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Analog Devices Inc./Maxim Integrated MAX912CPE
- Part No.:
- MAX912CPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX912CPE.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,607
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Product details
Overview
The MAX912CPE 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-ideal for high-speed switching regulators and V/F converters.
For engineers reviewing the MAX912CPE datasheet, MAX912CPE pinout, MAX912CPE application, or MAX912CPE equivalent, this device offers latch-enabled dual-channel comparison with sub-1mV offset, rail-to-rail input capability below the negative rail, and guaranteed stability without hysteresis-critical for zero-crossing detection and fast pulse discrimination.
Technical Context
The MAX912CPE implements two independent high-speed comparators in a single 16-pin plastic DIP package, each featuring fully differential bipolar input stages trimmed for <0.8mV offset at +25°C and common-mode input range extending to −0.2V (single +5V) or −5.2V (±5V). Its latch-enable architecture allows synchronous sampling of analog inputs without external timing logic.
Unlike conventional high-speed comparators, the MAX912CPE eliminates oscillation in the linear region via internal design-enabling accurate resolution of slow-moving or low-slew-rate signals without added hysteresis, which would degrade input resolution. Each comparator draws only 6mA per channel from +5V and supports TTL-compatible output drive into 10mA loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 10ns typical (ΔVIN = 100mV, VOD = 20mV); enables ≤85MHz signal sampling with 20mV overdrive. |
| Input Offset Voltage | 0.8mV max at +25°C; ensures high-resolution discrimination of small differential signals. |
| Supply Range | Single +5V (4.5V–5.5V) or dual ±5V; supports industrial and telecom power architectures. |
| Input Common-Mode Range | −0.2V to +3.5V (single +5V); extends 200mV below ground-critical for ground-referenced sensing. |
| Output Type | Complementary TTL (QA/QA, QB/QB); drives standard logic without level-shifting. |
| Latch Enable Function | Dedicated LEA/LEB pins per channel; enables synchronized capture with no minimum setup/hold timing constraints. |
| Quiescent Current | 6mA per comparator at +5V; enables battery-sensitive or thermally constrained designs. |
Pinout & Package
MAX912CPE is housed in a 16-pin plastic DIP (dual in-line package) with 0.300" body width and through-hole mounting. Pin 1 is marked by a notch or dot; both GND pins (3 and 14) must be connected to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | QA, QB | TTL output (active-high) for Comparator A and B; sinks 10mA, sources 4mA. |
| 2, 15 | QA, QB | Complementary TTL output (active-low); provides differential logic interface. |
| 3, 14 | GND | Logic ground reference; both pins must be tied to PCB ground plane for noise immunity. |
| 4, 13 | LEA, LEB | Latch enable inputs; TTL-high or floating latches outputs; TTL-low enables transparent mode. |
| 5, 12 | N.C. | No internal connection; leave unconnected and unstubbed on PCB. |
| 6 | V− | Negative supply rail; connect to GND (single +5V) or −5V (dual supply); bypass with 0.1µF ceramic. |
| 7, 9 | INA−, INB+ | Inverting input (A), noninverting input (B); differential pair with rail-to-rail common-mode range. |
| 8, 10 | INA+, INB− | Noninverting input (A), inverting input (B); matched input impedance supports balanced signaling. |
| 11 | V+ | Positive supply rail (+5V); powers analog and digital sections; bypass with 0.1µF ceramic + 10µF tantalum. |
Key Features
| Feature | Design Value |
|---|---|
| Stable linear-region operation | Eliminates need for external hysteresis-preserves full input resolution down to DC. |
| No minimum input slew-rate requirement | Valid output guaranteed even for triangle-wave or slowly varying inputs-no signal conditioning needed. |
| Independent latch control per channel | Enables asynchronous sampling of two analog signals with separate timing control (LEA/LEB). |
| Rail-to-rail input voltage range | Accepts inputs 200mV below V− (e.g., −0.2V on single +5V); supports ground-referenced sensor interfaces. |
| Low power consumption | 6mA per comparator at +5V-reduces thermal load and enables multi-channel systems on shared supplies. |
Applications
| Zero-Crossing Detectors | Ethernet Line Receivers |
|---|---|
|
Use Scenario: Detecting polarity transitions in AC mains or audio signals with minimal latency and no false triggering. IC Role / Device Role / Timing Role: Dual comparator monitors differential input pairs; latch function captures crossing instants synchronously. Use Value: 10ns propagation delay and linear-region stability prevent chatter during slow zero crossings-enabling clean edge detection without hysteresis-induced dead zones. |
Use Scenario: Recovering digital data from differential Ethernet PHY signals in legacy 10BASE-T receivers. IC Role / Device Role / Timing Role: High-speed comparator converts twisted-pair differential voltage into TTL logic levels with precise threshold alignment. Use Value: Input common-mode range spanning −0.2V to +3.5V accommodates Ethernet common-mode noise while maintaining 0.8mV offset accuracy for reliable signal recovery. |
| Switching Regulators | High-Speed Sampling Circuits |
|
Use Scenario: Monitoring feedback voltage against reference in PWM controllers for buck/boost topologies. IC Role / Device Role / Timing Role: Comparator A compares error amplifier output to ramp signal; latch holds decision until next clock cycle. Use Value: 6mA supply current per channel minimizes regulator overhead; latch enable allows deterministic sampling aligned to switching frequency. |
Use Scenario: Digitizing analog waveforms in test equipment or data acquisition systems requiring >70MHz effective sampling rate. IC Role / Device Role / Timing Role: Dual comparator acts as window comparator or threshold detector; complementary outputs feed FPGA logic directly. Use Value: Complementary TTL outputs eliminate need for external inverters; 10ns delay supports 100Msps real-time event capture with precise timing margins. |
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, open-collector outputs, no linear-region stability guarantee. | Suitable for low-speed, cost-sensitive comparators where hysteresis is acceptable and timing is non-critical. | Select LM393DR only when speed <100kHz and latch functionality are unnecessary. |
| TLV3501CDR | Faster (4.5ns), rail-to-rail input, CMOS output, but no latch and higher quiescent current (6.5mA vs. 6mA). | Better for ultra-high-speed ADC front-ends or laser pulse detection where latch is not required. | Choose TLV3501CDR when propagation delay <5ns is mandatory and latch control is handled externally. |
Compared with LM393DR and TLV3501CDR, the MAX912CPE uniquely combines 10ns speed, built-in latch per channel, linear-region stability, and TTL-compatible outputs-making it the only option for synchronized, high-resolution dual-channel comparison without external support circuitry.
Availability
MAX912CPE is available at Aetrix Electronics and suitable for switching regulators, zero-crossing detectors, and high-speed sampling circuits requiring stable component supply across industrial temperature ranges (0°C to +70°C).
Supply support for MAX912CPE 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 precision analog, mixed-signal, and high-speed interface ICs for industrial, communications, and computing applications.
The MAX912CPE belongs to Maxim's precision high-speed comparator product line, designed specifically for applications demanding nanosecond-level timing accuracy, latch synchronization, and stable operation without hysteresis-targeting power management and signal acquisition systems.
FAQ
What is the operating temperature range for the MAX912CPE?
The MAX912CPE is rated for 0°C to +70°C ambient operation, as indicated by the "C" suffix in its part number. This commercial-grade temperature range suits indoor industrial controls, test equipment, and consumer electronics where ambient conditions remain within standard room-temperature limits. The MAX912CPE maintains full electrical specifications-including 10ns propagation delay and 0.8mV offset-across this entire range.
Does the MAX912CPE require external hysteresis for stable operation?
No, the MAX912CPE does not require external hysteresis. Its internal design ensures stable output behavior even when inputs reside in the linear region-unlike many high-speed comparators that oscillate near zero differential voltage. Adding hysteresis to the MAX912CPE would degrade resolution unnecessarily, as confirmed in Maxim's application notes. The MAX912CPE achieves this stability inherently, preserving full input resolution for slow-moving or low-slew-rate signals.
Can the MAX912CPE operate from a single +5V supply?
Yes, the MAX912CPE supports single +5V operation: connect V− (Pin 6) to ground, and apply +5V to V+ (Pin 11). In this configuration, the input common-mode range is −0.2V to +3.5V-extending 200mV below ground-enabling direct interfacing with ground-referenced sensors. The MAX912CPE draws 6mA per comparator under these conditions and delivers full TTL-compatible output swing.
What is the purpose of the LEA and LEB pins on the MAX912CPE?
The LEA (Pin 4) and LEB (Pin 13) pins provide independent latch-enable control for Comparator A and B, respectively. When pulled high or left floating, they freeze the corresponding QA/QA or QB/QB outputs at their last valid state; when driven low, the comparators operate transparently-updating outputs in real time with input changes. This enables synchronized sampling of two analog signals without external flip-flops, a key advantage of the MAX912CPE over generic comparators.
How does the MAX912CPE differ from the MAX913 in functionality?
The MAX912CPE integrates two independent comparators with dedicated latch enables (LEA/LEB), complementary TTL outputs per channel (QA/QA, QB/QB), and 16-pin packaging. The MAX913 is a single-comparator variant in 8-pin packages (e.g., MAX913CPA) with one latch enable (LE) and one complementary output pair (Q/Q). While both share identical speed (10ns), offset (0.8mV), and supply specs, only the MAX912CPE supports dual-channel, independently latched comparison-making it essential for applications requiring parallel threshold detection.
MAX912CPE 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
MAX912CPE FAQ
1.How can I place an order for MAX912CPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX912CPE 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 MAX912CPE reliable?
The price and inventory of MAX912CPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX912CPE is usually 5 days.
3.What payment methods are accepted for MAX912CPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX912CPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX912CPE?
MAX912CPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX912CPE 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 MAX912CPE?
For technical support, including MAX912CPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX912CPE requirements.
6.How does Aetrix verify that MAX912CPE is sourced from the original manufacturer or authorized distributors?
All MAX912CPE 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 MAX912CPE meets industry standards.
7.What is the process for return or replacement of MAX912CPE?
All MAX912CPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX912CPE, 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 MAX912CPE part is unused and in its original packaging.
Return procedure for MAX912CPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX912CPE Tags
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LM2903DR
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LM339DR
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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