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Analog Devices Inc./Maxim Integrated MAX907CSA+
- Part No.:
- MAX907CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX907CSA+.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:127
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Product details
Overview
MAX907CSA+ from Maxim Integrated is a dual high-speed ultra-low-power single-supply TTL comparator in 8-pin SO package, delivering 40ns propagation delay with 700µA supply current per comparator, 500µV offset voltage, and rail-to-rail input range from –0.2V to V+–1.5V. It operates from a single +5V supply and is used in battery-powered threshold detection and high-speed sampling circuits.
For engineers reviewing the MAX907CSA+ datasheet, MAX907CSA+ pinout, MAX907CSA+ application, or MAX907CSA+ equivalent, key selection criteria include propagation delay vs. overdrive, internal hysteresis width (±2mV trip points), TTL-compatible push-pull outputs, input short-circuit robustness, and SO-8 thermal derating (5.88mW/°C above +70°C).
Technical Context
The MAX907CSA+ integrates two independent comparators with fixed internal hysteresis (VHYST ≈ 4mV), eliminating external feedback resistors. Its bipolar process enables 40ns propagation delay at 5mV overdrive while maintaining 700µA per comparator quiescent current.
All inputs and outputs are short-circuit protected to either supply rail; the input common-mode range extends 200mV below GND and up to 1.5V below V+, supporting direct interfacing with sensors and logic in single-supply systems without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns typical at 5mV input overdrive - enables reliable 20MHz+ sampling in zero-crossing or A/D front-ends |
| Supply Current per Comparator | 700µA at V+ = 5V - supports multi-comparator operation in sub-1mA battery systems |
| Input Offset Voltage | 0.5mV typical - ensures accurate threshold detection within ±2mV hysteresis window |
| Input Common-Mode Range | –0.2V to V+–1.5V - accepts signals below ground and near V+ without clamping diodes |
| Output Type | TTL-compatible push-pull - drives 74LS loads directly; no pull-up resistor required |
| Power Dissipation per Comparator | 3.5mW typical at V+ = 5V - enables thermally stable placement in dense SO-8 layouts |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded instrumentation and portable equipment |
Pinout & Package
MAX907CSA+ is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012AC compliant, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive supply input | Accepts 4.5V–5.5V single supply; decoupling capacitor must be placed within 2mm |
| 2 - INA− | Inverting input of comparator A | Differential pair base node; biased internally; supports –0.2V to V+–1.5V common-mode |
| 3 - INA+ | Noninverting input of comparator A | Differential pair emitter node; matched to INA− for <0.5mV offset |
| 4 - GND | Circuit ground reference | Return path for both comparators; requires low-inductance plane connection |
| 5 - INB+ | Noninverting input of comparator B | Independent of comparator A; identical electrical characteristics and layout sensitivity |
| 6 - INB− | Inverting input of comparator B | Matched to INB+; enables differential sensing or independent threshold comparison |
| 7 - OUTB | Output of comparator B | TTL-compatible push-pull; sinks 3.2mA / sources 100µA; short-circuit safe to V+ or GND |
| 8 - OUTA | Output of comparator A | Functionally identical to OUTB; no internal cross-coupling; supports asynchronous dual-channel operation |
Key Features
| Feature | Design Value |
|---|---|
| Internal hysteresis | Fixed ~4mV input-referred window (VTRIP+ = +2mV, VTRIP− = −2mV) eliminates external resistor network and oscillation on slow edges |
| Rail-to-rail input capability | Operates with inputs as low as –0.2V (200mV below GND) and as high as V+–1.5V - interfaces directly with transducer outputs and DACs |
| TTL-compatible outputs | Push-pull structure delivers VOH ≥ 2.8V at 100µA and VOL ≤ 0.525V at 3.2mA - drives 74LS/ALS logic without external components |
| Short-circuit protection | Continuous short to V+ or GND on any input or output causes no damage - simplifies ESD-safe board handling and test fixture design |
| Low power at speed | 3.5mW per comparator at 40ns delay - achieves >25MHz effective switching rate per channel within 1.4mW total IC dissipation |
Applications
| Battery-Powered Threshold Detector | High-Speed A/D Converter Front-End |
|---|---|
Use Scenario: Detecting low-voltage battery depletion (e.g., 3.3V Li-ion cutoff at 3.0V) in handheld medical devices with 10-year shelf life. IC Role / Device Role / Timing Role: Dual comparator monitors cell voltage against precision reference; one channel triggers alert, second validates hysteresis hold-off. Use Value: 700µA total quiescent current extends battery life; internal hysteresis prevents chatter during gradual voltage decay near threshold. |
Use Scenario: Flash ADC input conditioning where analog signal must be compared against multiple reference levels within 50ns. IC Role / Device Role / Timing Role: Two parallel comparators sample input at staggered timing to resolve 2-bit flash conversion; 40ns delay ensures <25MHz sampling fidelity. Use Value: Matched propagation delay skew <2ns between channels guarantees monotonic code transitions; TTL outputs interface directly with latch logic. |
| Line Receiver for RS-232 Level Translation | Zero-Crossing Detector in AC Power Monitoring |
Use Scenario: Converting legacy RS-232 signals (±3V to ±15V) to 0V/5V logic for microcontroller UART input in industrial gateways. IC Role / Device Role / Timing Role: One comparator channel compares received signal to 0V reference; internal hysteresis rejects noise on long cables. Use Value: Input range down to –0.2V allows direct connection to RS-232 drivers without negative supply or level-shifter ICs. |
Use Scenario: Detecting AC mains zero crossings for phase-controlled dimming in smart lighting controllers operating from 5V rail. IC Role / Device Role / Timing Role: Comparator compares rectified sine wave to 0V reference; output toggles precisely at polarity reversal. Use Value: 500µV offset and 4mV hysteresis ensure jitter <1.5µs at 50Hz; TTL output drives optocoupler LED directly with no series resistor needed. |
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 (300ns typ), higher supply current (1mA/comparator), no internal hysteresis, open-collector outputs requiring pull-up | Suitable only for low-speed (<100kHz) threshold detection; cannot replace MAX907CSA+ in sampling or line-receiver roles | Select only if cost is primary constraint and speed/power/hysteresis are noncritical |
| TLV3501CDR | Faster (4.5ns), rail-to-rail I/O, CMOS input (pA bias), but requires external hysteresis and 2.7–5.5V supply; no –0.2V input capability | Better for high-precision, low-noise sensor interfaces; unsuitable for direct RS-232 or sub-ground signal detection | Choose when nanosecond timing or ultra-low input bias is required, and system can accommodate external hysteresis design |
Compared with LM393DR and TLV3501CDR, the MAX907CSA+ uniquely combines TTL compatibility, internal hysteresis, sub-ground input operation, and 40ns speed at micropower - making it irreplaceable in battery-powered high-speed thresholding where layout simplicity and supply headroom are constrained.
Availability
MAX907CSA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, high-speed data acquisition front-ends, and industrial line-receiver designs requiring stable component supply across extended production lifecycles.
Supply support for MAX907CSA+ 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 precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX907CSA+ belongs to Maxim's high-speed comparator product line, engineered specifically for single-supply systems demanding low power, fast response, and robust input tolerance - targeting portable test equipment and real-time signal conditioning.
FAQ
What is the maximum operating supply voltage for MAX907CSA+?
The MAX907CSA+ has an absolute maximum positive supply voltage of +6V referenced to GND. However, its specified operating range is 4.5V to 5.5V. Operation outside this range may cause parametric shift or reliability degradation. The MAX907CSA+ does not support negative supply rails - unlike the MAX909, it lacks a V− pin and is strictly single-supply. Always use 0.1µF ceramic decoupling at the V+ pin.
Does MAX907CSA+ include internal hysteresis, and what is its value?
Yes, the MAX907CSA+ incorporates fixed internal hysteresis. The input-referred hysteresis width is approximately 4mV, defined by VTRIP+ = +2mV and VTRIP− = −2mV (at VCM = 0V). This eliminates need for external feedback resistors and ensures clean output transitions even with slowly varying inputs. The hysteresis is inherent to the comparator core and cannot be disabled or adjusted.
Can MAX907CSA+ inputs be driven below ground, and how low?
Yes, the MAX907CSA+ inputs tolerate voltages down to –0.2V (200mV below GND) under normal operation. This is explicitly specified in the common-mode input voltage range (–0.2V to V+–1.5V). Driving below –0.2V risks exceeding absolute maximum ratings and may invert output polarity. For deeper sub-ground operation, external Schottky clamping (as shown in Figure 3 of the datasheet) is required.
What is the output structure of MAX907CSA+, and can it drive TTL loads directly?
The MAX907CSA+ features push-pull (totem-pole) TTL-compatible outputs. Each output delivers VOH ≥ 2.8V at 100µA source current and VOL ≤ 0.525V at 3.2mA sink current - fully compliant with standard TTL logic thresholds. No external pull-up resistor is needed, and it can directly drive 74LS, 74ALS, and most microcontroller GPIO inputs without level-shifting circuitry.
Is MAX907CSA+ still recommended for new designs, and what is its lifecycle status?
No - MAX907CSA+ is Not Recommended for New Designs (NRND), as stated in Maxim's official documentation. The underlying wafer process is obsolete, and Maxim does not guarantee long-term availability. While functional units remain available through authorized distributors and Aetrix Electronics, designers should evaluate drop-in alternatives like the MAX961 or industry equivalents for new projects requiring assured supply continuity.
MAX907CSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- TTL
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 11V
- :
- 2mV @ 5V
- Voltage - Input Offset (Max):
- 0.3µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 1mA
- Current - Quiescent (Max):
- 86.02dB CMRR, 86.02dB PSRR
- CMRR, PSRR (Typ):
- 50ns
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX907CSA+ FAQ
1.How can I place an order for MAX907CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX907CSA+ 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 MAX907CSA+ reliable?
The price and inventory of MAX907CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX907CSA+ is usually 5 days.
3.What payment methods are accepted for MAX907CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX907CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX907CSA+?
MAX907CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX907CSA+ 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 MAX907CSA+?
For technical support, including MAX907CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX907CSA+ requirements.
6.How does Aetrix verify that MAX907CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX907CSA+ 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 MAX907CSA+ meets industry standards.
7.What is the process for return or replacement of MAX907CSA+?
All MAX907CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX907CSA+, 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 MAX907CSA+ part is unused and in its original packaging.
Return procedure for MAX907CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX907CSA+ Tags
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LM2903DR
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LM393DT
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LM393DR
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LM239DR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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