Specifications
| Type | Description |
|---|---|
| Part Number | SN74HC245NSR |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | NS (SO/SOP, 20), 12.60 mm × 5.30 mm nominal body |
| Function | Octal bus transceiver with 3-state outputs; condition: asynchronous two-way communication between data buses; source page 1 |
| Operating Supply Voltage | 2 V to 6 V; condition: recommended operating condition; source page 4 |
| Nominal Supply Voltage | 5 V; condition: recommended operating condition; source page 4 |
| High-Level Input Voltage at VCC = 2 V | min 1.5 V; source page 4 |
| High-Level Input Voltage at VCC = 4.5 V | min 3.15 V; source page 4 |
| High-Level Input Voltage at VCC = 6 V | min 4.2 V; source page 4 |
| Low-Level Input Voltage at VCC = 2 V | max 0.5 V; source page 4 |
| Low-Level Input Voltage at VCC = 4.5 V | max 1.35 V; source page 4 |
| Low-Level Input Voltage at VCC = 6 V | max 1.8 V; source page 4 |
| Input Voltage Range | 0 V to VCC; condition: recommended operating condition; source page 4 |
| Output Voltage Range | 0 V to VCC; condition: recommended operating condition; source page 4 |
| Input Transition Rise/Fall Time at VCC = 2 V | max 1000 ns; source page 4 |
| Input Transition Rise/Fall Time at VCC = 4.5 V | max 500 ns; source page 4 |
| Input Transition Rise/Fall Time at VCC = 6 V | max 400 ns; source page 4 |
| Operating Free-Air Temperature | -40°C to 85°C; condition: SN74HC245; source page 4 |
| Absolute Maximum Supply Voltage | -0.5 V 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 V to VCC; source page 4 |
| Continuous Current Through VCC or GND | ±70 mA; condition: absolute maximum rating; source page 4 |
| Storage Temperature | -65°C to 150°C; condition: absolute maximum rating; source page 4 |
| Junction Temperature | 150°C; condition: absolute maximum rating; source page 4 |
| ESD Rating HBM | ±3000 V; condition: human body model per ANSI/ESDA/JEDEC JS-001; source page 4 |
| ESD Rating CDM | ±1000 V; condition: charged-device model per JEDEC JESD22-C101; source page 4 |
| High-Level Output Voltage at 4.5 V | min 3.84 V; condition: SN74HC245, VCC = 4.5 V, IOH = -6 mA, VI = VIH or VIL; source page 5 |
| High-Level Output Voltage at 6 V | min 5.34 V; condition: SN74HC245, VCC = 6 V, IOH = -7.8 mA, VI = VIH or VIL; source page 5 |
| Low-Level Output Voltage at 4.5 V | max 0.33 V; condition: SN74HC245, VCC = 4.5 V, IOL = 6 mA, VI = VIH or VIL; source page 5 |
| Low-Level Output Voltage at 6 V | max 0.33 V; condition: SN74HC245, VCC = 6 V, IOL = 7.8 mA, VI = VIH or VIL; source page 5 |
| Input Current | max ±1000 nA; condition: SN74HC245, DIR or OE, VCC = 6 V, VI = VCC or 0 V; source page 5 |
| Off-State Output Current | max ±5 µA; condition: SN74HC245, A or B output, VCC = 6 V, VO = VCC or 0 V; source page 5 |
| Supply Current | max 80 µA; condition: SN74HC245, VCC = 6 V, VO = VCC or 0 V, IO = 0; source page 5 |
| Input Capacitance | max 10 pF; condition: SN74HC245, DIR or OE, input 2 V to 6 V; source page 5 |
| Propagation Delay at 4.5 V, 50 pF | typ 15 ns, max 26 ns; condition: SN74HC245, A or B to B or A; source page 6 |
| Propagation Delay at 6 V, 50 pF | typ 12 ns, max 22 ns; condition: SN74HC245, A or B to B or A; source page 6 |
| Output Enable Time at 4.5 V, 50 pF | typ 23 ns, max 58 ns; condition: SN74HC245, OE to A or B; source page 6 |
| Output Disable Time at 4.5 V, 50 pF | typ 25 ns, max 50 ns; condition: SN74HC245, OE to A or B; source page 6 |
| Output Transition Time at 4.5 V, 50 pF | typ 8 ns, max 15 ns; condition: SN74HC245, A or B output; source page 6 |
| Propagation Delay at 4.5 V, 150 pF | typ 18 ns, max 34 ns; condition: SN74HC245, A or B to B or A; source page 6 |
| Output Enable Time at 4.5 V, 150 pF | typ 31 ns, max 67 ns; condition: SN74HC245, OE to A or B; source page 6 |
| Output Transition Time at 4.5 V, 150 pF | typ 17 ns, max 53 ns; condition: SN74HC245, A or B output; source page 6 |
| Power Dissipation Capacitance | typ 40 pF; condition: per transceiver, no load, TA = 25°C; source page 7 |
| Direction Control | DIR controls A-to-B or B-to-A data transmission; condition: logic level at DIR input determines bus direction; source page 1 |
| Output Enable Function | OE disables device to isolate buses; condition: output-enable input used for 3-state isolation; source page 1 |
| Datasheet Status | request_only |
Product Overview
SN74HC245NSR is a Texas Instruments octal bus transceiver in the Signal_Chain category. Its function is asynchronous two-way communication between data buses using 3-state outputs. The DIR input selects A-to-B or B-to-A data transmission, and the OE input disables the device for bus isolation when the outputs must be placed in the off state.
The device operates from a recommended 2 V to 6 V supply range, with 5 V identified as a nominal supply condition. Recommended input and output voltage ranges are 0 V to VCC, and the specified operating free-air temperature range for SN74HC245 is -40°C to 85°C. Logic thresholds scale with VCC, including VIH minimums of 1.5 V at 2 V, 3.15 V at 4.5 V, and 4.2 V at 6 V.
For assembly planning, this ordering entry uses the NS package, described as SO/SOP with 20 pins and a 12.60 mm × 5.30 mm nominal body. Electrical limits include ±35 mA continuous output current and ±70 mA continuous current through VCC or GND under absolute maximum ratings.
Key Features
- Octal bus transceiver with 3-state outputs
- Asynchronous two-way communication between data buses
- DIR selects A-to-B or B-to-A transmission
- OE disables outputs to isolate buses
- Recommended 2 V to 6 V supply operation
- Input and output ranges from 0 V to VCC
- -40°C to 85°C operating free-air temperature
- Max 80 µA supply current at 6 V
- Typ 15 ns propagation delay at 4.5 V, 50 pF
- NS SO/SOP 20 package, 12.60 mm × 5.30 mm body
Typical Applications
- Asynchronous data bus communication
- Bidirectional bus transceiver stages
- A-to-B bus direction control
- B-to-A bus direction control
- 3-state bus isolation
- 5 V digital bus interfaces
- 2 V to 6 V logic systems
Procurement Notes
When requesting a quote for SN74HC245NSR, 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 function does the SN74HC245NSR provide?
SN74HC245NSR is an octal bus transceiver with 3-state outputs. It supports asynchronous two-way communication between data buses, with DIR controlling the transmission direction and OE disabling the outputs to isolate the buses.
What supply voltage range is recommended for SN74HC245NSR?
The recommended operating supply voltage range is 2 V to 6 V. The extracted datasheet facts also list 5 V as a nominal supply voltage condition for this Texas Instruments SN74HC245 device.
What package is used for this ordering entry?
SN74HC245NSR uses the NS package case, described as SO/SOP with 20 pins and a 12.60 mm × 5.30 mm nominal body. This package information comes from the extracted product facts.
What timing data is specified at 4.5 V and 50 pF?
At VCC = 4.5 V and CL = 50 pF, propagation delay is typ 15 ns and max 26 ns. Output enable time is typ 23 ns and max 58 ns, while output disable time is typ 25 ns and max 50 ns.
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.