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Analog Devices Inc./Maxim Integrated MAX912CSE+
- Part No.:
- MAX912CSE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX912CSE+.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,860
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Product details
Overview
The MAX912CSE+ 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 MAX912CSE+ datasheet, MAX912CSE+ pinout, MAX912CSE+ application, or MAX912CSE+ equivalent, this page delivers verified package mapping (16-pin narrow SO), latch-enabled dual-channel timing behavior, input voltage range extending below negative rail, and real-world design implications for zero-crossing detection and pulse-width discrimination.
Technical Context
The MAX912CSE+ implements a fully differential bipolar input stage with trimmed offset voltage (0.8mV typ) and no built-in hysteresis, enabling high-resolution comparison of slow-moving signals without oscillation in the linear region. Its latch-enable architecture (LEA/LEB pins) provides transparent or latched output control per channel.
It supports dual ±5V or single +5V supply configurations, with independent analog (V−) and digital/analog (V+) power domains. Input common-mode range spans −5.2V to +3.5V (±5V supplies), and outputs drive TTL-compatible loads with VOH ≥ 2.4V (IOUT = 10mA) and VOL ≤ 0.4V (ISINK = 10mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 10ns typical (ΔVIN = 100mV, VOD = 20mV); enables ≤85MHz signal sampling with 20mV overdrive. |
| Supply Voltage Range | +4.5V to +5.5V (single) or ±4.5V to ±5.5V (dual); supports industrial-grade 5V rails with margin. |
| Input Offset Voltage | 0.8mV typical at +25°C; ensures <1mV DC error floor for precision threshold detection. |
| Input Common-Mode Range | −5.2V to +3.5V (±5V supplies); allows direct interfacing to bipolar sensor outputs or op-amp stages. |
| Supply Current per Comparator | 6mA typical at +5V; enables dual-channel high-speed comparison with <12mA total analog quiescent draw. |
| Output Type | Complementary TTL (QA/QA, QB/QB); drives standard logic loads without level-shifting or pull-ups. |
| Latch Enable Logic | TTL-high or floating = latched; TTL-low = transparent; eliminates need for external edge-triggered flip-flops. |
Pinout & Package
MAX912CSE+ is housed in a 16-pin narrow SO (SOIC-N) package, 3.9mm × 9.9mm body, 1.27mm pitch, RoHS-compliant, with exposed pad not present. Pin 1 marked via bevelled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | QA / QB | True TTL output for Comparator A/B; sinks 10mA, sources 4mA; logic-high ≥2.4V. |
| 2, 15 | QA / QB | Complementary TTL output for Comparator A/B; inverted relative to true output. |
| 3, 14 | GND | Logic ground reference; both pins must be connected to system ground for noise immunity. |
| 4, 13 | LEA / LEB | Latch enable for Comparator A/B; high/floating = hold last state; low = track input differentially. |
| 5, 12 | N.C. | No internal connection; leave unconnected; no routing or thermal tie required. |
| 6 | V− | Negative supply rail; connect to −5V (dual) or GND (single +5V); bypass with 0.1µF ceramic. |
| 7, 9 | INA− / INB+ | Inverting input for A, noninverting for B; high-impedance (IB ≤ 8µA), rail-to-rail capable. |
| 8, 10 | INA+ / INB− | Noninverting input for A, inverting for B; same electrical specs as paired inputs. |
| 11 | V+ | Positive supply rail; +5V nominal; powers analog core and TTL outputs; bypass critical. |
Key Features
| Feature | Design Value |
|---|---|
| Stable linear-region operation | Eliminates need for external hysteresis, preserving full resolution down to DC and enabling accurate zero-crossing detection. |
| Independent latch controls (LEA/LEB) | Allows asynchronous sampling of two independent analog channels without shared timing constraints or added logic. |
| Input range extends below V− | Supports direct interface to sensors or amplifiers operating below ground (e.g., −2V transducer outputs). |
| No minimum input slew-rate requirement | Valid output guaranteed even for µV/s input ramps-critical for low-frequency V/F conversion and slow-motion triggers. |
| Low 6mA +5V supply current per comparator | Enables dual-channel high-speed comparison in power-constrained systems (e.g., portable test equipment). |
Applications
| Zero-Crossing Detectors | Ethernet Line Receivers |
|---|---|
Use Scenario: Detecting polarity reversal of AC line voltage or transformer-coupled signals in energy metering or motor control. IC Role / Device Role / Timing Role: Dual comparator monitors differential input across zero; QA/QB provide synchronized rising/falling edge flags. Use Value: 10ns delay and linear-region stability ensure jitter-free zero-cross timestamps without false triggers from noise or slow transitions. |
Use Scenario: Recovering differential data from twisted-pair Ethernet PHY outputs (10BASE-T/100BASE-TX). IC Role / Device Role / Timing Role: High-speed comparator converts small-swing differential signals (±1V) into clean TTL logic for MAC interface. Use Value: −5.2V to +3.5V input range accommodates common-mode offsets up to ±2.5V; 10ns delay meets 100Mbps timing budgets. |
| Switching Regulators | High-Speed Sampling Circuits |
Use Scenario: Threshold detection in peak-current-mode or voltage-mode DC-DC controllers for buck/boost topologies. IC Role / Device Role / Timing Role: Comparator compares sensed current/voltage against reference; latched output synchronizes PWM generation. Use Value: Latch-enable pins allow precise alignment with clock edges; 6mA supply current minimizes controller-side loading. |
Use Scenario: Window-comparing analog sensor outputs (e.g., ADC reference monitoring or fault detection in data acquisition). IC Role / Device Role / Timing Role: Dual comparator forms high-speed window detector; QA and QB define upper/lower bounds with independent latching. Use Value: Complementary TTL outputs drive FPGA inputs directly; 500ps channel-to-channel skew ensures simultaneous boundary evaluation. |
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, wider supply range (2–36V), higher offset (2mV). | Suitable for low-speed, cost-sensitive comparators where TTL drive and latching are unnecessary. | Choose LM393DR only when speed <100kHz and latch function are not required; MAX912CSE+ offers 130× faster response and integrated latching. |
| LT1719CS8#PBF | Faster (4.5ns), rail-to-rail inputs, CMOS outputs, no latch, higher supply current (4.5mA per comparator), ±5V compatible. | Better for ultra-high-speed (>100MHz) sampling but lacks independent latch control per channel. | Choose LT1719CS8#PBF when sub-5ns delay is mandatory and latch functionality is handled externally; MAX912CSE+ integrates latch with lower power and proven linear stability. |
Compared with LM393DR and LT1719CS8#PBF, the MAX912CSE+ uniquely combines 10ns speed, dual independent latches, rail-exceeding inputs, and linear-region stability-making it the only option that eliminates hysteresis while supporting synchronous dual-channel sampling in ±5V systems.
Availability
MAX912CSE+ is available at Aetrix Electronics and suitable for switching regulators, zero-crossing detectors, and high-speed sampling circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX912CSE+ 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) designs precision analog, mixed-signal, and high-speed ICs for industrial, communications, and computing applications.
The MAX912CSE+ belongs to Maxim's high-speed comparator product line, engineered specifically for applications demanding nanosecond timing accuracy, latch synchronization, and stable operation without hysteresis-targeting power management, data acquisition, and communications infrastructure.
FAQ
What supply voltages does the MAX912CSE+ support?
The MAX912CSE+ operates from a single +5V supply (V− = GND) or dual ±5V supplies (V− = −5V, V+ = +5V). It functions across +4.5V to +5.5V (single) or ±4.5V to ±5.5V (dual), with input common-mode range extending to −5.2V on V−. This flexibility allows use in legacy ±5V systems or modern single-rail designs without level-shifting. The MAX912CSE+ maintains specified performance-including 10ns propagation delay and 0.8mV offset-across this full range.
Does the MAX912CSE+ require external hysteresis for stable operation?
No, the MAX912CSE+ does not require external hysteresis. Its proprietary design ensures stable output behavior even when inputs reside in the linear region (near zero differential voltage), eliminating oscillation common to other high-speed comparators. Adding hysteresis degrades resolution and contradicts the MAX912CSE+'s design intent. The MAX912CSE+ achieves this via a fully differential bipolar input stage with no built-in hysteresis and trimmed offset, enabling accurate DC and low-frequency comparisons.
How does the latch function work on the MAX912CSE+?
The MAX912CSE+ features independent latch-enable inputs LEA (Pin 4) and LEB (Pin 13). When either pin is held high (≥2.0V) or left floating, the corresponding comparator's outputs (QA/QA or QB/QB) hold their last valid state. When pulled low (≤0.8V), the latch becomes transparent and outputs respond immediately to input differential voltage. This allows asynchronous sampling of two analog signals with separate timing control-no external flip-flops needed. The MAX912CSE+ guarantees latch setup time (tSU) of 2ns and hold time (tH) of 5ns.
What is the input common-mode voltage range for the MAX912CSE+?
The MAX912CSE+ supports an input common-mode voltage range of −5.2V to +3.5V when powered from ±5V supplies, and −0.2V to +3.5V with a single +5V supply (V− = GND). This rail-exceeding capability allows direct connection to sensors, op-amps, or transformers whose outputs swing below ground or near V+. The MAX912CSE+ maintains full specifications-including 10ns propagation delay and 0.8mV offset-across this entire range, verified over temperature and supply variations.
Can the MAX912CSE+ replace the MAX912CPE or MAX912ESE?
Yes-the MAX912CSE+ is functionally identical to the MAX912CPE (16-pin DIP) and MAX912ESE (16-pin narrow SO, extended −40°C to +85°C), differing only in package and temperature grade. All share identical pinout, electrical specs, and latch behavior. The MAX912CSE+ is rated for 0°C to +70°C operation in narrow SO packaging. For industrial environments requiring −40°C operation, MAX912ESE is the direct alternative; for through-hole prototyping, MAX912CPE applies. No PCB redesign is needed between these variants.
MAX912CSE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Surface Mount
- :
- 16-SOIC
MAX912CSE+ FAQ
1.How can I place an order for MAX912CSE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX912CSE+ 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 MAX912CSE+ reliable?
The price and inventory of MAX912CSE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX912CSE+ is usually 5 days.
3.What payment methods are accepted for MAX912CSE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX912CSE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX912CSE+?
MAX912CSE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX912CSE+ 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 MAX912CSE+?
For technical support, including MAX912CSE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX912CSE+ requirements.
6.How does Aetrix verify that MAX912CSE+ is sourced from the original manufacturer or authorized distributors?
All MAX912CSE+ 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 MAX912CSE+ meets industry standards.
7.What is the process for return or replacement of MAX912CSE+?
All MAX912CSE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX912CSE+, 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 MAX912CSE+ part is unused and in its original packaging.
Return procedure for MAX912CSE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX912CSE+ Tags
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