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Diodes Incorporated AS393MTR-E1
- Part No.:
- AS393MTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AS393MTR-E1.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,760
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Product details
Overview
AS393MTR-E1 from Diodes Incorporated is a low-power, low-offset-voltage dual comparator IC with 1.0mV typical input offset voltage, 0.6mA supply current, and open-collector outputs. It operates from single supplies (2V–36V) or dual supplies (±1.0V–±18V), supports rail-to-rail input common-mode range including ground, and is used in battery chargers, switching power supplies, and PC motherboards.
For engineers reviewing the AS393MTR-E1 datasheet, AS393MTR-E1 pinout, AS393MTR-E1 application, or AS393MTR-E1 equivalent, key selection criteria include input offset voltage tolerance, supply voltage flexibility, open-collector output drive capability, and SO-8 package compatibility with legacy LM393 footprints.
Technical Context
The AS393MTR-E1 implements two independent high-gain comparators with PNP input stages enabling input common-mode voltage down to ground and differential input range equal to the full supply voltage. Its architecture supports stable operation across wide temperature (−40°C to +85°C) and supply ranges without performance degradation.
Input bias current is 25nA (typ), offset current ±5.0nA (typ), and output saturation voltage is 200mV at 4mA sink load - characteristics optimized for precision threshold detection in low-power industrial and computing systems where reference stability and noise immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1.0mV typical - enables accurate 10mV-level threshold detection without trimming |
| Supply Voltage Range | 2V–36V single supply - supports direct integration into 3.3V, 5V, 12V, and 24V systems |
| Supply Current | 0.6mA typical - allows use in always-on monitoring circuits with minimal quiescent power impact |
| Input Bias Current | 25nA typical - minimizes error when driving high-impedance reference dividers or sensor bridges |
| Output Type | Open-collector - permits wired-OR logic, level translation, and flexible pull-up configuration |
| Common-Mode Input Range | 0V to VCC−1.5V - accepts ground-referenced inputs while operating from positive-only rails |
| Response Time | 200ns typical for 5mV overdrive - suitable for fast transient detection in SMPS feedback loops |
Pinout & Package
AS393MTR-E1 is housed in a RoHS-compliant, lead-free SO-8 package (JEDEC MS-012AC) with standard 1.27mm pitch, 5.0mm × 6.2mm body, and matte tin-plated leads. Thermal resistance is 108°C/W (junction-to-ambient) and 9°C/W (junction-to-case).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Open-collector output of comparator 1 - requires external pull-up for logic-high assertion |
| 2 | Inverting Input 1 | Negative input of comparator 1 - accepts signals down to ground with no phase inversion |
| 3 | Non-inverting Input 1 | Positive input of comparator 1 - supports rail-to-rail common-mode range up to VCC−1.5V |
| 4 | GND | Analog ground reference - shared return path for both comparators and internal bias circuitry |
| 5 | Non-inverting Input 2 | Positive input of comparator 2 - electrically isolated from comparator 1 inputs |
| 6 | Inverting Input 2 | Negative input of comparator 2 - supports same common-mode and overvoltage robustness as pin 2 |
| 7 | Output 2 | Open-collector output of comparator 2 - independently configurable with separate pull-up |
| 8 | VCC | Positive supply rail - powers both comparators; current draw independent of voltage magnitude |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Functional from 2V to 36V - eliminates need for split supplies in portable and industrial equipment |
| Input offset voltage | 1.0mV typical (AS393 variant) - reduces calibration overhead in precision voltage window detectors |
| Low input bias current | 25nA typical - preserves accuracy in high-Z resistor networks used for battery voltage monitoring |
| Open-collector outputs | Supports 30V max output swing and wired-OR bus configurations - simplifies interface to microcontrollers and logic families |
| Ground-sensing input stage | Input common-mode includes 0V - enables direct sensing of battery or signal levels referenced to system ground |
Applications
| Battery Charger Monitoring | Switching Power Supply Feedback |
|---|---|
|
Use Scenario: Detecting end-of-charge voltage thresholds and overvoltage conditions in Li-ion charger circuits. IC Role / Device Role / Timing Role: Dual comparator performs simultaneous high/low voltage window comparison on battery cell voltage. Use Value: 1.0mV offset ensures ±5mV detection accuracy; open-collector outputs interface directly to charge controller enable/disable pins. |
Use Scenario: Providing overvoltage protection and undervoltage lockout in DC-DC converter control loops. IC Role / Device Role / Timing Role: Comparator 1 monitors output voltage against reference; comparator 2 validates input rail presence. Use Value: 200ns response time enables fast fault shutdown; 36V supply rating supports wide-input industrial SMPS designs. |
| PC Motherboard Power Sequencing | Cordless Telephone Battery Management |
|
Use Scenario: Validating correct sequencing and presence of multiple supply rails (e.g., +3.3V, +5V, +12V) during system boot. IC Role / Device Role / Timing Role: Each comparator independently verifies one rail against its threshold; outputs feed FPGA or CPLD power-good logic. Use Value: SO-8 footprint matches industry-standard layout practices; low 0.6mA supply current avoids loading auxiliary bias rails. |
Use Scenario: Monitoring NiMH battery pack voltage during charging and discharge cycles in cordless handsets. IC Role / Device Role / Timing Role: One comparator triggers charge termination at peak voltage; second detects deep-discharge cutoff. Use Value: Input common-mode range including ground allows direct connection to battery terminals without level-shifting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher 2mV typical offset voltage; 1.2mA supply current; identical SO-8 pinout | Less precise threshold detection; higher quiescent power in battery-critical systems | Select when cost sensitivity outweighs offset and power requirements |
| AS393AMTR-E1 | Stricter 1.0mV max offset (vs. 1.0mV typ for AS393); otherwise identical electrical specs and packaging | Required for designs needing guaranteed ≤3.0mV offset across temperature and process variation | Select when production testing must guarantee worst-case offset compliance |
Compared with LM393DR, AS393MTR-E1 delivers tighter offset and lower supply current in the same footprint; compared with AS393AMTR-E1, it offers lower-cost qualification for applications where typical (not guaranteed max) offset suffices.
Availability
AS393MTR-E1 is available at Aetrix Electronics and suitable for battery chargers, switching power supplies, and PC motherboards requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for AS393MTR-E1 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.
The AS393/393A series belongs to Diodes' precision analog comparator product line, designed specifically for low-power, wide-supply-voltage applications where ground-sensing capability and open-collector interoperability are essential.
FAQ
Is AS393MTR-E1 pin-compatible with LM393?
Yes, AS393MTR-E1 uses the standard SO-8 package with identical pinout to LM393: Output 1, In−1, In+1, GND, In+2, In−2, Output 2, VCC. No PCB redesign is needed for drop-in replacement, though design validation is recommended due to differences in offset voltage and supply current.
Can AS393MTR-E1 operate from a 3.3V supply?
Yes, AS393MTR-E1 is fully specified from 2V to 36V single supply. At 3.3V, it maintains 1.0mV typical offset voltage, 25nA input bias current, and functional open-collector outputs with 200mV saturation voltage at 4mA - making it suitable for modern low-voltage embedded systems.
What is the maximum input voltage allowed at the comparator inputs?
The absolute maximum differential input voltage is ±40V, and individual input voltages may range from −0.3V to +40V regardless of supply voltage. However, the recommended common-mode range is 0V to VCC−1.5V for linear operation; inputs exceeding this may cause phase reversal but will not damage the device.
Does AS393MTR-E1 support dual-supply operation?
Yes, AS393MTR-E1 supports dual supplies from ±1.0V to ±18V. The device draws only 0.6mA total supply current, independent of supply magnitude, and maintains full functionality with inputs referenced to the negative rail - enabling use in traditional op-amp-style comparator configurations.
AS393MTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 1mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
AS393MTR-E1 FAQ
1.How can I place an order for AS393MTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS393MTR-E1 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 AS393MTR-E1 reliable?
The price and inventory of AS393MTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS393MTR-E1 is usually 5 days.
3.What payment methods are accepted for AS393MTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS393MTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS393MTR-E1?
AS393MTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS393MTR-E1 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 AS393MTR-E1?
For technical support, including AS393MTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS393MTR-E1 requirements.
6.How does Aetrix verify that AS393MTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS393MTR-E1 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 AS393MTR-E1 meets industry standards.
7.What is the process for return or replacement of AS393MTR-E1?
All AS393MTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS393MTR-E1, 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 AS393MTR-E1 part is unused and in its original packaging.
Return procedure for AS393MTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS393MTR-E1 Tags
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