SN74ALS1244ADWIn StockTexas Instruments
SN74ALS1244ADW is an octal buffer and line driver IC with 3-state outputs and active-low enable control. Features ALS logic family with 50pF load capacitance, 16mA output current, and 20-pin SOIC package. From $5.57 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS1244ADW Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.5700(MOQ 34)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal (8-bit) 3-state buffer and line driver with active-low enable for unidirectional bus driving
- ALS (Advanced Low-power Schottky) logic family offering improved speed and lower power than standard LS TTL
- 20-pin SOIC (R-PDSO-G20) surface-mount package for compact PCB designs
- 16mA output sink current capability supporting standard TTL and CMOS bus loads up to 50pF
- Dual 4-bit enable control structure allowing flexible partial-bus gating
Applications
The SN74ALS1244ADW is widely used in address and data bus buffering for microprocessor systems, where its 3-state outputs allow multiple drivers to share a common bus without contention. It is also applied in memory interface circuits, industrial control backplanes, and communication equipment where robust TTL-level signal driving and isolation between bus segments are required.
Specifications
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | ALS |
| JESD-30 Code | R-PDSO-G20 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.016A |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 17mA |
| Prop. Delay@Nom-Sup | 14ns |
| Propagation Delay (tpd) | 14ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output current and voltage specification of the SN74ALS1244ADW?
The SN74ALS1244ADW has a maximum output low current (IOL) of 16mA (0.016A), which is suitable for driving standard TTL and CMOS loads. It operates with a supply voltage of 5V typical for ALS-family logic devices and supports a load capacitance of 50pF per output.
What does the active-low enable control mean on the SN74ALS1244ADW?
The active-low enable (OE#) means the outputs are enabled when the control pin is driven LOW. When the enable pin is HIGH, all outputs enter a high-impedance (3-state) condition, effectively disconnecting the device from the bus and allowing other drivers to take control without signal conflict.
What are typical applications for the SN74ALS1244ADW?
Typical applications include microprocessor address and data bus buffering, memory interface circuits, industrial control backplanes, and communication system bus drivers. Its unidirectional drive capability and 3-state outputs make it ideal for systems where multiple sources share a common data or address bus.
What package does the SN74ALS1244ADW come in and what is its pin count?
The SN74ALS1244ADW comes in a 20-pin SOIC (Small Outline Integrated Circuit) package, designated as R-PDSO-G20. The SOIC surface-mount package is suitable for automated PCB assembly and offers a compact footprint compared to DIP alternatives.
Is the SN74ALS1244ADW compatible with CMOS or other logic families?
Yes, the SN74ALS1244ADW belongs to the ALS (Advanced Low-power Schottky) TTL family and is compatible with standard TTL input and output levels. It can interface with CMOS logic operating at 5V, and its 3-state outputs are compatible with mixed-logic bus systems commonly found in legacy and industrial designs.
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About Texas Instruments
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 34+ | $8.7000 | $295.80 |
| 75+ | $5.7087 | $428.15 |
| 10000+ | $5.5700 | $55700.00 |
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