Specifications
| Type | Description |
|---|---|
| Part Number | SN74HC244 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package Case | DB SSOP-20 7.2mm x 7.8mm body 7.2mm x 5.3mm; DW SOIC-20 12.80mm x 10.3mm body 12.8mm x 7.5mm; N PDIP-20 24.33mm x 9.4mm body 24.33mm x 6.35mm; NS SOP-20 12.6mm x 7.8mm body 12.6mm x 5.3mm; PW TSSOP-20 6.5mm x 6.4mm body 6.5mm x 4.4mm |
| Function | Octal buffers and line drivers with 3-state outputs; condition: SN74HC244 device family; source page 1 |
| Logic Organization | Two 4-bit buffers and drivers with separate output-enable inputs; condition: Each output-enable controls one 4-bit buffer group; source page 1 |
| Output Logic Polarity | Noninverting; condition: OE low passes A inputs to Y outputs; source page 1 |
| Output Enable Behavior | Outputs high-impedance when OE is high; condition: 3-state output mode; source page 1 |
| Supply Voltage Range | 2 to 6 V; condition: Recommended operating conditions; source page 4 |
| Nominal Supply Voltage | 5 V; condition: Recommended operating conditions; source page 4 |
| High-Level Input Voltage | min 1.5 V; condition: VCC = 2 V; source page 4 |
| High-Level Input Voltage | min 3.15 V; condition: VCC = 4.5 V; source page 4 |
| High-Level Input Voltage | min 4.2 V; condition: VCC = 6 V; source page 4 |
| Low-Level Input Voltage | max 0.5 V; condition: VCC = 2 V; source page 4 |
| Low-Level Input Voltage | max 1.35 V; condition: VCC = 4.5 V; source page 4 |
| Low-Level Input Voltage | max 1.8 V; condition: VCC = 6 V; source page 4 |
| Input Voltage Range | 0 to VCC; condition: Recommended operating conditions; source page 4 |
| Output Voltage Range | 0 to VCC; condition: Recommended operating conditions; source page 4 |
| Operating Free-Air Temperature | -40 to 125 °C; condition: SN74HC244; source page 4 |
| Input Transition Rise and Fall Time | max 1000 ns/V; condition: VCC = 2 V; source page 4 |
| Input Transition Rise and Fall Time | max 500 ns/V; condition: VCC = 4.5 V; source page 4 |
| Input Transition Rise and Fall Time | max 400 ns/V; condition: VCC = 6 V; source page 4 |
| Power Dissipation Capacitance | 35 pF; condition: Per buffer or driver, no load; source page 4 |
| Absolute Maximum Supply Voltage | -0.5 to 7 V; condition: Over operating free-air temperature range; source page 4 |
| Input Clamp Current | ±20 mA; condition: VI < 0 or VI > VCC; source page 4 |
| Output Clamp Current | ±20 mA; condition: VO < 0 or VO > VCC; source page 4 |
| Continuous Output Current | ±35 mA; condition: VO = 0 or VCC; source page 4 |
| Continuous Current Through VCC or GND | ±70 mA; condition: Absolute maximum rating; source page 4 |
| Junction Temperature | max 150 °C; condition: Absolute maximum rating; source page 4 |
| Storage Temperature | -65 to 150 °C; condition: Absolute maximum rating; source page 4 |
| ESD Rating HBM | ±2000 V; condition: SN74HC244, ANSI/ESDA/JEDEC JS-001; source page 4 |
| ESD Rating CDM | ±1000 V; condition: SN74HC244, JEDEC JESD22-C101; source page 4 |
| High-Level Output Voltage | min 1.9 V, typ 1.998 V; condition: TA = 25°C, IOH = -20 µA, VCC = 2 V, VI = VIH or VIL; source page 5 |
| High-Level Output Voltage | min 4.4 V, typ 4.499 V; condition: TA = 25°C, IOH = -20 µA, VCC = 4.5 V, VI = VIH or VIL; source page 5 |
| High-Level Output Voltage | min 5.9 V, typ 5.999 V; condition: TA = 25°C, IOH = -20 µA, VCC = 6 V, VI = VIH or VIL; source page 5 |
| High-Level Output Voltage | min 3.98 V, typ 4.3 V; condition: TA = 25°C, IOH = -6 mA, VCC = 4.5 V; source page 5 |
| High-Level Output Voltage | min 5.48 V, typ 5.8 V; condition: TA = 25°C, IOH = -7.8 mA, VCC = 6 V; source page 5 |
| Low-Level Output Voltage | typ 0.002 V, max 0.1 V; condition: TA = 25°C, IOL = 20 µA, VCC = 2 V, VI = VIH or VIL; source page 5 |
| Low-Level Output Voltage | typ 0.001 V, max 0.1 V; condition: TA = 25°C, IOL = 20 µA, VCC = 4.5 V, VI = VIH or VIL; source page 5 |
| Low-Level Output Voltage | typ 0.001 V, max 0.1 V; condition: TA = 25°C, IOL = 20 µA, VCC = 6 V, VI = VIH or VIL; source page 5 |
| Low-Level Output Voltage | typ 0.17 V, max 0.26 V; condition: TA = 25°C, IOL = 6 mA, VCC = 4.5 V; source page 5 |
| Low-Level Output Voltage | typ 0.15 V, max 0.26 V; condition: TA = 25°C, IOL = 7.8 mA, VCC = 6 V; source page 5 |
| Input Current | typ ±0.1 nA, max ±100 nA; condition: TA = 25°C, VI = VCC or 0, VCC = 6 V; source page 5 |
| 3-State Output Leakage Current | typ ±0.01 µA, max ±0.5 µA; condition: TA = 25°C, VO = VCC or 0, VI = VIH or VIL, VCC = 6 V; source page 5 |
| Supply Current | max 8 µA; condition: TA = 25°C, VI = VCC or 0, IO = 0, VCC = 6 V; source page 5 |
| Input Capacitance | typ 3 pF, max 10 pF; condition: TA = 25°C, VCC = 2 V to 6 V; source page 5 |
| Propagation Delay | typ 13 ns, max 23 ns; condition: TA = 25°C, from A input to Y output, VCC = 4.5 V, CL = 50 pF; source page 7 |
| Propagation Delay | typ 11 ns, max 20 ns; condition: TA = 25°C, from A input to Y output, VCC = 6 V, CL = 50 pF; source page 7 |
| Output Enable Time | typ 15 ns, max 30 ns; condition: TA = 25°C, from OE input to Y output, VCC = 4.5 V, CL = 50 pF; source page 7 |
| Output Disable Time | typ 15 ns, max 30 ns; condition: TA = 25°C, from OE input to Y output, VCC = 4.5 V, CL = 50 pF; source page 7 |
| Output Transition Time | typ 8 ns, max 12 ns; condition: TA = 25°C, to Y output, VCC = 4.5 V, CL = 50 pF; source page 7 |
| Datasheet Status | request_only |
Product Overview
The SN74HC244 provides noninverting output logic polarity. When OE is low, A inputs are passed to the corresponding Y outputs; when OE is high, the outputs enter a high-impedance 3-state mode. This structure supports grouped bus buffering and controlled line driving where output isolation is required.
Recommended operation spans a 2 to 6 V supply range, with 5 V identified as a nominal supply condition. Input and output voltage ranges are 0 to VCC, and the operating free-air temperature range for SN74HC244 is -40 to 125 °C. Timing data includes A-to-Y propagation delay of 13 ns typical and 23 ns maximum at 4.5 V with 50 pF load, and 11 ns typical and 20 ns maximum at 6 V with 50 pF load.
Package options include DB SSOP-20, DW SOIC-20, N PDIP-20, NS SOP-20, and PW TSSOP-20 formats with the listed body dimensions. Electrical limits include ±35 mA continuous output current, ±70 mA continuous current through VCC or GND, 150 °C maximum junction temperature, and ESD ratings of ±2000 V HBM and ±1000 V CDM.
Key Features
- Octal buffers and line drivers with 3-state outputs
- Two 4-bit buffer groups with separate output-enable inputs
- Noninverting outputs pass A inputs when OE is low
- Outputs enter high impedance when OE is high
- Recommended supply voltage range is 2 to 6 V
- Input and output voltage ranges are 0 to VCC
- SN74HC244 operating free-air temperature is -40 to 125 °C
- A-to-Y delay is 13 ns typical at 4.5 V
- Output enable and disable times are 15 ns typical
- Available in SSOP-20, SOIC-20, PDIP-20, SOP-20, TSSOP-20
Typical Applications
- Bus buffering
- Line driving
- 3-state bus isolation
- Grouped 4-bit signal control
- Noninverting logic buffering
- 5 V logic systems
- 2 to 6 V digital interfaces
Procurement Notes
When requesting a quote for SN74HC244, 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 is the SN74HC244 logic function?
The SN74HC244 is an octal buffer and line driver with 3-state outputs. It is organized as two 4-bit buffers and drivers, with separate output-enable inputs controlling each 4-bit group.
How do the SN74HC244 output-enable inputs work?
The outputs are noninverting. When OE is low, A inputs pass to the corresponding Y outputs. When OE is high, the outputs switch to high impedance for 3-state output mode.
What supply voltage range does SN74HC244 support?
The recommended operating supply voltage range is 2 to 6 V, with 5 V listed as a nominal supply condition. The recommended input and output voltage ranges are both 0 to VCC.
What packages are listed for SN74HC244?
Package options listed include DB SSOP-20, DW SOIC-20, N PDIP-20, NS SOP-20, and PW TSSOP-20. The extracted package data includes body dimensions for each of these package cases.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 13, 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.