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Diodes Incorporated AS393P-E1
- Part No.:
- AS393P-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AS393P-E1.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:948
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Product details
Overview
AS393P-E1 from Diodes Incorporated is a dual precision voltage 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, switching power supplies, and PC motherboards.
For engineers reviewing the AS393P-E1 datasheet, AS393P-E1 pinout, AS393P-E1 application, or AS393P-E1 equivalent, this page delivers verified electrical parameters, PDIP-8 package details, functional role in overvoltage detection and power sequencing, and validated alternative options for dual-comparator designs requiring low offset and wide supply range.
Technical Context
The AS393P-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 open-collector outputs support wired-AND logic and level translation across voltage domains.
It features low input bias current (25 nA typ), low input offset current (±5.0 nA typ), and differential input voltage tolerance equal to the supply voltage (40 V max). Thermal resistance is 9 °C/W (junction-to-case) and 108 °C/W (junction-to-ambient) in PDIP-8.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1.0 mV typical - enables accurate threshold detection at sub-millivolt levels in precision sensing circuits |
| Supply Current | 0.6 mA typical at VCC = 5 V - supports low-power operation in battery-backed systems |
| Input Bias Current | 25 nA typical - minimizes error in high-impedance reference or sensor interfaces |
| Supply Voltage Range | Single: 2 V to 36 V; Dual: ±1.0 V to ±18 V - accommodates industrial, automotive, and legacy 5 V/12 V/24 V rails |
| Output Type | Open-collector - allows flexible pull-up selection, wired-AND configuration, and interface with mixed-voltage logic |
| Input Common-Mode Range | 0 V to VCC−1.5 V - supports direct ground-referenced inputs without level-shifting circuitry |
| Large-Signal Response Time | 200 ns typical - suitable for fast overvoltage protection and PWM feedback loops |
Pinout & Package
AS393P-E1 is housed in an 8-pin PDIP (Plastic Dual In-line Package) with 0.300-inch body width, 2.54 mm lead pitch, and through-hole mounting. Lead finish is matte tin per MIL-STD-202, Method 208.
| 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 terminal for comparator 1; accepts signals within common-mode range |
| 3 | Non-inverting Input 1 | Positive input terminal for comparator 1; used for threshold or reference comparison |
| 4 | GND | Ground reference for both comparators and internal circuitry; return path for sink current |
| 5 | Non-inverting Input 2 | Positive input terminal for comparator 2; supports independent signal monitoring |
| 6 | Inverting Input 2 | Negative input terminal for comparator 2; enables dual-threshold or window-comparison topologies |
| 7 | Output 2 | Open-collector output of comparator 2; electrically isolated from Output 1 |
| 8 | VCC | Positive supply rail; powers both comparators; supports up to 40 V absolute max |
Key Features
| Feature | Design Value |
|---|---|
| Low input offset voltage | 1.0 mV typical - reduces decision error in precision voltage monitoring applications |
| Wide single-supply operation | 2 V to 36 V - eliminates need for auxiliary regulators in multi-rail systems |
| Input common-mode range includes ground | 0 V minimum - enables direct connection to ground-referenced sensors or battery terminals |
| Open-collector outputs | Supports 5 V, 3.3 V, or 1.8 V logic-level interfacing via external pull-up selection |
| Lead-free and RoHS-compliant | Pb-free construction with halogen- and antimony-free "Green" molding compound (per EU directives) |
Applications
| Battery Charger Monitoring | DC-DC Module Feedback |
|---|---|
|
Use Scenario: Detecting overvoltage and end-of-charge conditions during Li-ion battery charging cycles. IC Role / Device Role / Timing Role: Dual comparator monitors cell voltage against upper/lower thresholds and triggers charge termination or fault signaling. Use Value: 1.0 mV offset ensures ≤10 mV total error in 4.2 V threshold detection, improving battery safety and cycle life. |
Use Scenario: Providing precise undervoltage lockout (UVLO) and overvoltage protection (OVP) in isolated DC-DC converters. IC Role / Device Role / Timing Role: One comparator senses primary-side VIN; second monitors secondary-side output via optocoupler feedback loop. Use Value: 200 ns response time enables fast shutdown (<1 µs) during transient overvoltage events, protecting downstream loads. |
| PC Motherboard Power Sequencing | Industrial Switching Power Supply |
|
Use Scenario: Validating correct ramp-up timing and voltage levels of +3.3 V, +5 V, and +12 V rails during system boot. IC Role / Device Role / Timing Role: Each comparator independently verifies individual rail thresholds before enabling subsequent power stages. Use Value: Independent open-collector outputs allow direct OR-ing into a single power-good signal without additional logic gates. |
Use Scenario: Implementing current-limit and thermal-foldback protection in 24 V industrial SMPS units. IC Role / Device Role / Timing Role: Compares shunt voltage and temperature-sensor output against programmable references to modulate gate drive. Use Value: Low 25 nA input bias current prevents loading of high-resistance current-sense networks, preserving measurement accuracy. |
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 2.0 mV max offset (vs. AS393P-E1's 5.0 mV max); 0.8 mA supply current; same SO-8/PDIP-8 footprint | Less suited for sub-10 mV threshold accuracy; widely available but not optimized for ultra-low-offset use cases | Select LM393DR only when cost sensitivity outweighs precision requirements and PDIP-8 is acceptable |
| TL393CP | 2.5 mV max offset; 0.4 mA supply current; identical PDIP-8 package and pinout | Lower quiescent current but higher offset limits resolution in fine-tolerance monitoring | Prefer TL393CP where standby power is critical and 2.5 mV offset meets system margin |
Compared with LM393DR and TL393CP, AS393P-E1 delivers superior offset performance (1.0 mV typ) while maintaining full PDIP-8 compatibility-making it the optimal choice for applications demanding high-accuracy voltage window detection without redesigning the PCB layout.
Availability
AS393P-E1 is available at Aetrix Electronics and suitable for battery chargers, PC motherboards, and industrial switching power supplies requiring stable component supply and long-term obsolescence management.
Supply support for AS393P-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 components for industrial, computing, and consumer applications.
The AS393/393A series belongs to Diodes' precision analog comparator product line, engineered for applications requiring low offset, wide supply range, and robust operation in noisy or thermally variable environments.
FAQ
What is the maximum allowable differential input voltage for AS393P-E1?
The absolute maximum differential input voltage is 40 V, as specified in the Absolute Maximum Ratings table. This rating holds regardless of supply voltage magnitude and ensures safe operation even with large input transients or mismatched signal sources.
Can AS393P-E1 operate with a single 3.3 V supply?
Yes. The AS393P-E1 supports single-supply operation from 2 V to 36 V, including 3.3 V. Its input common-mode range extends to ground and up to VCC−1.5 V (i.e., 1.8 V at 3.3 V supply), enabling direct interface with 3.3 V microcontrollers and sensors.
Is AS393P-E1 pin-compatible with standard LM393 in PDIP-8?
Yes. AS393P-E1 uses the industry-standard 8-pin PDIP layout matching LM393, with identical pin assignments: Output 1, In–1, In+1, GND, In+2, In–2, Output 2, VCC. No PCB redesign is needed for drop-in replacement where enhanced offset and bias performance are required.
Why does AS393P-E1 specify "EOL" status in the ordering table?
AS393P-E1 is marked End-of-Life (EOL) per Diodes' official documentation, indicating no new production runs are planned. However, Aetrix Electronics maintains active inventory and offers extended lifecycle support, including last-time-buy planning and cross-reference guidance for migration paths.
AS393P-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- 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:
- Through Hole
- :
- 8-PDIP
AS393P-E1 FAQ
1.How can I place an order for AS393P-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS393P-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 AS393P-E1 reliable?
The price and inventory of AS393P-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS393P-E1 is usually 5 days.
3.What payment methods are accepted for AS393P-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS393P-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS393P-E1?
AS393P-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS393P-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 AS393P-E1?
For technical support, including AS393P-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS393P-E1 requirements.
6.How does Aetrix verify that AS393P-E1 is sourced from the original manufacturer or authorized distributors?
All AS393P-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 AS393P-E1 meets industry standards.
7.What is the process for return or replacement of AS393P-E1?
All AS393P-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS393P-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 AS393P-E1 part is unused and in its original packaging.
Return procedure for AS393P-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS393P-E1 Tags
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