SN74BCT374DWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74BCT374DWG4 is an octal D-type bus interface flip-flop from Texas Instruments with 3-state outputs operating at 5V in a 20-pin SOIC package. It supports 70MHz maximum clock frequency with active-low output enable for high-speed data bus latching. Suitable for TTL and CMOS bus interface applications in industrial, computing, and communications equipment.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74BCT374DWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74BCT374DWG4?
- 70MHz maximum clock frequency with BCT logic family enables high-speed 8-bit data bus latching in processor and memory interface designs
- 3-state outputs with active-low enable allow multiple devices to share a common 8-bit bus without contention at 5V logic levels
- 50pF characterized load capacitance ensures signal integrity specification compliance for standard PCB bus trace lengths
- 20-pin SOIC wide-body package provides a robust, easy-to-solder footprint for production board assembly
What is SN74BCT374DWG4 used for?
SN74BCT374DWG4 is deployed in microprocessor bus interfaces, memory address latches, and high-speed digital backplane designs requiring octal 8-bit data storage with tri-state bus control. Its 70MHz clock capability and BCT logic family make it suitable for PCI bus drivers, FPGA I/O expansion, and VMEbus interface cards. The device is also used in industrial PLCs and communications line cards where reliable 5V TTL data latching with output enable control is essential.
What are the specifications of SN74BCT374DWG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | BCT/FBT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max Frequency@Nom-Sup | 70000000Hz |
| Max I(ol) | 0.064A |
| 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) | 60mA |
| Prop. Delay@Nom-Sup | 10.6ns |
| Propagation Delay (tpd) | 10.6ns |
| 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 | BICMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| 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 |
Where can I find the SN74BCT374DWG4 datasheet?
SN74BCT374DWG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74BCT374DWG4?
Compatible alternatives and drop-in replacements for SN74BCT374DWG4:
Frequently Asked Questions
How does SN74BCT374DWG4's 70MHz clock rate support fast processor bus interfaces compared to standard HCT flip-flops?
At 70MHz maximum clock frequency, SN74BCT374DWG4 operates more than 5x faster than typical 13MHz HCT flip-flops, making it suitable for latching address and data buses in 486 and early Pentium-era microprocessor designs or modern FPGA I/O buffers. The BCT logic family combines BiCMOS drive strength with low propagation delay, ensuring setup and hold times are met even when the 8-bit data bus is switching simultaneously across all 8 channels at full bus speed.
In a shared 8-bit data bus design, how does the active-low output enable of SN74BCT374DWG4 prevent bus contention?
The active-low output enable of SN74BCT374DWG4 places all 8 output lines into high-impedance state when driven high, allowing other bus devices to drive the same 8 wires without electrical conflict. In a typical microcontroller bus with 4 peripheral nodes each using a BCT374 latch, only one device's enable pin is pulled low at any time, while the remaining 3 hold their outputs at 50pF-characterized high-Z. This scheme eliminates bus contention at up to 70MHz without external bus arbitration ICs.
How does SN74BCT374DWG4 compare to SN74LVTH374 when designing a 3.3V-to-5V bus interface?
SN74BCT374DWG4 is a 5V-only device with BCT-level output drive, while SN74LVTH374 operates at 3.3V supply with 5V-tolerant inputs designed explicitly for mixed-voltage bus interfaces. If the goal is translating between 3.3V CMOS logic and a 5V TTL bus, SN74LVTH374 is the correct choice. SN74BCT374DWG4 is better suited for pure 5V systems needing maximum 70MHz speed and strong output drive without level translation, such as legacy backplane cards and industrial 5V bus segments.
For a VMEbus card requiring 8-bit data latches with strong output drive, how many SN74BCT374DWG4 devices are needed for a 32-bit bus?
Each SN74BCT374DWG4 latches 8 bits with 3-state output enable, so a 32-bit VMEbus data path requires 4 devices — one per byte lane — each handling 8 data lines. With 70MHz clock support and BCT output drive rated for 50pF loads, the 4 devices collectively buffer all 32 data bits at full VMEbus transfer speeds. The 20-pin SOIC package keeps PCB real estate manageable, occupying approximately 12.8mm x 7.5mm per device when placed in a standard SOIC-20 footprint.
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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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