My Inquiry
My Account
Nexperia USA Inc. 74HC573BQ,115
- Part No.:
- 74HC573BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74HC573BQ,115.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:36,065
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74HC573BQ,115 from Nexperia is an octal D-type transparent latch with 3-state outputs, used for data latching and bus isolation in microprocessor I/O expansion, memory address buffering, and peripheral interfacing. It operates from 2.0 V to 6.0 V, features latch enable (LE) and output enable (OE) control, and delivers propagation delay as low as 14 ns at VCC = 6.0 V with CL = 50 pF.
For engineers reviewing the 74HC573BQ,115 datasheet, 74HC573BQ,115 pinout, 74HC573BQ,115 application, or 74HC573BQ,115 equivalent, key selection criteria include its CMOS-level input compatibility, -40 °C to +125 °C operating range, DHVQFN20 thermal-enhanced package, and precise timing parameters including tpd (Dn→Qn), tsu/th, and ten/tdis.
Technical Context
This device implements eight independent D-type latches with shared LE and OE controls, enabling simultaneous capture of 8-bit parallel data on a HIGH-to-LOW LE transition while maintaining transparency during LE HIGH. Its 3-state outputs support bidirectional bus sharing without contention.
The DHVQFN20 package (SOT764-1) provides 20 terminals in a 2.5 × 4.5 × 0.85 mm footprint with exposed thermal pad, supporting high-density PCB layouts and improved thermal performance over SO20 or TSSOP20 variants. Input clamp diodes allow safe interfacing with voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V. |
| Propagation delay (Dn→Qn) | 14 ns (typ) at VCC = 6.0 V, CL = 50 pF - enables reliable 35 MHz+ data capture in high-speed digital control paths. |
| Set-up time (tsu) | 9 ns (min) at VCC = 6.0 V - defines minimum data stability window before LE falling edge for deterministic latching. |
| Enable time (ten) | 13 ns (typ) at VCC = 6.0 V - determines fastest achievable bus turnaround when enabling outputs after OE deassertion. |
| Output drive strength | ±7.8 mA (IOH/IOL) at VCC = 6.0 V - sufficient to drive standard TTL loads or multiple CMOS inputs without external buffers. |
| Input leakage current | ±0.1 μA (max) at VCC = 6.0 V - ensures minimal power draw and signal integrity in low-power standby modes. |
| Operating temperature | -40 °C to +125 °C - qualified for industrial and extended-temperature embedded applications without derating. |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, no leads, 20-terminal quad flat layout with exposed thermal pad (non-soldered or floating per datasheet guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground node; required for stable logic thresholds and noise immunity. |
| 2–9 | D0–D7 | Asynchronous parallel data inputs; sampled on LE HIGH or latched on LE HIGH-to-LOW transition. |
| 10 | GND (thermal pad) | Non-electrical thermal interface pad; may be left floating or connected to GND plane for thermal relief. |
| 11 | LE | Latch enable (active HIGH); controls transparency vs. storage mode; synchronous edge-triggered behavior. |
| 12–19 | Q0–Q7 | 3-state non-inverting latch outputs; driven only when OE = LOW; high-impedance when OE = HIGH. |
| 20 | VCC | Positive supply rail; powers internal logic and output drivers; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2.0 V to 6.0 V operation enables direct interface with 3.3 V and 5 V systems without level shifters. |
| CMOS-level inputs | VIH ≥ 3.15 V (at VCC = 4.5 V) and VIL ≤ 1.35 V - compatible with standard HC logic families and microcontroller GPIOs. |
| 3-state bus interface | Common OE input allows synchronized bus release across all 8 outputs, preventing contention in shared-data-path designs. |
| Latch transparency | Outputs track inputs continuously while LE = HIGH - supports real-time monitoring and dynamic data routing. |
| ESD robustness | HBM > 2000 V and CDM > 1000 V - reduces risk of handling damage during assembly and field service. |
Applications
| Microprocessor I/O Expansion | Memory Address Latching |
|---|---|
|
Use Scenario: Expanding GPIO count on an ARM Cortex-M4 MCU by adding parallel 8-bit port via address/data bus. IC Role / Device Role / Timing Role: Acts as bidirectional data latch between MCU data bus and peripheral registers, controlled by LE from address strobe and OE from chip select. Use Value: Enables deterministic read/write cycles with 14 ns propagation delay and sub-10 ns setup time, eliminating timing violations in 20 MHz bus operation. |
Use Scenario: Capturing upper address bits from a Z80 CPU during instruction fetch to drive external memory bank select logic. IC Role / Device Role / Timing Role: Transparent latch holding A8–A15 during MREQ active, then storing address for memory decode while bus transitions to data phase. Use Value: Provides clean address hold with 5 ns hold time margin and 13 ns enable time, ensuring glitch-free bank switching at 4 MHz CPU clock. |
| Industrial Sensor Interface | PLC Digital I/O Module |
|
Use Scenario: Isolating and buffering 8-channel analog-to-digital converter outputs before transmission to a fieldbus controller. IC Role / Device Role / Timing Role: Latches ADC parallel output on conversion complete signal (LE), then presents data to controller bus only when enabled (OE). Use Value: Prevents bus contention during ADC conversion; ±7.8 mA drive strength ensures reliable signal integrity over 10 cm PCB traces at 5 V. |
Use Scenario: Implementing isolated input conditioning for 8-channel discrete sensor inputs in a DIN-rail mounted PLC module. IC Role / Device Role / Timing Role: Synchronizes opto-isolator outputs into a common latch, then presents consolidated status to backplane bus under programmable OE control. Use Value: Supports -40 °C to +125 °C ambient operation with <0.1 μA input leakage, minimizing false triggers in harsh industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT573BQ,115 | TTL-compatible inputs (VIH = 2.0 V min), identical pinout and timing at 4.5–5.5 V. | Better interoperability with legacy 5 V TTL logic and microcontrollers lacking 3.3 V tolerant inputs. | Select when interfacing with 5 V-only systems where HC-level VIH would cause marginal recognition. |
| SN74HC573PWR | TSSOP20 package (SOT360-1), same electrical specs but 4.4 mm body width and 0.65 mm pitch. | Higher board density than DHVQFN20 but lower thermal performance; no exposed pad for heat dissipation. | Choose for cost-sensitive, space-constrained designs where thermal load is low and reflow profile supports fine-pitch packages. |
Compared with 74HCT573BQ,115, the HC variant offers wider voltage flexibility (2–6 V) but requires higher VIH; versus SN74HC573PWR, the DHVQFN20 improves thermal resistance by ~25 % and enables tighter routing around the package perimeter.
Availability
74HC573BQ,115 is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and test equipment requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for 74HC573BQ,115 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and consumer electronics.
The 74HC573BQ belongs to Nexperia's HC logic family, designed specifically for low-power, high-noise-immunity digital interfacing in space-constrained and thermally demanding applications.
FAQ
What is the maximum clock frequency supported by the 74HC573BQ,115?
The 74HC573BQ,115 is not a clocked register but a transparent latch; it has no internal clock. Its usable data rate depends on external timing constraints: with 14 ns propagation delay and 9 ns setup time at VCC = 6.0 V, it supports reliable latching up to approximately 35 MHz in systems where LE is driven by a clean, jitter-controlled strobe signal meeting specified timing margins.
Can the thermal pad (pin 10) be soldered to ground?
Yes, the thermal pad (pin 10) may be soldered to a GND plane for improved thermal dissipation, but the datasheet explicitly states there is no electrical requirement to do so. If soldered, the land must remain electrically floating or connected only to GND - never to any other net - to avoid violating internal isolation design and risking latch malfunction.
How does the 74HC573BQ,115 differ from the 74HC574 in system design?
The 74HC573BQ,115 is a transparent latch (edge-triggered on LE falling edge, transparent when LE HIGH), whereas the 74HC574 is a positive-edge D flip-flop. In practice, this means the 573 allows real-time data observation during LE HIGH, while the 574 captures only on clock edges. The 573 is preferred for address latching and bus isolation; the 574 suits synchronous pipeline stages.
Is the 74HC573BQ,115 suitable for automotive applications?
No. The 74HC573BQ,115 is rated for -40 °C to +125 °C operation but is not AEC-Q100 qualified. Nexperia explicitly states that unless designated "automotive qualified" in the datasheet, the part is unsuitable for safety-critical or life-support automotive systems. It may be used in non-safety automotive infotainment or diagnostics tools only with full customer validation.
74HC573BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 2V ~ 6V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 14ns
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74HC573BQ,115 FAQ
1.How can I place an order for 74HC573BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC573BQ,115 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 74HC573BQ,115 reliable?
The price and inventory of 74HC573BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC573BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HC573BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC573BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC573BQ,115?
74HC573BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC573BQ,115 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 74HC573BQ,115?
For technical support, including 74HC573BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC573BQ,115 requirements.
6.How does Aetrix verify that 74HC573BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HC573BQ,115 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 74HC573BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HC573BQ,115?
All 74HC573BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC573BQ,115, 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 74HC573BQ,115 part is unused and in its original packaging.
Return procedure for 74HC573BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC573BQ,115 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
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
