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Diodes Incorporated AS339AMTR-E1
- Part No.:
- AS339AMTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AS339AMTR-E1.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,250
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Product details
Overview
AS339AMTR-E1 from Diodes Incorporated is a quad precision voltage comparator IC with 2.0mV typical input offset voltage, 0.9mA supply current, and open-collector outputs. It operates from single supplies (2.0V–36V) or dual supplies (±1.0V–±18V), supports ground-sensing inputs, and is used in battery chargers, PC motherboards, and DC-DC modules.
For engineers reviewing the AS339AMTR-E1 datasheet, AS339AMTR-E1 pinout, AS339AMTR-E1 application, or AS339AMTR-E1 equivalent, key selection criteria include input offset voltage tightness (≤3mV max), low bias current (25nA typ), wide common-mode range (0V to VCC−1.5V), and SO-14 package compatibility with legacy 339-series designs.
Technical Context
The AS339AMTR-E1 implements four independent high-gain comparators using PNP input stage architecture, enabling rail-to-rail input common-mode operation down to ground. Its differential input voltage range equals full supply voltage (up to ±18V or 36V), and output stage uses open-collector NPN transistors for flexible pull-up configuration.
Designed as a drop-in enhancement of industry-standard LM339, the AS339A variant enforces tighter input offset voltage specification (2.0mV typ / 5mV max vs. 7mV max for AS339) without altering pinout or supply requirements-making it suitable for precision threshold detection where offset drift impacts system accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 2.0mV typical; ensures ≤5mV worst-case threshold error at room temperature, critical for accurate battery voltage monitoring. |
| Supply Current | 0.9mA typical at 5V; enables low-power operation in always-on circuits like power-good detection on embedded motherboards. |
| Input Bias Current | 25nA typical; minimizes loading on high-impedance reference dividers (e.g., 1MΩ networks) in precision sensing applications. |
| Common-Mode Range | 0V to VCC−1.5V; allows direct ground-referenced input sensing without level-shifting circuitry. |
| Output Type | Open-collector; supports wired-OR logic, mixed-voltage interfacing (e.g., 3.3V logic driving 5V bus), and external pull-up optimization. |
| Response Time | 200ns typical (5mV overdrive); supports fast edge detection in switching power supply feedback loops. |
| Saturation Voltage | 200mV at 4mA sink; reduces power loss and heat generation when driving LEDs or MOSFET gates directly. |
Pinout & Package
AS339AMTR-E1 is packaged in a 14-pin SOIC (SO-14) surface-mount package with standard 1.27mm pitch, 8.75mm × 3.9mm body, and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1− | Inverting input of Comparator 1; accepts signals down to ground with no level shift required. |
| 2 | IN1+ | Non-inverting input of Comparator 1; forms precision threshold detector with IN1−. |
| 3 | IN2− | Inverting input of Comparator 2; shares same electrical specs as Pin 1 for matched channel performance. |
| 4 | IN2+ | Non-inverting input of Comparator 2; enables dual independent comparisons per device. |
| 5 | VCC | Positive supply rail; supports 2.0V–36V single or ±1.0V–±18V dual supply operation. |
| 6 | OUT1 | Open-collector output of Comparator 1; requires external pull-up for logic-high assertion. |
| 7 | OUT2 | Open-collector output of Comparator 2; electrically isolated from OUT1 for independent load control. |
| 8 | GND | Ground reference; completes return path for all comparators and defines 0V reference for inputs/outputs. |
| 9 | IN3+ | Non-inverting input of Comparator 3; enables third independent comparison function. |
| 10 | IN3− | Inverting input of Comparator 3; matches IN1−/IN2− electrical behavior for consistent design reuse. |
| 11 | IN4+ | Non-inverting input of Comparator 4; provides fourth threshold detection channel. |
| 12 | IN4− | Inverting input of Comparator 4; completes quad-channel capability with matched offset/bias specs. |
| 13 | OUT3 | Open-collector output of Comparator 3; supports daisy-chained or individually pulled-up configurations. |
| 14 | OUT4 | Open-collector output of Comparator 4; enables full quad-output flexibility without internal contention. |
Key Features
| Feature | Design Value |
|---|---|
| Low Input Offset Voltage | 2.0mV typical (AS339A grade) enables sub-10mV total error in battery voltage window detectors. |
| Ground-Sensing Inputs | Input common-mode range includes 0V, eliminating need for negative supply or level-shifting in single-supply systems. |
| Wide Supply Range | Operates from 2.0V to 36V single supply-supports both low-voltage IoT sensors and industrial 24V control rails. |
| Open-Collector Outputs | Four independent open-drain outputs allow flexible interface to 1.8V, 3.3V, or 5V logic families via external pull-ups. |
| Low Power Consumption | 0.9mA supply current at 5V enables integration into energy-sensitive applications like portable chargers. |
Applications
| Battery Charger Monitoring | PC Motherboard Power Sequencing |
|---|---|
Use Scenario: Detecting full-charge condition and overvoltage thresholds in lithium-ion battery charging circuits. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous monitoring of cell voltage, thermistor temperature, charge current, and AC presence. Use Value: Tight 2.0mV offset ensures ±5mV threshold accuracy, preventing premature termination or overcharge under varying temperature conditions. | Use Scenario: Validating correct power rail sequencing (e.g., +12V before +5V before +3.3V) during motherboard boot. IC Role / Device Role / Timing Role: Each comparator monitors one rail against a precision reference to generate individual "power good" signals. Use Value: Open-collector outputs enable wired-OR combination into a single system reset signal, simplifying timing-critical coordination. |
| DC-DC Module Feedback | Switching Power Supply Protection |
Use Scenario: Providing precise undervoltage lockout (UVLO) and overvoltage protection (OVP) in isolated DC-DC converters. IC Role / Device Role / Timing Role: Two comparators monitor primary-side feedback voltage to trigger shutdown before regulation failure. Use Value: 200ns response time ensures OVP activation within 1 switching cycle (<1µs at 1MHz), protecting downstream loads from transient overvoltage. | Use Scenario: Detecting overcurrent, overtemperature, and short-circuit faults in offline AC-DC adapters. IC Role / Device Role / Timing Role: Comparators interface with current-sense resistors and thermal sensors to assert fault latches. Use Value: Low 25nA input bias current avoids measurement error in high-value sense resistor networks (e.g., 10kΩ shunts), preserving accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Higher 7mV max offset voltage; 1.6mA supply current; same SO-14 pinout. | Less suitable for precision battery cutoff; acceptable for general-purpose logic-level detection. | Select when cost sensitivity outweighs offset accuracy requirements and legacy LM339 footprint is mandatory. |
| TL331IDBVR | Single-channel; 2.5mV max offset; 0.4mA supply current; SOT-23-5 package. | Requires four devices for quad functionality; smaller footprint but higher BOM count and routing complexity. | Select for space-constrained designs where board area is prioritized over component count and inter-channel matching. |
Compared with LM339DR and TL331IDBVR, AS339AMTR-E1 delivers superior offset voltage performance in a proven quad SO-14 package-enabling single-component replacement of legacy designs while improving accuracy in battery management and power sequencing without layout changes.
Availability
AS339AMTR-E1 is available at Aetrix Electronics and suitable for battery charger monitoring, PC motherboard power sequencing, and DC-DC module feedback requiring stable component supply across automotive, industrial, and computing end markets.
Supply support for AS339AMTR-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The AS339/339A series belongs to Diodes' precision analog comparator product line, engineered specifically for high-accuracy voltage threshold detection in single-supply systems where ground-referenced sensing and low quiescent current are essential.
FAQ
What is the maximum supply voltage rating for AS339AMTR-E1?
The absolute maximum supply voltage is 40V, but recommended operating range is 2.0V to 36V for single supply or ±1.0V to ±18V for dual supply. Exceeding 36V risks violating recommended conditions even if below absolute maximum, potentially degrading long-term reliability and offset stability.
Does AS339AMTR-E1 support true rail-to-rail input operation?
No-it supports input common-mode voltage down to ground (0V) and up to VCC−1.5V, not full rail-to-rail. However, either input can tolerate voltages up to +36V regardless of VCC, enabling overvoltage-tolerant sensing in unregulated inputs without clamping diodes.
Can AS339AMTR-E1 outputs drive TTL or CMOS logic directly?
Yes-its open-collector outputs can interface with TTL or CMOS by selecting appropriate external pull-up resistors. For 5V TTL, a 10kΩ pull-up yields ~0.2V saturation voltage at 4mA sink; for 3.3V CMOS, a 4.7kΩ pull-up ensures valid high-level recognition while staying within 16mA absolute max sink current.
Is AS339AMTR-E1 pin-compatible with LM339?
Yes-AS339AMTR-E1 uses identical SO-14 pinout and electrical interface as LM339, including open-collector outputs, ground-sensing inputs, and supply voltage ranges. The AS339A grade improves offset voltage spec without requiring PCB redesign or firmware changes.
AS339AMTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 3mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
AS339AMTR-E1 FAQ
1.How can I place an order for AS339AMTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS339AMTR-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 AS339AMTR-E1 reliable?
The price and inventory of AS339AMTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS339AMTR-E1 is usually 5 days.
3.What payment methods are accepted for AS339AMTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS339AMTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS339AMTR-E1?
AS339AMTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS339AMTR-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 AS339AMTR-E1?
For technical support, including AS339AMTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS339AMTR-E1 requirements.
6.How does Aetrix verify that AS339AMTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS339AMTR-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 AS339AMTR-E1 meets industry standards.
7.What is the process for return or replacement of AS339AMTR-E1?
All AS339AMTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS339AMTR-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 AS339AMTR-E1 part is unused and in its original packaging.
Return procedure for AS339AMTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS339AMTR-E1 Tags
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