Specifications
| Type | Description |
|---|---|
| Part Number | SN74LS244 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package Case | 20-pin SSOP DB 7.20 mm x 5.30 mm; SOIC DW 12.80 mm x 7.50 mm; PDIP N 24.33 mm x 6.35 mm; SOP NS 7.80 mm x 12.60 mm |
| Function | Octal buffer and line driver with 3-state outputs |
| Output Polarity | Non-inverting outputs |
| Logic Input Compatibility | Inputs tolerant down to 2 V, compatible with 3.3-V or 2.5-V logic inputs |
| Maximum Propagation Delay | 15 ns |
| Output Type | 3-state outputs |
| Input Stage | PNP inputs reduce DC loading |
| Input Hysteresis | Improves noise margins |
| Noise Margin | 400 mV |
| Terminated Line Drive Capability | 133 ohm minimum terminated line |
| Supply Voltage Absolute Maximum | 7 V |
| Input Voltage Absolute Maximum | 7 V |
| Off-State Output Voltage Absolute Maximum | 5.5 V |
| Storage Temperature | -65 to 150 °C |
| ESD HBM | 500 V |
| ESD CDM | 500 V |
| Supply Voltage Recommended | 4.75 V min, 5 V nom, 5.25 V max |
| High-Level Input Voltage | 2 V min |
| Low-Level Input Voltage | 0.8 V max |
| High-Level Output Current | -15 mA |
| Low-Level Output Current | 24 mA |
| Operating Free-Air Temperature | 0 to 70 °C |
| Thermal Resistance Junction-to-Ambient, DB SSOP 20-pin | 94.3 °C/W |
| Thermal Resistance Junction-to-Ambient, DW SOIC 20-pin | 90.3 °C/W |
| Thermal Resistance Junction-to-Ambient, N PDIP 20-pin | 50.6 °C/W |
| Thermal Resistance Junction-to-Ambient, NS SOP 20-pin | 76.6 °C/W |
| Thermal Resistance Junction-to-Case Top, DB SSOP 20-pin | 55.9 °C/W |
| Thermal Resistance Junction-to-Case Top, DW SOIC 20-pin | 45.5 °C/W |
| Thermal Resistance Junction-to-Case Top, N PDIP 20-pin | 37.4 °C/W |
| Thermal Resistance Junction-to-Case Top, NS SOP 20-pin | 42.9 °C/W |
| Thermal Resistance Junction-to-Board, DB SSOP 20-pin | 49.5 °C/W |
| Thermal Resistance Junction-to-Board, DW SOIC 20-pin | 48.1 °C/W |
| Thermal Resistance Junction-to-Board, N PDIP 20-pin | 31.5 °C/W |
| Thermal Resistance Junction-to-Board, NS SOP 20-pin | 44.1 °C/W |
| Input Clamp Voltage | -1.5 V max |
| Input Hysteresis Voltage | 0.2 V typ, 0.4 V max |
| High-Level Output Voltage | 2.4 V min, 3.4 V typ |
| High-Level Output Voltage | 2 V min |
| Low-Level Output Voltage | 0.5 V max |
| Off-State High-Level Output Current | 20 µA max |
| Off-State Low-Level Output Current | -20 µA max |
| Input Current at Maximum Input Voltage | 0.1 mA max |
| High-Level Input Current | 20 µA max |
| Low-Level Input Current | -0.2 mA max |
| Short-Circuit Output Current | -40 mA typ, -225 mA max |
| Supply Current Outputs High | 17 mA typ, 27 mA max |
| Supply Current Outputs Low | 27 mA typ, 46 mA max |
| Supply Current Outputs Disabled | 32 mA typ, 54 mA max |
| Propagation Delay Low-to-High | 12 ns typ, 18 ns max |
| Propagation Delay High-to-Low | 12 ns typ, 18 ns max |
| Output Enable Delay to Low | 20 ns typ, 30 ns max |
| Output Enable Delay to High | 15 ns typ, 23 ns max |
| Output Disable Delay from Low | 10 ns typ, 20 ns max |
| Output Disable Delay from High | 15 ns typ, 25 ns max |
| Pin Count | 20 pins |
| Power Pin | VCC on pin 20 |
| Ground Pin | GND on pin 10 |
| Channel 1 Output Enable Pin | 1G on pin 1 |
| Channel 2 Output Enable Pin | 2G/2G on pin 19 |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments SN74LS244 is an octal buffer and line driver in the Signal_Chain category. It provides non-inverting outputs and 3-state output control for bus line or memory address register drive applications. The input structure includes PNP inputs to reduce DC loading, while input hysteresis improves noise margins; the datasheet description lists a 400 mV noise margin.
The device is specified for 5 V TTL operation with a recommended supply range of 4.75 V minimum, 5 V nominal, and 5.25 V maximum. Recommended logic thresholds include 2 V minimum high-level input voltage and 0.8 V maximum low-level input voltage. Electrical data includes 2.4 V minimum high-level output voltage at IOH = -3 mA and 0.5 V maximum low-level output voltage at IOL = 24 mA.
Package options include 20-pin SSOP DB, SOIC DW, PDIP N, and SOP NS packages. Pin functions identify VCC on pin 20, GND on pin 10, 1G on pin 1, and 2G/2G on pin 19. Absolute maximum ratings include 7 V supply voltage, 7 V input voltage, 5.5 V off-state output voltage, and -65 to 150 °C storage temperature.
Key Features
- Octal buffer and line driver function
- 3-state outputs for bus line drive
- Non-inverting output polarity
- Inputs tolerate down to 2 V
- Compatible with 3.3-V or 2.5-V logic inputs
- 15 ns maximum propagation delay listed in features
- PNP inputs reduce DC loading
- Input hysteresis improves noise margins
- 400 mV noise margin
- 133 ohm minimum terminated line drive capability
Typical Applications
- Bus line drive
- Memory address register drive
- 3-state bus interfaces
- 5 V TTL signal buffering
- Logic level input interfacing
- Terminated line driving
Procurement Notes
When requesting a quote for SN74LS244, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of device is the SN74LS244?
The SN74LS244 is an octal buffer and line driver from Texas Instruments. It has 3-state outputs, non-inverting output polarity, and is identified in the provided facts as a Signal_Chain component.
What supply voltage is recommended for SN74LS244 operation?
The recommended supply voltage is listed as 4.75 V minimum, 5 V nominal, and 5.25 V maximum for applicable 5-V TTL operation. The absolute maximum supply voltage is 7 V with respect to ground.
Which packages and pin count are specified for the SN74LS244?
The extracted facts list 20-pin SSOP DB, SOIC DW, PDIP N, and SOP NS package options. The pin configuration identifies VCC on pin 20 and GND on pin 10.
What timing parameters are provided for the SN74LS244?
The timing data includes 12 ns typical and 18 ns maximum low-to-high and high-to-low propagation delays at VCC = 5 V and TA = 25 °C. Output enable and disable delay values are also specified.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.