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Analog Devices Inc./Maxim Integrated MAX912EPE
- Part No.:
- MAX912EPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX912EPE.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,277
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Product details
Overview
The MAX912EPE from Maxim Integrated is a dual, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs, 10ns typical propagation delay, ±5V or single +5V supply operation, and stable linear-region behavior-enabling high-resolution zero-crossing detection and V/F conversion in industrial power control systems.
For engineers reviewing the MAX912EPE datasheet, MAX912EPE pinout, MAX912EPE application, or MAX912EPE equivalent, this page delivers verified electrical parameters, latch-enabled dual-channel timing behavior, temperature-rated (-40°C to +85°C) DIP package details, and real-world substitution guidance for high-speed comparator selection.
Technical Context
The MAX912EPE integrates two independent high-speed comparators sharing a common ±5V or +5V supply architecture, each with TTL-compatible latched outputs controlled by dedicated LEA/LEB pins. Its bipolar process enables 10ns propagation delay with no minimum input slew-rate requirement.
Unlike conventional high-speed comparators, the MAX912EPE remains stable across its entire linear region (−5.2V to +3.5V common-mode range), eliminating oscillation without external hysteresis-preserving resolution for slow-moving signals like triangle-wave inputs in sampling circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 10ns typ (ΔVIN = 100mV, VOD = 5mV); enables ≤85MHz signal discrimination in pulse-width discriminators. |
| Supply Range | Single +5V or dual ±5V; supports industrial systems with split-rail or simplified single-rail power domains. |
| Input Common-Mode Range | −5.2V to +3.5V (±5V supply); extends below negative rail-critical for ground-referenced sensor interfaces. |
| Input Offset Voltage | 0.8mV max at +25°C; ensures <1mV DC error in precision threshold detection for extended-range V/F converters. |
| Supply Current per Comparator | 6mA max (+5V); enables low-power operation in battery-backed or thermally constrained switching regulator feedback loops. |
| Latch Enable Function | Dedicated LEA/LEB pins with TTL-compatible thresholds (VIH = 2.0V, VIL = 0.8V); allows synchronous sampling of analog events in high-speed triggers. |
| Channel Matching | 500ps max channel-to-channel propagation delay skew (MAX912 only); maintains timing integrity in dual-signal edge alignment applications. |
Pinout & Package
MAX912EPE is housed in a 16-pin plastic DIP package (0.300" wide), rated for −40°C to +85°C operation, with through-hole mounting and standard 0.1" pin pitch compatible with legacy prototyping and industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | QA / QB | Comparator A/B TTL output - active-high logic level referenced to V+; drives standard TTL loads directly. |
| 2, 15 | QA / QB | Comparator A/B complementary TTL output - inverted logic state; enables differential signaling or RS-232 level shifting. |
| 3, 14 | GND | Logic ground reference - both pins must be connected to system ground to ensure latch and output stability. |
| 4, 13 | LEA / LEB | Latch enable for Comparator A/B - TTL high or floating latches output; low enables transparent comparison mode. |
| 5, 12 | N.C. | No internal connection - left unconnected; no routing or grounding required. |
| 6 | V− | Negative supply rail - tied to GND for single +5V operation; −5V for dual-supply mode with bypass capacitor. |
| 7, 10 | INA− / INB− | Inverting input for Comparator A/B - accepts signals down to −5.2V (with −5V supply), enabling rail-to-rail sensing. |
| 8, 9 | INA+ / INB+ | Noninverting input for Comparator A/B - supports common-mode voltages up to +3.5V, ideal for mid-supply reference designs. |
| 11 | V+ | Positive supply rail - +5V nominal; powers both analog input stage and digital output drivers; requires 0.1µF ceramic bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Stable linear-region operation | Eliminates need for external hysteresis-preserves full input resolution for low-frequency signals like 50Hz zero-crossing detection. |
| Independent latch controls (LEA/LEB) | Enables asynchronous sampling of two independent analog channels-e.g., simultaneous voltage and current monitoring in switching regulators. |
| No minimum input slew-rate requirement | Validates output even with sub-1V/ms input transitions-critical for triangle-wave-based V/F converters and slow-motion triggers. |
| Wide input common-mode range | Supports direct interface to sensors operating below ground (e.g., current-sense amplifiers with negative-side shunts). |
| Low offset drift (2µV/°C) | Maintains <3mV total offset error over full −40°C to +85°C range-ensuring consistent threshold accuracy in outdoor industrial enclosures. |
Applications
| Zero-Crossing Detectors | Ethernet Line Receivers |
|---|---|
|
Use Scenario: Detecting AC line voltage polarity transitions in smart energy meters and solid-state relays. IC Role / Device Role / Timing Role: Dual comparator monitors live/neutral lines simultaneously; LEA/LEB synchronize zero-cross capture to microcontroller timer interrupts. Use Value: 10ns delay and linear-region stability eliminate false triggers during slow zero crossings, improving metering accuracy by >0.5%. |
Use Scenario: Recovering differential data from twisted-pair Ethernet PHY outputs in legacy 10BASE-T receivers. IC Role / Device Role / Timing Role: MAX912EPE compares differential pair (IN+ vs IN−) to generate clean TTL-level data strobes synchronized to clock recovery. Use Value: −5.2V to +3.5V input range accommodates PHY output swings beyond rail, avoiding clipping in noisy industrial environments. |
| Switching Regulators | High-Speed Sampling Circuits |
|
Use Scenario: Implementing peak-current-mode control in DC-DC converters using inductor current sensing. IC Role / Device Role / Timing Role: One comparator monitors current sense voltage against ramp reference; second latches fault condition on overcurrent event. Use Value: 6mA supply current per comparator reduces auxiliary power loss; latch function holds fault state until controller reset. |
Use Scenario: Digitizing analog waveforms in oscilloscope front-ends and automated test equipment. IC Role / Device Role / Timing Role: Dual comparators sample rising/falling edges of input signal; LEA/LEB aligned to ADC sampling clock for precise time-of-flight measurement. Use Value: 500ps channel matching ensures <100ps timing skew between sampled edges-critical for 100MS/s equivalent-time sampling. |
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 |
|---|---|---|---|
| LM393DR | Slower (1.3µs propagation delay), no latch, single +5V only, higher offset (7mV), no linear-region stability. | Suitable for basic window comparators or power-on reset; not viable for high-speed sampling or zero-crossing with slow edges. | Select LM393DR only when cost is primary constraint and speed/resolution requirements are relaxed. |
| TLV3501CDR | Faster (4.5ns), rail-to-rail input, no latch, CMOS output, lower supply current (1.3mA), but unstable in linear region. | Preferred for ultra-low-power portable instruments; requires external hysteresis for reliable zero-crossing, reducing resolution. | Choose TLV3501CDR when nanosecond speed is mandatory and hysteresis can be added; avoid where linear-region fidelity is critical. |
Compared with LM393DR and TLV3501CDR, the MAX912EPE uniquely combines 10ns speed, latch functionality, linear-region stability, and −40°C to +85°C DIP packaging-making it the only option for industrial-grade dual-channel high-resolution timing without design compromises.
Availability
MAX912EPE is available at Aetrix Electronics and suitable for switching regulators, zero-crossing detectors, and high-speed sampling circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX912EPE 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 MAX912EPE belongs to Maxim's precision high-speed comparator product line, engineered specifically for applications demanding nanosecond timing accuracy, latch synchronization, and robust operation across industrial temperature extremes.
FAQ
What is the operating temperature range for the MAX912EPE?
The MAX912EPE is specified for −40°C to +85°C operation, validated across the full range for propagation delay, input offset voltage, and latch functionality. This extended temperature rating makes the MAX912EPE suitable for deployment in industrial motor drives, outdoor power electronics, and automotive under-hood modules where ambient conditions exceed commercial-grade limits.
Does the MAX912EPE require external hysteresis for stable operation?
No, the MAX912EPE does not require external hysteresis. Its proprietary architecture ensures stable output behavior even when inputs reside in the linear region-unlike most high-speed comparators that oscillate near zero differential voltage. Adding hysteresis to the MAX912EPE degrades resolution and is explicitly discouraged in the datasheet.
Can the MAX912EPE operate from a single +5V supply?
Yes, the MAX912EPE supports single +5V supply operation: connect V− to GND and V+ to +5V. In this configuration, the input common-mode range is −0.2V to +3.5V, and output levels remain fully TTL-compatible. The device draws 6mA per comparator, making it suitable for low-power +5V systems such as PLC I/O modules.
What is the purpose of the LEA and LEB pins on the MAX912EPE?
The LEA and LEB pins provide independent TTL-compatible latch control for each comparator channel. When pulled high or left floating, QA/QB outputs hold their last valid state; when pulled low, the outputs respond transparently to input differentials. This enables synchronized sampling of two analog signals-e.g., voltage and current in a switching regulator-without software intervention.
How does the MAX912EPE compare to the MAX913 in terms of functionality?
The MAX912EPE is the dual-channel counterpart to the single-channel MAX913, sharing identical per-comparator performance: 10ns propagation delay, ±5V/+5V supply flexibility, linear-region stability, and latch capability. The MAX912EPE adds independent LEA/LEB controls and channel-to-channel matching (500ps skew), making it optimal for correlated dual-signal applications where the MAX913 would require duplication.
MAX912EPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 16-PDIP
MAX912EPE FAQ
1.How can I place an order for MAX912EPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX912EPE 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 MAX912EPE reliable?
The price and inventory of MAX912EPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX912EPE is usually 5 days.
3.What payment methods are accepted for MAX912EPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX912EPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX912EPE?
MAX912EPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX912EPE 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 MAX912EPE?
For technical support, including MAX912EPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX912EPE requirements.
6.How does Aetrix verify that MAX912EPE is sourced from the original manufacturer or authorized distributors?
All MAX912EPE 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 MAX912EPE meets industry standards.
7.What is the process for return or replacement of MAX912EPE?
All MAX912EPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX912EPE, 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 MAX912EPE part is unused and in its original packaging.
Return procedure for MAX912EPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX912EPE Tags
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LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
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LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
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