SN74HCT245DW Texas Instruments logic-ics (SOIC-Wide) In Stock
SN74HCT245DW is a TI octal bus transceiver (HCT logic) in 20-pin SOIC-Wide package, 4.5–5.5V supply, -40°C to +85°C. From $0.16, in stock, ships worldwide, 1 pc MOQ.
- Manufacturer
- Texas Instruments
- Package
- SOIC-Wide
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HCT245DW Datasheet PDF
- Category
- logic-ics
- Price
- From $0.1600(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit bidirectional bus transceiver with direction control pin (DIR) and output-enable (OE)
- HCT logic family: TTL-compatible inputs, CMOS-speed outputs, 5V supply
- 3-state outputs for high-impedance bus sharing in multi-master systems
- 20-pin SOIC-Wide (DW) package for easy PCB soldering and high-volume assembly
- Operating range -40°C to +85°C, RoHS compliant, active production status
Applications
SN74HCT245DW is widely used in microprocessor data bus buffering, memory address/data bus isolation, and level translation between TTL and CMOS logic systems. Common applications include industrial controllers, test and measurement equipment, embedded systems backplanes, and communication interface boards requiring bidirectional 8-bit bus driving.
Specifications
| Supply Voltage | 4.5–5.5V |
| Logic Family | HCT |
| Number of Bits | 8 |
| Propagation Delay (typ) | 10ns |
| Output Current (IOH/IOL) | ±25mA |
| Operating Temperature | -40 to +85°C |
| Package | SOIC-Wide (DW) |
| Pin Count | 20 |
| Input Type | TTL-compatible |
| Output Type | 3-State |
| Package | SOIC-Wide |
Compliance & Regulatory
| RoHS Status | Compliant |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HCT245DW:
CMOS (non-TTL-input) variant of the same octal transceiver; suitable when both bus sides operate at 3.3–5V CMOS logic levels
Advanced HCT version with faster propagation delay and higher drive strength; pin-compatible upgrade for high-speed bus applications
Frequently Asked Questions
What is the SN74HCT245DW and what does it do?
The SN74HCT245DW is an 8-bit (octal) bidirectional bus transceiver from Texas Instruments, part of the HCT (High-speed CMOS TTL-compatible) logic family. It buffers and drives data in both directions on an 8-bit bus using a direction control pin (DIR) and an output-enable pin (OE̅). Its 3-state outputs allow multiple devices to share the same bus without contention, making it essential for data bus buffering in microprocessor systems.
What are the key electrical specifications of the SN74HCT245DW?
Key specifications: supply voltage 4.5V–5.5V (5V nominal), TTL-compatible input thresholds (V_IH ≥ 2.0V, V_IL ≤ 0.8V), 3-state CMOS outputs, typical propagation delay ~10 ns, output drive capability ±25 mA, operating temperature -40°C to +85°C (industrial grade). The DW suffix denotes the 20-pin SOIC-Wide (7.5 mm body) package.
What package is the SN74HCT245DW and how does it compare to other variants?
The DW suffix indicates a 20-pin SOIC-Wide package (7.5 mm body width, 1.27 mm pitch). TI also offers the SN74HCT245N (20-pin PDIP), SN74HCT245PW (20-pin TSSOP), and SN74HCT245RGYR (QFN). The SOIC-Wide is popular for hand soldering and rework. All variants share the same silicon and electrical specs; only footprint differs.
What are common pin-compatible alternatives or drop-in replacements?
Direct functional equivalents include the 74HCT245 from Nexperia (74HCT245D,652), ON Semiconductor (MC74HCT245ADW), and STMicroelectronics (M74HCT245DW1R). The non-TTL-compatible 74HC245 (SN74HC245DW) is a close substitute when both sides run at 3.3V–5V CMOS levels. For higher drive strength, consider the SN74AHCT245DW (advanced HCT with faster switching).
Is the SN74HCT245DW RoHS compliant and still in production?
Yes. The SN74HCT245DW is RoHS compliant (lead-free, halogen-free option available as SN74HCT245DWG4), currently in active production at Texas Instruments, and not subject to any end-of-life notice. It is stocked by major distributors globally and available from FindMyChip with 1-piece MOQ from $0.16/pc with quantity breaks starting at 26 pieces.
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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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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.2000 | $0.20 |
| 26+ | $0.1600 | $4.16 |
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