CD74HC573EG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments CD74HC573EG4 is an octal D-type transparent latch with 3-state outputs in the HC CMOS logic family, featuring eight independent D latches controlled by a common latch-enable and output-enable signal, operating from 2 V to 6 V in a 20-pin DIP package. It is used for address and data bus buffering, microprocessor port expansion, and industrial control interfacing.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC573EG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3854(MOQ 980)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC573EG4?
- 8-bit transparent D-type latch with 3-state outputs for bus isolation and multiplexing
- Wide supply voltage range of 2 V to 6 V, compatible with 3.3 V and 5 V logic systems
- Common output-enable (OE) and latch-enable (LE) pins for simplified bus control logic
- HC CMOS process delivers low quiescent current and TTL-compatible input thresholds
- 20-pin DIP package suitable for breadboard prototyping, through-hole production, and socketed designs
- Propagation delay typically 15 ns at 5 V supply for high-speed bus applications
- RoHS-compliant (E suffix) Pb-free version available for regulated-market designs
What is CD74HC573EG4 used for?
CD74HC573EG4 is commonly used as an address latch between a microprocessor and external memory or I/O peripherals, capturing the lower address byte on the ALE pulse before the bus transitions to data mode. Its 3-state outputs and wide supply range also make it practical for logic-level translation bridging between 3.3 V and 5 V bus segments in industrial and educational electronics prototypes.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the CD74HC573EG4 datasheet?
CD74HC573EG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC573EG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does CD74HC573EG4 differ from CD74HC373 in a microprocessor address-latch circuit?
Both parts are 8-bit D-type latches, but CD74HC573 uses non-inverting outputs with an active-high latch enable, while CD74HC373 has the same function with a different pinout that places all data inputs on one side of the package and outputs on the other. CD74HC573's pinout is preferred for cleaner PCB routing in bus-oriented designs where inputs arrive from one direction and outputs drive the address bus in the other direction.
What supply voltage range does CD74HC573EG4 support, and can it directly interface 3.3 V MCU GPIO outputs?
CD74HC573EG4 operates from 2 V to 6 V, covering both 3.3 V and 5 V system rails. A 3.3 V MCU GPIO driving the latch-enable or data inputs at logic-high (VOH ≥ 2.4 V) meets the HC CMOS VIH threshold at 3.3 V supply, enabling direct interfacing without level-shifting resistors in most design scenarios.
What is the propagation delay of CD74HC573EG4, and is it fast enough for 8-bit bus demultiplexing at typical MCU bus speeds?
CD74HC573EG4 has a typical propagation delay of approximately 15 ns at 5 V supply. Most 8-bit microcontrollers multiplex address and data at frequencies below 20 MHz, giving a half-period of 25 ns or more. The 15 ns latch delay fits within this window, making CD74HC573 suitable for address latching without adding wait states to the bus cycle.
What are the advantages of the 20-pin DIP package for prototyping and low-volume production compared to SOIC alternatives?
The 20-pin DIP package has a 2.54 mm pin pitch allowing direct insertion into standard 0.1-inch breadboards and solder-cup IC sockets. This eliminates soldering during prototyping, simplifies field replacement, and reduces rework cost in low-volume industrial products. For higher-volume or space-constrained boards, the SOIC-20 variant of the same logic function offers a smaller 7.5 mm body footprint.
Is CD74HC573EG4 RoHS compliant, and does the G4 suffix indicate any special qualification?
Yes. The E in the part number indicates a Pb-free, RoHS-compliant solder finish, and the G4 suffix denotes the tape-and-reel packaging variant using a 7-inch reel with 13-inch host reel for automated assembly. Standard operating temperature range is -40°C to +85°C, covering industrial applications without additional screening.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 980+ | $0.3854 | $377.73 |
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