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STMicroelectronics 74ACT573MTR
- Part No.:
- 74ACT573MTR
- Manufacturer:
- STMicroelectronics
- Category:
- Latches
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT573MTR.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
74ACT573MTR from STMicroelectronics is an advanced high-speed CMOS octal D-type latch with non-inverting 3-state outputs, designed for bus interface and data latching in TTL/CMOS mixed-signal systems. It features 5 ns typical propagation delay at 5 V, ±24 mA symmetrical output drive, 4.5–5.5 V operating range, and 2 kV ESD immunity. Used in address/data bus isolation in industrial controllers and memory-mapped I/O subsystems.
For engineers reviewing the 74ACT573MTR datasheet, 74ACT573MTR pinout, 74ACT573MTR application, or 74ACT573MTR equivalent, key selection criteria include latch enable timing (1 ns min pulse width), 3-state output disable time (6.5 ns typ), input compatibility with TTL logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and SO-20 package thermal performance under continuous 24 mA sink/source loads.
Technical Context
The 74ACT573 implements dual-control latching via LE (latch enable) and OE (output enable), supporting transparent data flow when LE is high and precise edge-triggered capture on LE low transition. Its C2MOS process ensures latch-up immunity and rail-to-rail output swing across -55°C to +125°C.
All eight D-to-Q paths exhibit balanced tPLH/tPHL delays (≤12 ns max over full temperature range), and outputs maintain 50 Ω transmission line driving capability with symmetrical |IOH| = |IOL| ≥ 24 mA, enabling direct termination without external resistors in high-speed backplane interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| tPD (typ) | 5 ns at VCC = 5 V - enables 100+ MHz bus operation with margin for setup/hold timing closure |
| VCC Range | 4.5 V to 5.5 V - supports industrial-grade 5 V rails with ±10% tolerance |
| IOL / IOH (min) | 24 mA - drives standard 50 Ω transmission lines without external buffers |
| tW (LE min pulse) | 1.0 ns (25°C) - allows high-frequency latching in burst-mode data acquisition |
| ICC (max) | 4 µA at TA = 25°C - ultra-low static power for always-on control logic sections |
| ESD Immunity | 2 kV HBM - protects against handling discharge in automated PCB assembly |
| Operating Temp | -55°C to +125°C - qualified for extended-temperature industrial and automotive under-hood use |
Pinout & Package
74ACT573MTR is housed in a 20-pin SOIC (SO-20) package per mechanical drawing P013L, with 1.27 mm pitch, 12.6–13.0 mm body length, and 10.0–10.65 mm width. Thermal resistance (RθJA) is 90°C/W, suitable for natural convection in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-low 3-state output enable - disables all Q0–Q7 simultaneously into high-Z mode |
| 2–9 | D0–D7 | Data inputs - accept TTL-compatible levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) for mixed-voltage interfacing |
| 11 | LE | Latch enable - transparent when high; captures Dn on falling edge and holds Qn until next LE low |
| 12–19 | Q0–Q7 | Non-inverting 3-state outputs - deliver rail-aligned logic levels with ±24 mA drive strength |
| 10 | GND | Ground reference - must be connected to system 0 V plane with low-inductance path for noise immunity |
| 20 | VCC | Positive supply - requires local 100 nF ceramic decoupling within 5 mm of pin for stable high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Sub-micron C2MOS process | Enables 5 ns propagation delay while maintaining 2 kV HBM ESD robustness and latch-up immunity |
| Symmetrical output impedance | |IOH| = |IOL| ≥ 24 mA ensures matched rise/fall times and minimal signal distortion on controlled-impedance traces |
| Balanced tPLH/tPHL | ≤12 ns max mismatch over full temperature range - eliminates duty-cycle skew in clocked bus systems |
| 50 Ω transmission line drive | Eliminates need for series termination resistors in point-to-point or daisy-chained bus topologies |
| TTL-compatible input thresholds | VIH ≥ 2.0 V / VIL ≤ 0.8 V allows direct connection to legacy 74LS and 74F logic without level shifters |
Applications
| Industrial PLC Backplane Interface | Memory-Mapped I/O Expansion |
|---|---|
|
Use Scenario: Isolating CPU address/data buses from modular I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Octal latch buffers bidirectional data during read/write cycles, synchronized to LE from bus controller. Use Value: 5 ns tPD and 1 ns LE pulse width support 20+ MHz bus clocking; 24 mA drive sustains signal integrity across 15 cm ribbon cables. |
Use Scenario: Expanding GPIO count on microcontroller-based sensor hubs using parallel peripheral interfaces. IC Role / Device Role / Timing Role: Latches configuration registers and status bits from MCU writes, holding values during interrupt service routines. Use Value: Ultra-low 4 µA ICC reduces standby power in battery-backed systems; -55°C to +125°C rating ensures reliability in unventilated enclosures. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Managing multiplexed switch inputs and lamp driver outputs in vehicle body electronics units. IC Role / Device Role / Timing Role: Captures momentary switch states on LE edge and presents stable outputs to microcontroller ADC or PWM peripherals. Use Value: 2 kV ESD protection withstands assembly handling and field electrostatic events; SO-20 package meets AEC-Q200 vibration requirements. |
Use Scenario: Level-shifting and buffering digital stimulus signals between FPGA pattern generators and DUTs in automated test fixtures. IC Role / Device Role / Timing Role: Provides clean, slew-controlled 3-state outputs to prevent bus contention during test vector transitions. Use Value: Matched tPLH/tPHL minimizes timing uncertainty in high-precision measurement windows; 50 Ω drive matches fixture coaxial cabling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT573N | DIP-20 package, higher RθJA (110°C/W), no lead-free option | Prototyping and through-hole PCBs only; unsuitable for reflow-soldered high-density designs | Select when manual assembly or socket-based validation is required |
| 74LCX573MTCX | Lower VCC range (2.0–3.6 V), 3.3 V logic compatible, 7 ns tPD | Targets modern low-voltage embedded systems; not interoperable with 5 V buses | Choose for 3.3 V domains where power efficiency outweighs speed requirements |
Compared with SN74ACT573N and 74LCX573MTCX, the 74ACT573MTR uniquely balances 5 V TTL compatibility, SO-20 surface-mount reliability, and 5 ns speed-making it optimal for industrial bus interfaces requiring drop-in replacement of legacy 74LS573 without redesigning power or layout.
Availability
74ACT573MTR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, memory-mapped I/O expansion, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ACT573MTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets since 1987.
The 74ACT573 belongs to ST's Advanced CMOS Logic (ACT) family, engineered specifically for high-speed, low-power bus interface applications in mixed-voltage systems where TTL compatibility and robust latch timing are critical.
FAQ
What is the minimum recommended VCC bypass capacitance for stable 74ACT573MTR operation?
A minimum 100 nF X7R ceramic capacitor must be placed within 5 mm of the VCC (pin 20) and GND (pin 10) pins. This suppresses high-frequency supply noise generated during simultaneous 24 mA output switching, preventing output oscillation and ensuring tPLH/tPHL timing compliance across temperature.
Can 74ACT573MTR safely drive a 50 Ω load continuously?
Yes-the device is characterized for 50 Ω transmission line driving with IOL/IOH ≥ 24 mA at VCC = 5 V. Continuous DC loading up to 24 mA per output is supported within absolute maximum ratings; however, sustained full-load operation requires board-level thermal design to limit junction temperature below 125°C.
How does the 74ACT573MTR handle input voltages outside the recommended VI range?
Inputs tolerate -0.5 V to VCC + 0.5 V per absolute maximum ratings. Exceeding VIH ≥ 2.0 V or VIL ≤ 0.8 V risks incorrect latching or increased ICC. Input diode current is limited to ±20 mA; sustained violation may cause permanent damage or parametric shift in propagation delay.
Is the 74ACT573MTR pin-compatible with older 74LS573 devices?
Yes-pinout, function, and logic behavior are identical. However, 74ACT573MTR offers faster tPD (5 ns vs. 17 ns), lower ICC (4 µA vs. 24 mA), and higher output drive (24 mA vs. 8 mA), enabling direct replacement in LS-based designs where timing margin or power budget allows.
74ACT573MTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74ACT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 4.5V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 5ns
- Current - Output High, Low:
- 24mA, 24mA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74ACT573MTR FAQ
1.How can I place an order for 74ACT573MTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT573MTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74ACT573MTR reliable?
The price and inventory of 74ACT573MTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT573MTR is usually 5 days.
3.What payment methods are accepted for 74ACT573MTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT573MTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT573MTR?
74ACT573MTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT573MTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74ACT573MTR?
For technical support, including 74ACT573MTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT573MTR requirements.
6.How does Aetrix verify that 74ACT573MTR is sourced from the original manufacturer or authorized distributors?
All 74ACT573MTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74ACT573MTR meets industry standards.
7.What is the process for return or replacement of 74ACT573MTR?
All 74ACT573MTR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT573MTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74ACT573MTR part is unused and in its original packaging.
Return procedure for 74ACT573MTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ACT573MTR Tags
-
SN74HC573APWR
Texas Instruments
-
SN74HC573ADWR
Texas Instruments
-
SN74AHC573PWR
Texas Instruments
-
SN74HCT573DWR
Texas Instruments
-
SN74HC373N
Texas Instruments
-
SN74HC573AN
Texas Instruments
-
74VHC573MTCX
onsemi
-
MC74LCX573DTR2G
onsemi
-
74AUP1G373GW,125
Nexperia USA Inc.
-
SN74LVC1G373DCKR
Texas Instruments
-
SN74LVC1G373DBVR
Texas Instruments
-
NC7SZ373P6X
onsemi
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