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Toshiba Semiconductor and Storage 74VHC573FT
- Part No.:
- 74VHC573FT
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Latches
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74VHC573FT.pdf
- Description:
- IC LATCH OCTAL D-TYPE 20-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,299
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Product details
Overview
74VHC573FT from Toshiba Electronic Devices & Storage Corporation is an advanced high-speed CMOS octal D-type latch with 3-state outputs, fabricated using silicon gate C2MOS technology. It provides 8-bit transparent latching with independent latch enable (LE) and output enable (OE) controls, operates from 2.0 V to 5.5 V, achieves 4.5 ns typical propagation delay at 5.0 V, and supports automotive-grade temperature range (–40 °C to +125 °C). It is used in bus interface and data buffering applications in industrial control and automotive electronics.
For engineers reviewing the 74VHC573FT datasheet, 74VHC573FT pinout, 74VHC573FT application, or 74VHC573FT equivalent, this page delivers verified technical context, AEC-Q100-compliant operating parameters, TSSOP20B package details, real-world use scenarios, and validated alternative options for system-level design and supply continuity planning.
Technical Context
The 74VHC573FT implements a dual-control latching architecture: data on the eight D inputs is captured on the falling edge of LE, while OE independently places all Q outputs into high-impedance state when asserted high. Its input protection circuit allows safe interfacing between 3 V and 5 V systems, including battery-backup configurations, without external level shifters.
Designed for low-noise, high-immunity operation, it features balanced tPLH/tPHL propagation delays, 28% VCC minimum noise margins (VIH/VIL), and power-down protection on all inputs. The device meets AEC-Q100 Rev. H reliability requirements and supports wide-voltage operation (2.0–5.5 V) with quiescent current as low as 4.0 µA max at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type transparent latch with 3-state outputs - enables bidirectional bus hold and data isolation in shared-bus architectures. |
| Propagation Delay (tPD) | 4.5 ns (typ.) at VCC = 5.0 V - supports high-speed digital timing in microcontroller peripheral interfaces and memory address latching. |
| Supply Voltage Range | 2.0 V to 5.5 V - allows direct integration into mixed-voltage systems (e.g., 3.3 V logic with 5 V legacy peripherals). |
| Operating Temperature | –40 °C to +125 °C - qualified per AEC-Q100 Rev. H for under-hood automotive and industrial environments. |
| Quiescent Current (ICC) | 4.0 µA (max) at Ta = 25 °C - ensures ultra-low static power in always-on subsystems such as sensor hubs and wake-up controllers. |
| Input Noise Immunity | VNIH/VNIL ≥ 28% VCC - provides robust operation in electrically noisy environments like motor drives and power converters. |
| Output Drive Strength | ±8 mA at VCC = 4.5 V - sufficient to drive standard TTL loads and multiple CMOS inputs without external buffers. |
Pinout & Package
TSSOP20B - 20-pin thin shrink small outline package (4.4 mm × 6.5 mm, 0.65 mm pitch), surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable | Active-high control: sets all Q outputs to high-impedance when high; enables normal Q output when low. |
| 2–9 (D0–D7) | Data Inputs | Asynchronous parallel data inputs; accept 0–5.5 V regardless of VCC due to input protection circuitry. |
| 10 (GND) | Ground | Reference return path for all internal logic and I/O circuits. |
| 11–18 (Q0–Q7) | Tri-State Outputs | Latched data outputs; high-impedance when OE = H, driven low/high when OE = L and LE has latched valid D values. |
| 19 (LE) | Latch Enable | Transparent latch control: Q follows D when LE = H; Q holds last D value when LE transitions from H to L. |
| 20 (VCC) | Supply Voltage | Positive supply rail (2.0–5.5 V); powers internal logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Rev. H qualification | Validated for automotive applications requiring extended temperature operation and long-term reliability under thermal cycling and humidity stress. |
| Wide voltage operation (2.0–5.5 V) | Eliminates need for external voltage translators when interfacing 3.3 V microcontrollers with 5 V legacy peripherals or sensors. |
| Input protection up to 5.5 V | Enables safe hot-plug and mixed-supply operation without risk of latch-up or damage during voltage sequencing mismatches. |
| Low dynamic noise (VOLP ≤ 1.0 V) | Reduces crosstalk and ground bounce in dense PCB layouts, critical for signal integrity in multi-channel data acquisition systems. |
| Pin- and function-compatible with 74AC/HC/AHC/LV 573 series | Allows drop-in replacement in existing designs using industry-standard octal latch footprints and logic behavior. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Isolating and latching sensor status signals (e.g., door open/closed, seatbelt buckle) before transmission to the main ECU over a shared CAN or LIN bus. IC Role / Device Role / Timing Role: Octal latch buffers and holds asynchronous mechanical switch inputs until polled by the MCU, preventing metastability and bus contention. Use Value: Enables deterministic sampling of noisy, slow-switching inputs while maintaining full 5 V compatibility and AEC-Q100 reliability. |
Use Scenario: Expanding discrete input capacity of a programmable logic controller by adding 8-channel opto-isolated field inputs to its backplane. IC Role / Device Role / Timing Role: Acts as a synchronous interface between isolated input cards and the PLC's 3.3 V FPGA/CPU bus, providing voltage translation and bus contention prevention via 3-state outputs. Use Value: Supports mixed-voltage operation (5 V field side / 3.3 V logic side) without external level shifters and withstands industrial ambient temperatures up to +125 °C. |
| Embedded System Address Latching | Test Equipment Digital Pattern Generator |
Use Scenario: Latching lower-order address bits (A0–A7) during multiplexed address/data bus cycles in 8-bit microcontroller-based instrumentation. IC Role / Device Role / Timing Role: Transparent latch captures address information on LE transition, holding stable addresses for memory or peripheral decode during data phase. Use Value: Delivers 4.5 ns typical tPD and balanced tPLH/tPHL to meet tight timing budgets in high-speed 8051 or Z80 derivatives with external memory. |
Use Scenario: Generating synchronized 8-bit stimulus patterns for IC functional testing, where pattern stability and fast output enable/disable are required between test vectors. IC Role / Device Role / Timing Role: Stores test vector data and presents it to DUT pins only when OE is active; enables rapid bus release (<6 ns tPLZ) between vector transitions. Use Value: Provides sub-10 ns 3-state disable time and low output skew (<10 ns) to ensure precise timing alignment across all 8 channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC573PW,118 (Nexperia) | Same TSSOP20 package and pinout; wider commercial temp range (–40 to +125 °C), but not AEC-Q100 qualified; ICC = 8 µA max (vs. 4 µA). | Suitable for industrial automation but not automotive safety-critical modules requiring AEC-Q100 certification. | Select when AEC-Q100 compliance is not required and higher quiescent current is acceptable. |
| SN74LV573APWR (Texas Instruments) | LV-family; VCC range 1.65–3.6 V only; 3.3 V optimized; tPD = 5.6 ns (typ.); no 5 V tolerance on inputs. | Restricted to 3.3 V-only systems; cannot replace 74VHC573FT in 5 V or mixed-voltage designs. | Choose only for pure 3.3 V applications where lower supply voltage and cost are prioritized over voltage flexibility. |
Compared with 74HC573PW,118 and SN74LV573APWR, the 74VHC573FT uniquely combines AEC-Q100 qualification, 2.0–5.5 V operation, 5.5 V-tolerant inputs, and ultra-low 4.0 µA ICC - making it the only option among the three suitable for automotive body electronics with battery-backup and mixed-supply constraints.
Availability
74VHC573FT is available at Aetrix Electronics and suitable for automotive body control, industrial PLC I/O expansion, embedded address latching, and test equipment digital pattern generation requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for 74VHC573FT 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability semiconductor components for automotive, industrial, and consumer applications, with emphasis on quality, longevity, and regulatory compliance.
The 74VHC573FT belongs to Toshiba's VHC-series advanced CMOS logic family, engineered specifically for high-speed, low-power, and AEC-Q100-compliant digital interfacing in harsh-environment electronics.
FAQ
What is the maximum operating temperature for the 74VHC573FT?
The 74VHC573FT is rated for continuous operation from –40 °C to +125 °C and is AEC-Q100 Rev. H qualified, making it suitable for under-hood automotive applications and high-temperature industrial environments. Its electrical characteristics-including propagation delay, output drive, and leakage current-are guaranteed across this full range.
Does the 74VHC573FT support 5 V tolerant inputs when powered from 3.3 V?
Yes, the 74VHC573FT features an input protection circuit that allows input voltages from 0 V to 5.5 V regardless of VCC level. When powered from 3.3 V, it safely accepts 5 V logic signals-enabling direct interfacing with legacy 5 V peripherals without external level shifters or clamping diodes.
Is the 74VHC573FT pin-compatible with standard 74-series 573 latches?
Yes, the 74VHC573FT is pin- and function-compatible with industry-standard 74AC/HC/AHC/LV 573-type octal latches. Its TSSOP20B footprint matches common 20-pin SOIC and TSSOP packages, and its truth table, timing behavior, and control logic (LE/OE) align with JEDEC-standard 573 functionality.
What is the typical propagation delay of the 74VHC573FT at 3.3 V supply?
At VCC = 3.3 V ± 0.3 V and Ta = 25 °C, the 74VHC573FT exhibits typical propagation delay (tPLH/tPHL) of 7.6 ns for LE→Q and 5.0 ns for D→Q, as specified in Section 12.7 of the Toshiba datasheet. These values remain within 16.0 ns max across the full –40 °C to +125 °C operating range.
Can the 74VHC573FT be used in battery-backed systems?
Yes, the 74VHC573FT is explicitly designed for two-supply systems such as battery backup. Its input protection prevents damage during supply voltage mismatches, and its ultra-low 4.0 µA max ICC at 25 °C minimizes standby current draw-critical for extending battery life in always-on monitoring circuits.
74VHC573FT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- 74VHC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- D-Type Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 2V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 6.5ns
- Current - Output High, Low:
- 8mA, 8mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74VHC573FT FAQ
1.How can I place an order for 74VHC573FT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHC573FT 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 74VHC573FT reliable?
The price and inventory of 74VHC573FT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHC573FT is usually 5 days.
3.What payment methods are accepted for 74VHC573FT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHC573FT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHC573FT?
74VHC573FT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHC573FT 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 74VHC573FT?
For technical support, including 74VHC573FT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHC573FT requirements.
6.How does Aetrix verify that 74VHC573FT is sourced from the original manufacturer or authorized distributors?
All 74VHC573FT 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 74VHC573FT meets industry standards.
7.What is the process for return or replacement of 74VHC573FT?
All 74VHC573FT units undergo pre-shipment inspection (PSI). If there is an issue with 74VHC573FT, 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 74VHC573FT part is unused and in its original packaging.
Return procedure for 74VHC573FT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74VHC573FT 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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