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STMicroelectronics 74LVC573AMTR
- Part No.:
- 74LVC573AMTR
- Manufacturer:
- STMicroelectronics
- Category:
- Latches
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVC573AMTR.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:909
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Product details
Overview
74LVC573AMTR from STMicroelectronics is an octal D-type transparent latch with 3-state outputs, designed for 1.65V–3.6V operation in low-power digital systems. It features latch enable (LE) and output enable (OE) controls, symmetrical ±24mA drive at 3V, 6.8ns max propagation delay, and 5V-tolerant inputs - enabling direct interfacing between 3.3V logic and legacy 5V TTL/NMOS buses.
For engineers reviewing the 74LVC573AMTR datasheet, 74LVC573AMTR pinout, 74LVC573AMTR application, or 74LVC573AMTR equivalent, key selection criteria include its 8-bit latch function with independent OE/LE control, high-speed 3.3V performance exceeding 74AC/ACT families, PCI-bus-level drive capability, and robust ESD immunity (>2kV HBM).
Technical Context
The 74LVC573A implements a transparent latch architecture where Q outputs follow D inputs when LE is HIGH, and hold the last D value when LE transitions LOW. Output state is further controlled by OE: LOW enables normal logic outputs; HIGH places all eight Q pins in high-impedance mode.
It operates across 1.65V–3.6V VCC with data retention down to 1.2V, supports 5V-tolerant inputs regardless of supply voltage, and delivers balanced tPLH ≅ tPHL propagation delays. Its C2MOS process ensures latch-up immunity >500mA and static protection compliant with MIL-STD-883 method 3015.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables interoperability across 1.8V, 2.5V, and 3.3V logic domains |
| tPD (max) | 6.8ns at VCC = 3.0V - supports >100MHz bus timing in transparent-latch mode |
| IOL / IOH | ±24mA at VCC = 3.0–3.6V - drives PCI-compliant loads without external buffers |
| Input Tolerance | 5V tolerant - allows mixed-voltage system interfacing without level shifters |
| IOZ Leakage | ±5µA at VCC = 3.6V - ensures minimal current draw in 3-state standby |
| Power Dissipation | CPD = 34pF at 3.3V - predicts ~1.1mW/MHz dynamic power at typical load |
| ESD Rating | HBM > 2000V - meets industrial-grade handling requirements without special precautions |
Pinout & Package
TSSOP-20 package: 6.5mm × 4.4mm body, 0.65mm pitch, lead-free, RoHS-compliant surface-mount outline per JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Drives all Q0–Q7 into high-Z when HIGH; enables normal logic output when LOW |
| 2–9 (D0–D7) | Data inputs | Accept 5V-tolerant signals; feed latch input stage during LE = HIGH |
| 11 (LE) | Latch enable | Transparent pass-through when HIGH; captures and holds D-input state on falling edge |
| 12–19 (Q0–Q7) | 3-state latch outputs | Drive bidirectional buses; sink/source up to 24mA with matched impedance |
| 10 (GND) | Ground reference | Return path for all I/O and supply currents; must be low-inductance connection |
| 20 (VCC) | Positive supply | Primary power rail; decoupling capacitor required within 5mm for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement | Direct drop-in for 74LS573 and 74HC573 in 3.3V systems with no layout change |
| Power-down protection | Inputs and outputs remain high-Z and non-destructive when VCC = 0V |
| Symmetrical drive strength | |IOH| = IOL = 24mA min at 3V - eliminates skew in bus termination design |
| Balanced propagation delays | tPLH ≅ tPHL - minimizes setup/hold window violations in synchronous latch applications |
| Low dynamic noise | VOLP = 0.8V, VOLV = −0.8V at CL = 50pF - reduces simultaneous switching noise on shared VCC/GND |
Applications
| Industrial PLC Backplane Interface | Embedded Microcontroller Data Bus Latching |
|---|---|
|
Use Scenario: Isolating microcontroller address/data bus from noisy industrial I/O modules using shared parallel backplane. IC Role / Device Role / Timing Role: Octal latch buffers address strobes and data writes; LE synchronized to CPU WR# signal, OE tied LOW for active driving. Use Value: 5V-tolerant D inputs accept legacy module signals; ±24mA drive ensures clean edges across 15cm PCB traces at 10MHz. |
Use Scenario: Expanding GPIO count on resource-constrained ARM Cortex-M0+ MCU via multiplexed address/data bus. IC Role / Device Role / Timing Role: Latches lower 8 bits of parallel interface during memory-mapped peripheral access; LE driven by ALE signal. Use Value: 6.8ns tPD enables sub-100ns bus cycle times; 1.65V min VCC supports ultra-low-power sleep modes with data retention. |
| PCI Local Bus Signal Conditioning | Test Equipment Digital Pattern Generator |
|
Use Scenario: Driving PCI bus segments requiring 24mA drive compliance and 5V signaling compatibility. IC Role / Device Role / Timing Role: Acts as bi-directional data latch between 3.3V controller and 5V PCI slot; OE managed by bus arbitration logic. Use Value: Guaranteed PCI bus levels at 24mA; 5V-tolerant inputs eliminate level-shifter ICs and reduce BOM cost by 30%. |
Use Scenario: Generating repeatable 8-bit digital stimulus waveforms in automated test fixtures. IC Role / Device Role / Timing Role: Stores pattern bytes from FPGA sequencer; LE triggered by clock edge, OE pulsed for precise output timing. Use Value: Matched tPLH/tPHL (<1ns skew) ensures deterministic edge alignment across all 8 channels; low CIN (4pF) preserves fast rise times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC573APWR (TI) | Identical electrical specs; different TSSOP-20 footprint (JEDEC MO-153 vs TI's own variant), slightly higher ICC (12µA vs 10µA) | Same functional behavior; requires PCB land pattern verification for solder joint reliability | Preferred for TI-centric BOMs; validated for automotive temp range (−40°C to 125°C) |
| 74ALVC573PW,118 (Nexperia) | Lower CPD (24pF vs 34pF); identical VCC range and drive strength; 1.5ns faster tPD (5.3ns max at 3V) | Enables marginally higher bus frequencies; same pinout but tighter AC timing margins | Optimal for high-density, low-power designs where dynamic power reduction >15% is critical |
Compared with SN74LVC573APWR, the 74LVC573AMTR offers lower quiescent current and ST's extended industrial qualification; versus 74ALVC573PW, it trades 1.5ns speed for broader voltage-margin stability and proven field reliability in motor-control environments.
Availability
74LVC573AMTR is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller bus expansion, and PCI signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 74LVC573AMTR 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.
The 74LVC family targets low-voltage, high-speed logic interfacing in mixed-signal embedded systems - emphasizing 5V tolerance, sub-2V operation, and robustness in electrically noisy environments.
FAQ
Can 74LVC573AMTR operate reliably at 1.65V VCC with full timing guarantees?
Yes. All AC and DC specifications - including tPD ≤ 8.2ns, VIH ≥ 0.65×VCC, and IOL ≥ ±4mA - are fully guaranteed across 1.65V–3.6V per the datasheet's Recommended Operating Conditions table. At 1.65V, it delivers deterministic latching with 4mA drive, making it suitable for ultra-low-power battery-backed applications.
Is the 74LVC573AMTR pinout compatible with standard SO-20 footprints?
No. The "MTR" suffix denotes TSSOP-20 packaging (6.5mm × 4.4mm, 0.65mm pitch), which is physically incompatible with SO-20 (12.8mm × 7.6mm, 1.27mm pitch). Board layout must use the TSSOP-20 land pattern per ST's PO13L mechanical drawing; no adapter or socket is recommended due to signal integrity risks.
What happens to outputs when VCC = 0V and OE/LE are driven externally?
Outputs enter high-impedance state with <5µA off-state leakage (Ioff), and inputs exhibit power-down protection - preventing back-driving or latch-up even if 5V signals are applied. This allows hot-plug capability and safe operation during power sequencing, as confirmed by absolute maximum ratings and Ioff test data.
Does 74LVC573AMTR support true bidirectional data flow like a transceiver?
No. It is a unidirectional octal latch: data flows only from D inputs to Q outputs. While OE enables/disables Q drivers, there is no internal path from Q to D, nor any receiver circuitry. For bidirectional bus interfaces, external direction control logic or dedicated transceivers (e.g., 74LVC245) must be used alongside this device.
74LVC573AMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LVC
- 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:
- 1.65V ~ 3.6V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 1ns
- Current - Output High, Low:
- 24mA, 24mA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74LVC573AMTR FAQ
1.How can I place an order for 74LVC573AMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC573AMTR 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 74LVC573AMTR reliable?
The price and inventory of 74LVC573AMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC573AMTR is usually 5 days.
3.What payment methods are accepted for 74LVC573AMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC573AMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC573AMTR?
74LVC573AMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC573AMTR 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 74LVC573AMTR?
For technical support, including 74LVC573AMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC573AMTR requirements.
6.How does Aetrix verify that 74LVC573AMTR is sourced from the original manufacturer or authorized distributors?
All 74LVC573AMTR 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 74LVC573AMTR meets industry standards.
7.What is the process for return or replacement of 74LVC573AMTR?
All 74LVC573AMTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC573AMTR, 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 74LVC573AMTR part is unused and in its original packaging.
Return procedure for 74LVC573AMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC573AMTR 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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