requiring sub-10ns comparator response, rail-to-rail input sensing, and integrated latch control - targeting A/D converter interfaces, V/F converters, and precision timing discriminators.
FAQ
What is the maximum operating temperature range for the MAX902CSD?
The MAX902CSD is specified for 0°C to +70°C ambient operation, as indicated by the 'C' suffix in its ordering code. This commercial-grade temperature range is validated across all electrical parameters including propagation delay, input offset voltage, and latch timing. The MAX902CSD does not support extended industrial temperatures; for –40°C to +85°C operation, the MAX902ESD variant must be selected. All thermal derating and reliability data apply strictly within this 0°C to +70°C window.
Does the MAX902CSD require separate analog and digital power supplies?
The MAX902CSD can operate with either separate analog (VCC/VEE) and digital (VDD) supplies or a single +5V supply applied to VCC and VDD while grounding VEE. Its architecture explicitly supports both configurations: separate supplies isolate analog threshold detection from digital switching noise, while single-supply mode simplifies power design for ground-referenced applications. The VDD pin must always be +5V; VCC may range from +5V to +10V, and VEE may be –5V or 0V depending on input range needs.
What is the function of the N.C. pins on the MAX902CSD?
Pins 6 and 13 of the MAX902CSD are designated N.C. (No Connection) and contain no internal bond wires or circuitry. These pins must remain unconnected in PCB layout - neither tied to ground, power, nor left floating - to prevent parasitic coupling or mechanical stress on the die. Maxim's datasheet explicitly prohibits routing traces or placing vias on these pads. Their presence accommodates package compatibility across the MAX900–MAX903 family but serves no electrical purpose in the MAX902CSD.
Can the MAX902CSD drive standard TTL logic loads directly?
Yes, the MAX902CSD features integrated active pull-up TTL-compatible outputs capable of driving up to four LS-TTL loads per channel, as confirmed by VOH ≥ 2.4V (at ISRC = 1mA) and VOL ≤ 0.4V (at ISINK = 8mA). Its output stage eliminates the need for external pull-up resistors in most digital interfacing scenarios. However, for fan-out exceeding four LS-TTL units or interfacing with higher-current CMOS families, an external buffer is recommended to maintain timing integrity and voltage margins.
Is the MAX902CSD still recommended for new designs?
No - the MAX902CSD is marked "Not Recommended for New Designs" due to discontinuation of its underlying wafer fabrication process. While fully functional and supported for existing designs, Maxim recommends migrating to the pin-compatible MAX9202CSD for new projects, which delivers identical speed (8ns propagation delay) at half the power (9mW/comparator) and same 14-pin narrow SO package. Legacy design support, datasheets, and limited inventory remain available through authorized distributors.
MAX902CSD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MAX902CSD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX902CSD 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 reliable?
The price and inventory of MAX902CSD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX902CSD is usually 5 days.
3.What payment methods are accepted for MAX902CSD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX902CSD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX902CSD?
MAX902CSD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX902CSD 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?
For technical support, including MAX902CSD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX902CSD requirements.
6.How does Aetrix verify that MAX902CSD is sourced from the original manufacturer or authorized distributors?
All MAX902CSD 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 meets industry standards.
7.What is the process for return or replacement of MAX902CSD?
All MAX902CSD units undergo pre-shipment inspection (PSI). If there is an issue with MAX902CSD, 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 part is unused and in its original packaging.
Return procedure for MAX902CSD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX902CSD 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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