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Analog Devices Inc./Maxim Integrated MAX912ESE-T
- Part No.:
- MAX912ESE-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX912ESE-T.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,069
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Product details
Overview
MAX912ESE-T from Maxim Integrated is a dual, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs. It delivers 10ns typical propagation delay, ±5V or single +5V operation, and stable linear-region behavior-enabling high-resolution zero-crossing detection and V/F conversion in industrial power supplies and high-speed sampling circuits.
For engineers reviewing the MAX912ESE-T datasheet, MAX912ESE-T pinout, MAX912ESE-T application, or MAX912ESE-T equivalent, this page provides verified package mapping (16-pin narrow SO), latch-enabled dual-channel timing behavior, input range extending below negative rail, and confirmed alternatives for high-speed comparator selection in ±5V or +5V systems.
Technical Context
The MAX912ESE-T implements a fully differential bipolar input stage with trimmed offset voltage (0.8mV typ) and no built-in hysteresis, enabling true linear-region stability without resolution loss. Its latch-enable architecture (LEA/LEB pins) supports synchronous sampling with 2ns setup and 5ns hold time.
It operates across -40°C to +85°C with supply current of 6mA per comparator at +5V, and features rail-to-rail input common-mode range (–0.2V to +3.5V on single +5V; –5.2V to +3.5V on ±5V), CMRR ≥80dB, and PSRR ≥80dB-making it suitable for noise-sensitive analog-digital boundary applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 10ns typical (ΔVIN = 100mV, VOD = 20mV); enables ≤85MHz signal discrimination in fast pulse-width triggers. |
| Supply Voltage Range | +5V single or ±5V split supply; V+ = 4.5V to +7V, V− = −7V to −0.2V; supports direct integration into legacy ±5V logic systems. |
| Input Offset Voltage | 0.8mV typical at +25°C; ensures sub-millivolt threshold accuracy in precision zero-crossing detectors. |
| Supply Current | 6mA per comparator at +5V; total 12mA for dual channel-critical for low-power switching regulator feedback loops. |
| Common-Mode Input Range | –5.2V to +3.5V (±5V mode); extends 200mV below negative rail-allows direct sensing of negative-going signals without level-shifting. |
| Output Type | Complementary TTL outputs (QA/QA, QB/QB); drives standard 74LS loads directly without external pull-ups. |
| Latch Enable Function | Dedicated LEA/LEB pins with TTL-compatible thresholds (VIH = 2.0V, VIL = 0.8V); enables synchronized capture of transient events in sampling circuits. |
Pinout & Package
MAX912ESE-T is housed in a 16-pin narrow SO (SOICN) package, 3.9mm × 9.9mm body, 1.27mm pitch, RoHS-compliant, with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | QA / QB | TTL output (noninverted) for Comparator A/B; sinks 10mA, sources 4mA; compatible with 74LS logic families. |
| 2, 15 | QA / QB | Complementary TTL output (inverted) for Comparator A/B; enables differential signaling or RS-422-like interface capability. |
| 3, 14 | GND | Logic ground reference; both pins must be connected to system ground to ensure latch integrity and noise immunity. |
| 4, 13 | LEA / LEB | Latch enable for Comparator A/B; high or floating = latched state; low = transparent mode; eliminates metastability in sampled systems. |
| 5, 12 | N.C. | No internal connection; must remain unconnected-no routing or stubs permitted to avoid parasitic coupling. |
| 6 | V− | Negative supply terminal; connects to −5V (dual) or GND (single +5V); bypass with 0.1µF ceramic capacitor for stability. |
| 7, 9 | INA− / INB+ | Inverting input (A) and noninverting input (B); differential pair supports bidirectional signal routing in dual-threshold configurations. |
| 8, 10 | INA+ / INB− | Noninverting input (A) and inverting input (B); full ±15V differential input rating allows robust overvoltage tolerance. |
| 11 | V+ | Positive supply terminal; +5V nominal; powers analog core and TTL outputs; requires local 0.1µF + 10µF bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Stable linear-region operation | Eliminates need for external hysteresis-preserves full input resolution down to DC, unlike oscillating comparators. |
| No minimum input slew-rate requirement | Valid output guaranteed even for slow-moving triangle or sine wave inputs (e.g., 50Hz line sensing), reducing design constraints. | Independent latch controls per channel | LEA and LEB allow asynchronous or synchronized sampling of two independent signals-essential for dual-edge timing capture. |
| Rail-to-rail input common-mode range | Accepts inputs 200mV below V−, enabling direct interfacing with op-amp outputs or sensor bridges referenced to negative rails. |
| Low power at high speed | 6mA/comparator at 10ns delay-achieves 1.7× better speed/power ratio than LT1016, critical for thermally constrained designs. |
Applications
| Zero-Crossing Detectors | Ethernet Line Receivers |
|---|---|
|
Use Scenario: Detecting AC line polarity transitions in smart energy meters and motor phase controllers. IC Role / Device Role / Timing Role: Dual comparator monitors live/neutral lines simultaneously; latch enables precise edge-aligned sampling at zero-voltage crossing. Use Value: 0.8mV offset and linear-region stability eliminate false triggers during slow zero-crossings, improving metering accuracy by >0.1%. |
Use Scenario: Recovering differential data from twisted-pair Ethernet PHY outputs in legacy 10BASE-T receivers. IC Role / Device Role / Timing Role: Converts differential Manchester-encoded signals to TTL-level logic; complementary outputs feed downstream flip-flops. Use Value: 10ns propagation delay and 500ps channel-to-channel skew ensure <10ns timing margin for 10Mbps bit recovery. |
| Switching Regulators | High-Speed Sampling Circuits |
|
Use Scenario: Threshold comparison in peak-current-mode DC-DC controller feedback paths (e.g., buck converters). IC Role / Device Role / Timing Role: Compares sensed inductor current against reference ramp; QA output drives PWM latch reset. Use Value: 6mA supply current minimizes quiescent loss; rail-to-rail input accommodates current-sense amplifier outputs near ground. |
Use Scenario: Triggering ADC sampling windows in digital oscilloscopes and automated test equipment. IC Role / Device Role / Timing Role: Dual comparator detects rising/falling edges of trigger signals; independent LEA/LEB pins gate sample strobes. Use Value: 2ns setup/5ns hold time guarantees jitter <50ps, supporting ≤1GS/s sampling fidelity in time-interleaved architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower (1.3µs propagation delay), no latch, open-collector outputs, no negative supply support. | Suitable only for low-speed, single-supply, non-latched applications like battery monitoring. | Choose LM393DR only when cost is primary constraint and speed/latching are unnecessary. |
| LT1016CS8#PBF | Single-channel, 10ns delay, but higher 6.5mA supply current per comparator and narrower input range (–4.5V to +3.5V). | Lacks dual-channel integration and independent latch control-requires two devices for equivalent functionality. | Prefer MAX912ESE-T when dual-channel synchronization, lower power, or extended input range is required. |
Compared with LM393DR and LT1016CS8#PBF, MAX912ESE-T uniquely combines dual-channel operation, latch-enable per channel, rail-below-negative input capability, and 6mA/comparator power-delivering integrated timing control for high-fidelity sampling and regulation where discrete solutions increase board area and skew.
Availability
MAX912ESE-T is available at Aetrix Electronics and suitable for industrial power supplies, Ethernet physical layer interfaces, and high-speed test equipment requiring stable component supply across –40°C to +85°C operating conditions.
Supply support for MAX912ESE-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 and mixed-signal ICs for industrial, communications, and computing markets.
The MAX912ESE-T belongs to Maxim's precision high-speed comparator product line, designed specifically for applications demanding nanosecond timing accuracy, latch-synchronized sampling, and robust operation in ±5V or single +5V systems.
FAQ
What is the operating temperature range for MAX912ESE-T?
The MAX912ESE-T is rated for operation from –40°C to +85°C, as indicated by the "E" suffix in its part number. This extended industrial temperature range ensures reliable performance in harsh environments such as motor drives, outdoor telecom equipment, and industrial automation controllers where ambient temperatures exceed commercial-grade limits. All electrical specifications-including propagation delay, offset voltage, and supply current-are guaranteed across this full range.
Does MAX912ESE-T support single-supply operation?
Yes, MAX912ESE-T supports single +5V operation: connect V− to GND and V+ to +5V. In this configuration, its input common-mode range is –0.2V to +3.5V-allowing inputs to go 200mV below ground. The device maintains 10ns typical propagation delay and 6mA per comparator supply current under single-supply conditions, making it ideal for modern +5V-only systems without requiring negative rails.
How does the latch function work on MAX912ESE-T?
The MAX912ESE-T features independent latch-enable inputs LEA (Pin 4) and LEB (Pin 13). When either pin is high or floating, the corresponding comparator's output (QA/QA or QB/QB) holds its last valid state; when pulled low, the output becomes transparent and responds immediately to input differential voltage. This allows precise, edge-triggered sampling-e.g., capturing transient events in oscilloscope front-ends-with 2ns setup and 5ns hold time guaranteed.
What is the maximum input differential voltage the MAX912ESE-T can tolerate?
The MAX912ESE-T supports a maximum differential input voltage of ±15V, as specified in its Absolute Maximum Ratings. This rating applies regardless of supply configuration (±5V or +5V/GND) and enables safe interfacing with high-swing sensor outputs or op-amp stages without external clamping. Internally, the input stage uses robust bipolar transistors rated for this stress level, ensuring long-term reliability under transient overvoltage conditions.
Is MAX912ESE-T pin-compatible with other MAX912 variants?
Yes, MAX912ESE-T shares identical pinout and functionality with all other MAX912 variants in the 16-pin narrow SO package (e.g., MAX912CSE, MAX912ESE), differing only in temperature grade and screening. The "E" suffix denotes –40°C to +85°C operation, while "C" indicates 0°C to +70°C. Electrical parameters-including propagation delay, offset voltage, and latch timing-are identical across these variants, enabling drop-in replacement in existing designs requiring extended temperature support.
MAX912ESE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Latch
- Number of Elements:
- 2
- Output Type:
- Complementary, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 10V
- :
- 2mV @ ±5V
- Voltage - Input Offset (Max):
- 5µA @ ±5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 10mA
- Current - Quiescent (Max):
- 110dB CMRR, 100dB PSRR
- CMRR, PSRR (Typ):
- 14ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 16-SOIC
MAX912ESE-T FAQ
1.How can I place an order for MAX912ESE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX912ESE-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 MAX912ESE-T reliable?
The price and inventory of MAX912ESE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX912ESE-T is usually 5 days.
3.What payment methods are accepted for MAX912ESE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX912ESE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX912ESE-T?
MAX912ESE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX912ESE-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 MAX912ESE-T?
For technical support, including MAX912ESE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX912ESE-T requirements.
6.How does Aetrix verify that MAX912ESE-T is sourced from the original manufacturer or authorized distributors?
All MAX912ESE-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 MAX912ESE-T meets industry standards.
7.What is the process for return or replacement of MAX912ESE-T?
All MAX912ESE-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX912ESE-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 MAX912ESE-T part is unused and in its original packaging.
Return procedure for MAX912ESE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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