SN74HCT245DWRIn StockTexas Instruments
SN74HCT245DWR is an octal bus transceiver with 3-state outputs, supporting bidirectional data transfer up to 25 MHz with HCT logic levels. Features 8-bit bus interface, common direction control, and 3-state outputs for easy bus sharing. From $0.1942, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HCT245DWR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1942(MOQ 9)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal bidirectional bus transceiver with 3-state outputs for high-impedance bus sharing
- HCT logic family compatible with TTL input levels and CMOS output levels
- High-speed operation up to 25 MHz with 150 pF load capacitance
- Common direction control pin simplifies bus interface design
- Available in compact 20-pin SOIC (DWR) package for space-efficient PCB layouts
Applications
The SN74HCT245DWR is widely used in microprocessor and microcontroller bus interface circuits, enabling bidirectional data transfer between different voltage domains or isolated bus segments. It is commonly found in memory expansion boards, industrial control systems, and communication equipment where TTL-to-CMOS level translation and bus buffering are required. The device is also used in test and measurement equipment, PLC systems, and embedded designs requiring robust 8-bit parallel data bus management.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | HCT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 150pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.006A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| 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 | TR, 13 INCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 28ns |
| Propagation Delay (tpd) | 38ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| 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 (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## SN74HCT245DWR Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia, Taiwan |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HCT245DWR:
Frequently Asked Questions
What is the maximum operating frequency of the SN74HCT245DWR?
The SN74HCT245DWR supports high-speed operation and is specified with a load capacitance (CL) of 150 pF. The HCT family typically operates at frequencies up to 25 MHz, making it suitable for fast bus interface applications in microprocessor and communication systems.
What logic family does the SN74HCT245DWR belong to, and what are the voltage compatibility characteristics?
The SN74HCT245DWR belongs to the HCT (High-speed CMOS with TTL-compatible inputs) logic family. It accepts standard TTL input voltage levels (VIH = 2.0 V, VIL = 0.8 V) while providing CMOS output levels, making it ideal for interfacing TTL-based microprocessors with CMOS peripherals on a 5 V supply.
What package is the SN74HCT245DWR available in, and what does the 'DWR' suffix indicate?
The 'DWR' suffix indicates a 20-pin wide-body Small Outline Integrated Circuit (SOIC) package (JEDEC R-PDSO-G20). This surface-mount package has a 7.5 mm body width and 1.27 mm pin pitch, suitable for automated PCB assembly. The part is RoHS-compliant (Pb-free, JESD-609 code e4).
Can the SN74HCT245DWR be used as a replacement for the SN74ABT245 or SN74LS245?
The SN74HCT245DWR is pin-compatible with SN74LS245 and shares the same 8-bit bidirectional bus transceiver function with 3-state outputs. However, the HCT family has different speed and drive characteristics compared to ABT or LS families. Always verify voltage levels, propagation delay, and output drive current (max IOL = 6 mA) before substitution in a design.
What is the typical application for the SN74HCT245DWR?
The SN74HCT245DWR is typically used as a bus buffer and level translator in microprocessor systems, memory interfaces, industrial PLCs, and communication equipment. Its bidirectional capability and 3-state outputs allow multiple devices to share a common 8-bit data bus, while the common direction control pin simplifies bus arbitration logic.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 9+ | $0.5625 | $5.06 |
| 37+ | $0.3656 | $13.53 |
| 112+ | $0.2601 | $29.13 |
| 138+ | $0.2109 | $29.10 |
| 835+ | $0.1942 | $162.16 |
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