SN74AHC573DWR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SN74AHC573DWR is an octal transparent D-type latch with 3-state outputs from the AHC/VHC family, featuring active-low output enable and 8mA output drive with 50pF load capacitance. It provides unidirectional 8-bit data latching in a 20-Pin SOIC package. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74AHC573DWR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal transparent D-type latch with 3-state outputs for bus-friendly data capture and tristate bus sharing
- Active-low output enable (OE) control for easy bus multiplexing and high-impedance state management
- AHC/VHC/H/U/V family providing low-power high-speed operation compatible with modern CMOS logic systems
- RoHS compliant Pb-free construction with JEDEC-609 e4 certification for lead-free manufacturing processes
Applications
The SN74AHC573DWR octal latch is widely used as a data bus latch and output port register in microprocessor, microcontroller, and FPGA designs requiring 8-bit transparent data capture with tristate output control. Its 3-state outputs enable efficient bus sharing where multiple devices must drive a common data bus, making it suitable for memory address latching, I/O port expansion, and multiplexed bus interfaces in embedded systems. The device is also commonly deployed in industrial control, communications equipment, and test instrumentation where synchronized parallel data storage with bus isolation is required.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AHC/VHC/H/U/V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| 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) | 0.04mA |
| Prop. Delay@Nom-Sup | 12ns |
| Propagation Delay (tpd) | 19ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| 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 |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74AHC573DWR:
suggested
suggested
Bus Driver, AHC/VHC/H/U/V Series, 8-Func, 8-Bit, True Output, CMOS, PDSO20
Bus Driver, AHC/VHC/H/U/V Series, 8-Func, 8-Bit, True Output, CMOS, PDSO20
Bus Driver, AHC/VHC/H/U/V Series, 8-Func, 8-Bit, True Output, CMOS, PDSO20
Bus Driver, AHC/VHC/H/U/V Series, 8-Func, 8-Bit, True Output, CMOS, PDSO20
Frequently Asked Questions
What is the SN74AHC573DWR and how does a transparent latch differ from a flip-flop?
The SN74AHC573DWR is an octal transparent D-type latch with 3-state outputs from Texas Instruments' AHC/VHC logic family. Unlike edge-triggered flip-flops, a transparent latch passes data from input to output while the latch enable (LE) is high, and holds the last input state when LE goes low. This transparent mode makes it ideal for bus data capture and address latching in microprocessor systems.
What does 3-state output mean on the SN74AHC573DWR and how is it controlled?
The SN74AHC573DWR's 3-state (tristate) outputs can be placed in a high-impedance state using the active-low output enable (OE) pin. When OE is high, all eight outputs are disconnected from the bus, allowing other devices to drive the same bus lines. This feature is essential for bus-sharing architectures in microcontroller data buses, memory interfaces, and multiplexed I/O systems.
What is the output current capability and load rating of the SN74AHC573DWR?
The SN74AHC573DWR provides a maximum low-level output current (IOL) of 8mA with a rated load capacitance of 50pF. These specifications are appropriate for standard CMOS logic bus driving, ensuring reliable signal levels when connecting to multiple logic inputs on typical PCB trace lengths in embedded and digital interface designs.
What package does the SN74AHC573DWR use and is it RoHS compliant?
The SN74AHC573DWR comes in a 20-Pin SOIC (Small Outline IC) package with JEDEC-30 code R-PDSO-G20. It is fully RoHS compliant with a Pb-free designation and JEDEC-609 code e4, making it compatible with lead-free solder assembly processes required in modern consumer, industrial, and commercial electronics manufacturing.
What are typical applications for the SN74AHC573DWR?
The SN74AHC573DWR is commonly used as a data bus latch, address register, or I/O port buffer in microprocessor and microcontroller support circuits. Its tristate outputs make it ideal for multiplexed address and data bus systems in memory interfacing applications. The device is also used in industrial automation controllers, embedded system output ports, and communications equipment requiring reliable 8-bit parallel data storage with bus isolation capability.
Related Guides
TPS54160DGQR Selection Guide: How to Choose a 60V Step-Down Buck Converter
Complete selection guide for the TPS54160DGQR 60V/1.5A step-down converter. Compare specs, alternatives, and sourcing options for industrial and automotive designs.
May 20, 2026
LMV932MM Dual Low-Voltage CMOS Op-Amp: Application Design Guide
Complete application design guide for the LMV932MM dual rail-to-rail CMOS op-amp: supply decoupling, RRIO design rules, stability, and recommended circuits for 1.8V–5.5V battery-powered systems.
May 20, 2026
TL084CN Equivalent and Replacements: JFET-Input Quad Op-Amp Comparison Guide
Compare TL084CN with TL074, LF347, and LM324 quad op-amps. Pin-compatible equivalents, key specs, and when to choose each for your analog design.
May 20, 2026
TPS386000RGPR Quad Voltage Supervisor: Selection and Sourcing Guide (2025)
Compare TPS386000RGPR with TPS386040RGPR, TPS3700, and TPS3823 voltage supervisors. Key specs, threshold programming, watchdog options, and sourcing tips.
May 20, 2026
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
OPA875IDGKR
Small Outline Packages
Integrated Circuit
SN74HC595NSR
Small Outline Packages
Integrated Circuit
BQ24702PWG4
Small Outline Packages
Integrated Circuit
MSP430FR5723IRHAT
Quad Flat No-Lead
Integrated Circuit
CD74ACT244M96G4
Small Outline Packages
Integrated Circuit
MSP430FR5736IRGET
Quad Flat No-Lead
Integrated Circuit
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”