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Diodes Incorporated AS393GTR-E1
- Part No.:
- AS393GTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AS393GTR-E1.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,498
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Product details
Overview
AS393GTR-E1 from Diodes Incorporated is a low-power, low-offset-voltage dual comparator IC with 1.0 mV typical input offset voltage, 0.6 mA supply current, and open-collector outputs. It operates from single supplies (2 V to 36 V) or split supplies (±1.0 V to ±18 V), supports rail-to-rail input common-mode range including ground, and is used in battery chargers, DC-DC modules, and PC motherboards.
For engineers reviewing the AS393GTR-E1 datasheet, AS393GTR-E1 pinout, AS393GTR-E1 application, or AS393GTR-E1 equivalent, this page delivers verified electrical parameters, SO-8/TSSOP-8 package mapping, functional role in voltage monitoring and threshold detection circuits, and validated alternative options for precision dual-comparator designs.
Technical Context
The AS393GTR-E1 integrates two independent high-gain comparators with PNP input stages enabling input common-mode voltage down to ground and up to VCC−1.5 V. Its differential input voltage range equals the full supply voltage (up to ±36 V), and output stage uses open-collector NPN transistors capable of sinking 16 mA at 1.5 V saturation.
Designed as a drop-in replacement for industry-standard LM393, it maintains compatibility while offering tighter offset voltage specs (AS393A variant ≤3.0 mV max) and lower input bias current (25 nA typ). Thermal resistance is 179 °C/W (junction-to-ambient, TSSOP-8), supporting operation from −40 °C to +85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 2 V to 36 V; Dual: ±1.0 V to ±18 V - enables direct integration into 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting. |
| Input Offset Voltage | 1.0 mV (typ), 5.0 mV (max, AS393) - ensures accurate threshold detection below 10 mV differential signals in battery voltage monitoring. |
| Supply Current | 0.6 mA (typ) at 5 V - supports ultra-low-quiescent-current designs in always-on power management circuits. |
| Input Bias Current | 25 nA (typ) - minimizes error in high-impedance sensor interface applications such as thermistor or photodiode signal conditioning. |
| Output Sink Current | 16 mA (min) at VO = 1.5 V - drives standard logic inputs, LEDs, or small relays directly without external buffer transistors. |
| Response Time | 200 ns (typ, 5 mV overdrive) - suitable for fast-switching feedback control in switching power supplies and PWM generators. |
| Common-Mode Input Range | 0 V to VCC−1.5 V - allows direct sensing of ground-referenced signals (e.g., battery negative terminal) in single-supply configurations. |
Pinout & Package
TSSOP-8 package (4.3 mm × 3.1 mm × 1.05 mm body, 0.65 mm pitch); RoHS-compliant, lead-free, green molding compound; moisture sensitivity level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Open-collector output - requires external pull-up to define logic HIGH level and interface with TTL/CMOS loads. |
| 2 | Inverting Input 1 | Negative input of Comparator 1 - accepts reference or sensed signal for threshold comparison. |
| 3 | Non-Inverting Input 1 | Positive input of Comparator 1 - typically connected to sensor output or adjustable voltage divider. |
| 4 | GND | Analog ground reference - must be low-impedance return path shared with signal sources to minimize offset errors. |
| 5 | Non-Inverting Input 2 | Positive input of Comparator 2 - enables dual-threshold or window-comparator configurations. |
| 6 | Inverting Input 2 | Negative input of Comparator 2 - used for second reference or complementary sensing channel. |
| 7 | Output 2 | Open-collector output - independently controllable; supports OR-wired logic or dual-status indication. |
| 8 | VCC | Positive supply rail - powers both comparators; decoupling capacitor (0.1 µF) required near pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | Operates from 2 V to 36 V single supply - eliminates need for separate LDOs in multi-rail industrial or automotive subsystems. |
| Ground-Sensing Inputs | Input common-mode includes 0 V - enables direct monitoring of battery cell voltages or shunt resistor drops without level shifters. |
| Low Power Consumption | 0.6 mA supply current independent of VCC magnitude - critical for energy-harvesting and battery-backed applications. |
| High Output Drive | Sinks 16 mA at 200 mV saturation - directly interfaces with optocouplers, MOSFET gates, or microcontroller interrupt pins. |
| Robust Input Protection | Withstands −0.3 V to +40 V input voltage - tolerates transient overshoot and reverse-bias conditions in noisy environments. |
Applications
| Battery Charger Monitoring | DC-DC Converter Feedback |
|---|---|
|
Use Scenario: Detecting end-of-charge voltage thresholds and overvoltage faults in Li-ion or lead-acid battery charging circuits. IC Role / Device Role / Timing Role: Dual comparator performs high-accuracy voltage window detection on battery pack terminals using internal references or resistor dividers. Use Value: 1.0 mV offset ensures ±5 mV detection accuracy at 4.2 V, preventing overcharge and extending cycle life. |
Use Scenario: Providing precise overvoltage protection and undervoltage lockout in isolated flyback or buck-boost converters. IC Role / Device Role / Timing Role: Compares regulated output against stable reference to trigger shutdown or fault signaling within 200 ns. Use Value: 200 ns response time enables fast reaction to output transients before downstream components are damaged. |
| PC Motherboard Power Sequencing | Cordless Telephone Battery Management |
|
Use Scenario: Validating correct ramp-up sequence of +3.3 V, +5 V, and +12 V rails during system boot. IC Role / Device Role / Timing Role: Each comparator monitors one rail against its dedicated threshold; outputs feed AND logic for power-good assertion. Use Value: Independent open-collector outputs allow wired-OR configuration without additional logic gates or pull-ups. |
Use Scenario: Monitoring NiMH battery voltage during charge/discharge cycles in cordless handsets and base stations. IC Role / Device Role / Timing Role: One comparator detects full-charge cutoff (ΔV/dt zero-crossing proxy), the other detects deep-discharge condition. Use Value: 25 nA input bias current prevents loading of high-resistance voltage dividers used in compact handset PCB layouts. |
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 input offset voltage (2.0 mV typ), higher supply current (0.8 mA typ), same SO-8/TSSOP-8 footprint. | Less suitable for sub-10 mV threshold detection; acceptable where cost is primary constraint and accuracy <15 mV suffices. | Select when legacy design reuse or distributor stock availability outweighs precision requirements. |
| AS393AMTR-E1 | Tighter offset spec (≤3.0 mV max), same pinout and electrical behavior, but only available in SO-8 package. | Preferred for new designs requiring guaranteed low-offset performance in space-constrained layouts where TSSOP-8 is not mandatory. | Choose when AEC-Q200 qualification is unnecessary and SO-8 thermal performance (108 °C/W) meets board-level cooling capability. |
Compared with LM393DR, AS393GTR-E1 delivers 50% lower offset and 25% lower quiescent current; versus AS393AMTR-E1, it offers identical precision in a smaller TSSOP-8 footprint but with higher thermal resistance-making it optimal for compact, low-power, non-automotive applications where layout area is constrained.
Availability
AS393GTR-E1 is available at Aetrix Electronics and suitable for battery chargers, DC-DC modules, and PC motherboards requiring stable component supply across industrial temperature ranges and long-term production cycles.
Supply support for AS393GTR-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 semiconductor company specializing in discrete, analog, and mixed-signal devices for power management, signal integrity, and protection applications.
The AS393/393A series belongs to Diodes' precision analog comparator product line, engineered for high-accuracy voltage monitoring in cost-sensitive, space-constrained industrial and consumer power systems.
FAQ
What is the maximum allowable input voltage for AS393GTR-E1?
The absolute maximum input voltage is −0.3 V to +40 V relative to GND, independent of supply voltage. This rating applies to both inverting and non-inverting inputs and permits safe operation during power sequencing transients or sensor overvoltage events without clamping diodes or external protection.
Can AS393GTR-E1 operate with a 3.3 V supply?
Yes - AS393GTR-E1 functions fully across 2 V to 36 V single-supply operation. At 3.3 V, it maintains 1.0 mV typical offset, 25 nA input bias current, and 200 ns response time, making it suitable for modern low-voltage embedded systems interfacing with 3.3 V microcontrollers and sensors.
Is AS393GTR-E1 pin-compatible with LM393?
Yes - AS393GTR-E1 uses the industry-standard TSSOP-8 pinout matching LM393, including identical pin assignments for outputs, inputs, VCC, and GND. No PCB redesign is needed for drop-in replacement, though layout should verify thermal pad clearance per Diodes' recommended pad dimensions.
Does AS393GTR-E1 require external pull-up resistors on its outputs?
Yes - its open-collector outputs require external pull-up resistors to define logic HIGH levels. Typical values range from 2.2 kΩ (for 10 MHz switching) to 100 kΩ (for ultra-low-power monitoring), selected based on load capacitance, speed requirement, and current budget per output.
AS393GTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
AS393GTR-E1 FAQ
1.How can I place an order for AS393GTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS393GTR-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 AS393GTR-E1 reliable?
The price and inventory of AS393GTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS393GTR-E1 is usually 5 days.
3.What payment methods are accepted for AS393GTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS393GTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS393GTR-E1?
AS393GTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS393GTR-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 AS393GTR-E1?
For technical support, including AS393GTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS393GTR-E1 requirements.
6.How does Aetrix verify that AS393GTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS393GTR-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 AS393GTR-E1 meets industry standards.
7.What is the process for return or replacement of AS393GTR-E1?
All AS393GTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS393GTR-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 AS393GTR-E1 part is unused and in its original packaging.
Return procedure for AS393GTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS393GTR-E1 Tags
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