M74HCT573M1R STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
STMicroelectronics M74HCT573M1R is an octal D-type transparent latch in HCT logic family with active-low output enable, supporting 150 pF load capacitance and 20-pin SOIC package. Compatible with TTL input levels and 5 V CMOS logic for seamless bus interfacing. Available from global distributors in tape-and-reel format for automated SMT assembly.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- M74HCT573M1R Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- HCT logic family provides TTL-compatible input thresholds at 5 V CMOS supply for direct interface with legacy TTL systems
- Active-low output enable (OE) allows bus isolation, making it ideal for tri-state data bus architectures
- Supports 150 pF load capacitance per output, enabling robust drive of capacitive bus lines without external buffers
- 20-pin SOIC package (R-PDSO-G20) balances compact footprint with easy hand-soldering and automated pick-and-place assembly
Applications
The M74HCT573M1R is commonly used in microprocessor address and data bus demultiplexing where 8-bit parallel data needs to be latched and held stable during bus cycles. It is well suited for FPGA and CPLD peripheral interfacing, memory address latching in SRAM and Flash designs, and industrial control panel data capture where TTL-to-CMOS level bridging is required. Its unidirectional octal latch structure also fits LED display driver data hold applications.
Specifications
| YTEOL | 0 |
| Additional Feature | BROADSIDE VERSION OF 373 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | HCT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 150pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.006A |
| 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 |
| Power Supply Current-Max (ICC) | 70mA |
| Prop. Delay@Nom-Sup | 45ns |
| Propagation Delay (tpd) | 59ns |
| 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 | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the M74HCT573M1R differ from the 74HCT373 in pin layout and which designs prefer the 573?
The M74HCT573M1R is the broadside version of the 74HCT373, meaning inputs and outputs are arranged on opposite sides of the 20-pin SOIC package rather than intermixed. This layout simplifies PCB routing for 8-bit data bus lines, as all 8 data inputs on one side connect directly to a parallel bus without crossing traces. Designers working on memory address latching or microprocessor bus interfaces often prefer the 573 pinout for cleaner board layout.
What output drive capability does the M74HCT573M1R provide when driving 150 pF capacitive loads?
The M74HCT573M1R is specified to drive loads up to 150 pF per output while maintaining valid logic levels. Each output can sink up to 6 mA (I_OL = 6 mA) at the TTL low level. This drive strength is sufficient for most backplane bus segments and short PCB traces without additional buffer stages, making it suitable for data bus expansion in embedded systems operating at 5 V.
Can M74HCT573M1R be used alongside 3.3 V logic devices in a mixed-voltage system?
The M74HCT573M1R is a 5 V supply device with TTL-compatible input thresholds, meaning it accepts V_IH as low as 2 V. This allows 3.3 V CMOS logic outputs to directly drive its inputs without level-shift circuitry in most cases. However, the device outputs swing to the full 5 V rail, so any 3.3 V logic receiving M74HCT573M1R outputs must be 5 V tolerant to avoid damage.
What packaging and tape-and-reel options are available for M74HCT573M1R in volume production?
The M74HCT573M1R is offered in a 20-pin SOIC package (JEDEC R-PDSO-G20) with the M1R suffix indicating tape-and-reel delivery in quantities suitable for automated SMT lines. The device complies with the e4 JEDEC moisture sensitivity code and is RoHS-compliant per the e4 JESD-609 classification. Lead-free finish supports standard 260°C peak reflow profiles.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”