SN74LVT574DW I.C Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Octal D-type edge-triggered flip-flop register from the 74LVT logic family operating at 3.3 V supply in a 20-pin SOIC package. Features 3-state outputs and supports mixed 3.3 V/5 V interfacing with 32 mA output drive. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74LVT574DW I.C Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74LVT574DW I.C?
- 8-bit (octal) D-type register with 3-state outputs enabling data bus isolation in 3.3 V digital systems
- 3.3 V LVT logic family with 5 V input-tolerant I/Os for seamless mixed-voltage PCB integration
- 32 mA output drive current supporting direct driving of bus backplanes and capacitive loads up to 150 pF
- 20-pin SOIC package with standard 1.27 mm pitch for automated SMT assembly in high-density PCB designs
What is SN74LVT574DW I.C used for?
The SN74LVT574DW is widely used as an 8-bit data latch on address and data buses in microprocessor systems, FPGA interface boards, and memory expansion circuits operating at 3.3 V. Its 3-state output capability allows multiple registers to share a common bus line without signal contention, making it a standard building block for bus-buffering in industrial controllers and communication equipment. The 5 V-tolerant inputs also facilitate board-level integration between legacy 5 V TTL peripherals and modern 3.3 V logic cores without additional level-translation devices.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SN74LVT574DW I.C datasheet?
SN74LVT574DW I.C Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LVT574DW I.C?
Compatible alternatives and drop-in replacements for SN74LVT574DW I.C:
Frequently Asked Questions
What output drive strength does SN74LVT574DW provide, and how does that support driving long PCB bus traces?
SN74LVT574DW provides 32 mA output drive current on each of its 8 outputs, which is double the 16 mA typical of standard 74HC devices. This drive strength supports terminating bus traces up to 50 ohms characteristic impedance and charging capacitive loads up to 150 pF while maintaining valid output voltage levels at 3.3 V supply, making it suitable for multi-device memory bus and backplane applications.
How does SN74LVT574DW handle 5 V TTL inputs when the supply is 3.3 V, and where is that useful?
The LVT logic family features 5 V-tolerant input pins that accept logic-high signals up to 5.5 V even while the device operates from a 3.3 V rail. This mixed-voltage tolerance eliminates the need for a discrete level shifter when interfacing with 5 V TTL peripherals such as older memory controllers, PLDs, or sensor interfaces in systems transitioning from 5 V to 3.3 V core voltage.
What clocking behavior does SN74LVT574DW use, and how does it differ from a transparent latch like 74LVT373?
SN74LVT574DW uses positive-edge-triggered D flip-flops, so data is captured only on the rising clock edge, providing deterministic setup-and-hold timing suitable for synchronous 3.3 V bus designs at frequencies up to approximately 200 MHz. In contrast, the 74LVT373 transparent latch passes data whenever the latch-enable pin is high, which can introduce glitches during bus contention. The edge-triggered register is preferred for address pipelining and synchronous data capture applications.
For a compact embedded CPU board, how much board space does the SN74LVT574DW 20-pin SOIC package occupy?
The 20-pin SOIC package (SOIC-20) has a typical body length of 12.8 mm, a width of 7.5 mm, and a total footprint including leads of approximately 12.8 mm x 10.3 mm at 1.27 mm pitch. Compared to a 20-pin DIP through-hole package, the SOIC-20 occupies roughly 40% less PCB area and eliminates the need for through-hole drilling, lowering fabrication cost on 4-layer or 6-layer CPU boards.
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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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