SN74ACT245DWE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74ACT245DWE4 is an octal bidirectional bus transceiver with 3-state outputs by Texas Instruments in the ACT logic family, housed in a 20-pin wide SOIC package. Key specs: 8-bit bidirectional data transfer with direction control, 24mA output sink current, operates from 5V supply. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ACT245DWE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal (8-bit) bidirectional bus transceiver with direction and output enable control
- ACT logic family providing TTL-compatible inputs with CMOS speed and output drive
- 24mA output sink current (I(ol)) for driving heavily loaded bus lines
- 3-state outputs allow bus isolation and multiple device sharing on common data buses
- 20-pin wide SOIC (SOP) package with RoHS-compliant lead-free finish
Applications
The SN74ACT245DWE4 is widely used in microprocessor bus interfaces, memory systems, and backplane communication where bidirectional 8-bit data transfer with isolation capability is needed. Its high drive current and 3-state outputs make it ideal for CPU-to-peripheral data buses, FPGA I/O expansion, and industrial communication interfaces requiring buffered bidirectional signal routing.
Specifications
| YTEOL | 0 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | ACT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| 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) | 260 |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 9ns |
| Propagation Delay (tpd) | 9ns |
| 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 | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ACT245DWE4:
Frequently Asked Questions
How does the direction control work on the SN74ACT245DWE4?
The SN74ACT245DWE4 uses a dedicated direction control (DIR) pin that determines the signal flow direction. When DIR is high, data flows from the B port to the A port; when DIR is low, data flows from A to B. An active-low output enable (OE) pin places all outputs in a high-impedance state for bus isolation.
What is the output drive current of the SN74ACT245DWE4?
The SN74ACT245DWE4 provides a maximum output sink current (I(ol)) of 24mA per output, which is significantly higher than standard CMOS devices. This high drive strength makes it suitable for driving long PCB traces, multiple parallel loads, or heavily capacitive bus lines at full ACT logic speed.
What package is the SN74ACT245DWE4 available in?
The SN74ACT245DWE4 is available in a 20-pin wide-body Small Outline Package (SOIC/DW) with JESD-30 code R-PDSO-G20. The E4 suffix indicates a lead-free, RoHS-compliant device per JESD-609 code e4. This surface-mount package is suitable for high-density PCB designs with automated assembly.
Is the SN74ACT245DWE4 compatible with 3.3V logic systems?
The SN74ACT245DWE4 is an ACT-family device designed to operate from a 5V supply with TTL-compatible input thresholds. While its output voltage levels are suited to 5V TTL/CMOS systems, it can accept 3.3V logic inputs due to its TTL input thresholds. For fully 3.3V operation, Texas Instruments offers LVTH245 and other lower-voltage transceiver alternatives.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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