Specifications
| Type | Description |
|---|---|
| Part Number | SN74AHC244 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | DB (SSOP-20) 7.2 mm x 7.8 mm package, 7.50 mm x 5.30 mm body; DW (SOIC-20) 12.80 mm x 10.3 mm package, 12.8 mm x 7.5 mm body; N (PDIP-20) 24.33 mm x 9.4 mm package, 25.40 mm x 6.35 mm body; NS (SOP-20) 12.60 mm x 7.8 mm package, 12.6 mm x 5.30 mm body; DGV (TVSOP-20) 5.00 mm x 6.4 mm package, 5.00 mm x 4.40 mm body; PW (TSSOP-20) 6.50 mm x 6.4 mm package, 6.50 mm x 4.40 mm body; DGS (VSSOP-20) 5.10 mm x 4.90 mm package, 5.10 mm x 3.00 mm body; RKS (VQFN-20) 4.50 mm x 2.50 mm package/body |
| Supply voltage operating range | 2 V to 5.5 V; recommended operating conditions |
| Absolute maximum supply voltage | -0.5 V to 7 V; over operating free-air temperature range |
| Absolute maximum input voltage | -0.5 V to 7 V; input and output current ratings observed |
| Absolute maximum output voltage range | -0.5 V to VCC + 0.5 V; output voltage range |
| Input clamp current | -20 mA; VI < 0 V |
| Output clamp current | ±20 mA; VO < 0 V or VO > VCC |
| Continuous output current | ±25 mA; VO = 0 V to VCC |
| Continuous current through VCC or GND | ±50 mA; each VCC or GND pin |
| Storage temperature | -65°C to 150°C; absolute maximum rating |
| ESD rating, HBM | ±2000 V; ANSI/ESDA/JEDEC JS-001, all pins |
| ESD rating, CDM | ±1500 V; JEDEC JESD22-C101, all pins |
| High-level input voltage | 1.5 V min; VCC = 2 V |
| High-level input voltage | 2.1 V min; VCC = 3 V |
| High-level input voltage | 3.85 V min; VCC = 5.5 V |
| Low-level input voltage | 0.5 V max; VCC = 2 V |
| Low-level input voltage | 0.9 V max; VCC = 3 V |
| Low-level input voltage | 1.65 V max; VCC = 5.5 V |
| Input voltage operating range | 0 V to 5.5 V; recommended operating conditions |
| Output voltage operating range | 0 V to VCC; recommended operating conditions |
| High-level output current | -50 µA; VCC = 2 V |
| High-level output current | -4 mA; VCC = 3.3 V ± 0.3 V |
| High-level output current | -8 mA; VCC = 5 V ± 0.5 V |
| Low-level output current | 50 µA; VCC = 2 V |
| Low-level output current | 4 mA; VCC = 3.3 V ± 0.3 V |
| Low-level output current | 8 mA; VCC = 5 V ± 0.5 V |
| Input transition rise or fall rate | 100 ns/V max; VCC = 3.3 V ± 0.3 V |
| Input transition rise or fall rate | 20 ns/V max; VCC = 5 V ± 0.5 V |
| Operating free-air temperature | -40°C to 125°C; SN74AHC244 |
| High-level output voltage | 1.9 V min, 2 V typ; IOH = -50 µA, VCC = 2 V, TA = 25°C; SN74AHC244 min 1.9 V over temperature |
| High-level output voltage | 2.9 V min, 3 V typ; IOH = -50 µA, VCC = 3 V, TA = 25°C; SN74AHC244 min 2.9 V over temperature |
| High-level output voltage | 4.4 V min, 4.5 V typ; IOH = -50 µA, VCC = 4.5 V, TA = 25°C; SN74AHC244 min 4.4 V over temperature |
| High-level output voltage | 2.58 V min at 25°C; 2.48 V min over temperature; IOH = -4 mA, VCC = 3 V |
| High-level output voltage | 3.94 V min at 25°C; 3.8 V min over temperature; IOH = -8 mA, VCC = 4.5 V |
| Low-level output voltage | 0.1 V typ/max; IOL = 50 µA, VCC = 2 V, 3 V, or 4.5 V |
| Low-level output voltage | 0.36 V typ, 0.44 V max for SN74AHC244; IOL = 4 mA, VCC = 3 V |
| Low-level output voltage | 0.36 V typ, 0.44 V max for SN74AHC244; IOL = 8 mA, VCC = 4.5 V |
| Input leakage current | ±0.1 µA typ, ±1 µA max; VI = 5.5 V or GND, VCC = 0 V to 5.5 V |
| Off-state output current | ±0.25 µA typ, ±2.5 µA max; VO = VCC or GND, VI(OE) = VIL or VIH, VCC = 5.5 V |
| Supply current | 4 µA typ, 40 µA max; VI = VCC or GND, IO = 0, VCC = 5.5 V |
| Input capacitance | 2 pF typ, 10 pF max; VI = VCC or GND, VCC = 5 V |
| Output capacitance | 3.5 pF typ; VO = VCC or GND, VCC = 5 V |
| Propagation delay tPLH/tPHL | 5.8 ns typ, 10 ns max for SN74AHC244; A to Y, VCC = 3.3 V ± 0.3 V, CL = 15 pF |
| Output enable delay tPZH/tPZL | 6.6 ns typ, 12.5 ns max for SN74AHC244; OE to Y, VCC = 3.3 V ± 0.3 V, CL = 15 pF |
| Output disable delay tPHZ/tPLZ | 5 ns typ, 11 ns max for SN74AHC244; OE to Y, VCC = 3.3 V ± 0.3 V, CL = 15 pF |
| Propagation delay tPLH/tPHL | 8.3 ns typ, 13.5 ns max for SN74AHC244; A to Y, VCC = 3.3 V ± 0.3 V, CL = 50 pF |
| Output enable delay tPZH/tPZL | 9.1 ns typ, 16 ns max for SN74AHC244; OE to Y, VCC = 3.3 V ± 0.3 V, CL = 50 pF |
| Output disable delay tPHZ/tPLZ | 10.3 ns typ, 16 ns max for SN74AHC244; OE to Y, VCC = 3.3 V ± 0.3 V, CL = 50 pF |
| Output skew | 1.5 ns max; VCC = 3.3 V ± 0.3 V, CL = 50 pF |
| Propagation delay tPLH/tPHL | 3.9 ns typ, 6.5 ns max for SN74AHC244; A to Y, VCC = 5 V ± 0.5 V, CL = 15 pF |
| Output enable delay tPZH/tPZL | 4.7 ns typ, 8.5 ns max for SN74AHC244; OE to Y, VCC = 5 V ± 0.5 V, CL = 15 pF |
| Output disable delay tPHZ/tPLZ | 5 ns typ, 8.5 ns max for SN74AHC244; OE to Y, VCC = 5 V ± 0.5 V, CL = 15 pF |
| Propagation delay tPLH/tPHL | 5.4 ns typ, 8.5 ns max for SN74AHC244; A to Y, VCC = 5 V ± 0.5 V, CL = 50 pF |
| Output enable delay tPZH/tPZL | 6.2 ns typ, 10.5 ns max for SN74AHC244; OE to Y, VCC = 5 V ± 0.5 V, CL = 50 pF |
| Output disable delay tPHZ/tPLZ | 6.7 ns typ, 10.5 ns max for SN74AHC244; OE to Y, VCC = 5 V ± 0.5 V, CL = 50 pF |
| Output skew | 1 ns max; VCC = 5 V ± 0.5 V, CL = 50 pF |
| Quiet output maximum dynamic VOL | 0.5 V; VCC = 5 V, CL = 50 pF, TA = 25°C; surface-mount packages only |
| Quiet output minimum dynamic VOL | -0.2 V; VCC = 5 V, CL = 50 pF, TA = 25°C; surface-mount packages only |
| Quiet output minimum dynamic VOH | 4.8 V; VCC = 5 V, CL = 50 pF, TA = 25°C; surface-mount packages only |
| High-level dynamic input voltage | 3.5 V; VCC = 5 V, CL = 50 pF, TA = 25°C; surface-mount packages only |
| Low-level dynamic input voltage | 1.5 V; VCC = 5 V, CL = 50 pF, TA = 25°C; surface-mount packages only |
| Power dissipation capacitance | 8.6 pF typ; VCC = 5 V, TA = 25°C, no load, f = 1 MHz |
| Function | Octal buffers/drivers with 3-state outputs; device description |
| Latch-up performance | Exceeds 250 mA; per JESD 17 |
| Thermal pad connection | Connect to GND or leave floating; do not connect to other signal or supply; RKS package only |
| Datasheet Status | request_only |
Product Overview
The SN74AHC244 is a Texas Instruments Signal_Chain device described as an octal buffer driver with 3-state outputs. Its recommended supply voltage range is 2 V to 5.5 V, with an input operating range of 0 V to 5.5 V and an output operating range of 0 V to VCC. Logic input thresholds are specified at 2 V, 3 V, and 5.5 V supplies, supporting use across multiple low-voltage logic rails.
Output drive conditions include high-level output currents of -50 µA at 2 V, -4 mA at 3.3 V ± 0.3 V, and -8 mA at 5 V ± 0.5 V, with matching low-level output current ratings of 50 µA, 4 mA, and 8 mA. Timing data covers A-to-Y propagation delay and OE-to-Y output enable or disable delay at 3.3 V and 5 V rails with 15 pF and 50 pF loads.
Available packages include DB, DW, N, NS, DGV, PW, DGS, and RKS formats. For the RKS package, the thermal pad must be connected to GND or left floating and must not be connected to another signal or supply. The device is specified from -40°C to 125°C operating free-air temperature.
Key Features
- Octal buffer driver with 3-state outputs
- 2 V to 5.5 V recommended supply range
- 0 V to 5.5 V input operating range
- 0 V to VCC output operating range
- -40°C to 125°C operating free-air temperature
- A-to-Y propagation delays specified at 3.3 V and 5 V
- OE-controlled output enable and disable timing specified
- Output skew rated to 1 ns at 5 V
- HBM ESD rating of ±2000 V on all pins
- CDM ESD rating of ±1500 V on all pins
- Input capacitance 2 pF typical, 10 pF maximum
- RKS thermal pad connects to GND or floats
Typical Applications
- Digital signal buffering
- Octal logic line driving
- 3-state bus interfaces
- Output enable controlled signal paths
- Low-voltage logic fanout
- Surface-mount digital assemblies
- PDIP logic board assemblies
- VQFN compact logic layouts
Procurement Notes
When requesting a quote for SN74AHC244, 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 supply voltage range does the SN74AHC244 support?
The SN74AHC244 has a recommended operating supply voltage range of 2 V to 5.5 V. Its absolute maximum supply voltage rating is -0.5 V to 7 V over the operating free-air temperature range.
What output timing is specified for the SN74AHC244?
The datasheet specifies A-to-Y propagation delay and OE-to-Y output enable and disable delays at 3.3 V ± 0.3 V and 5 V ± 0.5 V, using 15 pF and 50 pF load capacitance conditions.
Which packages are listed for the SN74AHC244?
Package options include DB SSOP-20, DW SOIC-20, N PDIP-20, NS SOP-20, DGV TVSOP-20, PW TSSOP-20, DGS VSSOP-20, and RKS VQFN-20. The RKS thermal pad must connect to GND or remain floating.
What temperature range is specified for this device?
The SN74AHC244 is specified for an operating free-air temperature range of -40°C to 125°C. The absolute maximum storage temperature range is -65°C to 150°C.
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.