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Nexperia USA Inc. 74HC573DB,118
- Part No.:
- 74HC573DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HC573DB,118.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,649
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Product details
Overview
74HC573DB,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, used for bus-oriented data latching in microprocessor I/O port expansion and address/data bus isolation. It operates from 2.0 V to 6.0 V, features active-HIGH latch enable (LE) and active-LOW output enable (OE), and delivers propagation delay as low as 14 ns at VCC = 6.0 V with CL = 50 pF.
For engineers reviewing the 74HC573DB,118 datasheet, 74HC573DB,118 pinout, 74HC573DB,118 application, or 74HC573DB,118 equivalent, this device serves as a bidirectional bus interface component requiring precise timing control, high noise immunity, and CMOS-level input compatibility in industrial control and embedded system designs.
Technical Context
The 74HC573DB,118 implements eight independent D-type latches with transparent operation when LE is HIGH and edge-triggered storage on LE HIGH-to-LOW transition. Its 3-state outputs are controlled solely by OE, independent of latch state, enabling clean bus sharing without affecting stored data.
Input clamping diodes allow safe interfacing with voltages exceeding VCC using current-limiting resistors. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports operation from –40 °C to +125 °C, and meets HBM ESD >2000 V and CDM >1000 V per JS-001/JS-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic systems without level shifters |
| Propagation delay (Dn→Qn) | 14 ns (typ) at VCC = 6.0 V, CL = 50 pF - ensures sub-70 MHz bus timing margin in synchronous latching |
| Output drive strength | ±7.8 mA at VCC = 4.5 V - sufficient to drive standard TTL loads and multiple CMOS inputs |
| Input threshold (VIH/VIL) | VIH = 4.2 V (min), VIL = 1.8 V (max) at VCC = 6.0 V - provides 1.2 V noise margin under worst-case conditions |
| Power dissipation capacitance | 26 pF - determines dynamic power consumption (PD = CPD × VCC² × fi × N) in high-frequency switching |
| Operating temperature | –40 °C to +125 °C - qualified for extended industrial and automotive-adjacent environments |
| Latch-up immunity | >100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events |
Pinout & Package
74HC573DB,118 is packaged in SO20 (SOT163-1): plastic small outline, 20-pin, 7.5 mm body width, surface-mountable with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable | Active-LOW control: drives all Q outputs to high-impedance when HIGH; no effect on internal latch state |
| 2–9 (D0–D7) | Data inputs | Asynchronous inputs feeding latch D-inputs; include clamp diodes for overvoltage tolerance |
| 10 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O; required for stable CMOS operation |
| 11 (LE) | Latch enable | Active-HIGH: enables transparency; HIGH-to-LOW edge captures Dn values into latches |
| 12–19 (Q0–Q7) | 3-state latch outputs | Non-inverting outputs reflecting latched Dn states when OE = LOW; tri-stated when OE = HIGH |
| 20 (VCC) | Supply voltage | Primary power rail (2.0–6.0 V); decoupling capacitor placement near this pin minimizes switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2.0 V to 6.0 V operation allows single-supply compatibility across 3.3 V and 5 V systems without translation |
| CMOS low power | ICC ≤ 8 μA (typ) at VCC = 6.0 V and 25 °C - reduces static power in battery-backed or always-on subsystems |
| High noise immunity | Guaranteed 1.2 V input noise margin at VCC = 6.0 V - maintains reliable operation in electrically noisy industrial enclosures |
| Opposite-side I/O layout | Dn on left side, Qn on right side in SO20 package - simplifies PCB routing for parallel bus interfaces with minimal trace crossovers |
| Bus-oriented 3-state outputs | Common OE pin controls all eight outputs simultaneously - enables clean time-multiplexed sharing of data/address buses |
Applications
| Industrial PLC I/O Expansion | Microcontroller Address Latching |
|---|---|
Use Scenario: Isolating and latching parallel I/O signals between a microcontroller and modular sensor/actuator racks in programmable logic controllers. IC Role / Device Role / Timing Role: Acts as an output port latch: stores command bits from MCU and presents stable levels to relay drivers while freeing the bus for other operations. Use Value: Enables deterministic timing control via LE edge capture and eliminates bus contention using OE-driven 3-state isolation during data transfers. |
Use Scenario: Latching lower address bytes (A0–A7) during multiplexed address/data bus cycles in 8-bit microcontroller systems (e.g., 8051 derivatives). IC Role / Device Role / Timing Role: Functions as an address latch: captures and holds address bits during AD0–AD7 bus phase, allowing external memory access without continuous address drive. Use Value: Reduces MCU pin count requirement and ensures address stability during memory read/write windows with guaranteed setup/hold times (tsu = 9 ns, th = 5 ns @ VCC = 6.0 V). |
| Legacy Bus Interface Adapter | Test Equipment Signal Conditioning |
Use Scenario: Bridging modern FPGA I/O banks to legacy parallel peripheral interfaces (e.g., ISA-style data acquisition cards) requiring 3-state bus arbitration. IC Role / Device Role / Timing Role: Serves as a bidirectional bus buffer/latch: isolates FPGA logic from bus loading and provides synchronized data capture on LE strobe. Use Value: Provides voltage-level compatibility (2.0–6.0 V), fast enable/disable timing (ten = 13 ns, tdis = 16 ns @ VCC = 6.0 V), and robust ESD protection (>2000 V HBM) for field-replaceable modules. |
Use Scenario: Capturing and holding digital stimulus patterns from pattern generators before applying them to DUT inputs in automated test equipment. IC Role / Device Role / Timing Role: Operates as a static pattern register: stores test vectors under LE control and presents them concurrently to multiple DUT pins via low-skew Q outputs. Use Value: Delivers matched propagation delays across all eight channels (Δtpd < 3 ns), minimizing inter-channel skew critical for timing-sensitive functional tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT573DB,118 | TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) vs. CMOS inputs in 74HC573 | Better interoperability with legacy 5 V TTL logic families; slightly higher ICC (≤160 μA max at 125 °C) | Select when interfacing with mixed-signal systems containing both TTL and CMOS components |
| SN74HC573N | DIP-20 through-hole package (SOT146-1); identical electrical specs but no thermal enhancement or surface-mount compatibility | Suitable for prototyping and low-volume manual assembly; lacks SO20's board space efficiency and reflow compatibility | Choose only for breadboard evaluation or legacy through-hole production where SO20 rework is impractical |
Compared with 74HCT573DB,118 and SN74HC573N, the 74HC573DB,118 offers optimal balance of CMOS input compatibility, SO20 surface-mount reliability, and industrial temperature support - making it preferred for volume-manufactured embedded controllers where board density and long-term thermal stability are critical.
Availability
74HC573DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller address latching, and legacy bus interface adapter designs requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 74HC573DB,118 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, reliable logic, analog, and discrete components optimized for efficiency, miniaturization, and robustness in industrial and consumer applications.
The 74HC573DB,118 belongs to Nexperia's HC-series logic family, designed specifically for low-power, high-noise-immunity digital interfacing in space-constrained and thermally demanding embedded systems.
FAQ
What is the maximum clock frequency supported by the 74HC573DB,118?
The 74HC573DB,118 is not a clocked sequential device-it has no internal clock input. Its maximum usable data rate depends on propagation delay (14 ns typ at VCC = 6.0 V) and system timing margins. For reliable transparent-mode operation, input changes must be stable for ≥9 ns before and ≥5 ns after LE HIGH-to-LOW transition per datasheet timing requirements.
Can OE and LE be tied together for simplified control?
No-OE and LE serve fundamentally different functions and must be controlled independently. Tying them together would prevent simultaneous latching and output disabling: LE must go LOW to store data, but OE must remain HIGH to disable outputs during that action. Doing so risks bus contention or unintended output states.
Does the 74HC573DB,118 support hot insertion or live bus swapping?
No-74HC573DB,118 is not hot-swap rated. Its absolute maximum ratings do not cover powered insertion into live backplanes. Input clamping diodes provide limited overvoltage protection (±20 mA), but uncontrolled VCC ramp-up or floating GND during insertion can cause latch-up or parametric failure.
How does the SO20 package (SOT163-1) compare thermally to TSSOP20 or DHVQFN20 variants?
The SO20 package (SOT163-1) has a thermal resistance θJA of ~109 °C/W (derating starts above 109 °C), higher than TSSOP20 (~100 °C/W) and DHVQFN20 (~111 °C/W). While SO20 offers mechanical robustness and ease of inspection, DHVQFN20 provides superior thermal performance for high-density, high-power-density layouts due to its exposed thermal pad and thinner profile.
74HC573DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SSOP
74HC573DB,118 FAQ
1.How can I place an order for 74HC573DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC573DB,118 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 74HC573DB,118 reliable?
The price and inventory of 74HC573DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC573DB,118 is usually 5 days.
3.What payment methods are accepted for 74HC573DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC573DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC573DB,118?
74HC573DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC573DB,118 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 74HC573DB,118?
For technical support, including 74HC573DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC573DB,118 requirements.
6.How does Aetrix verify that 74HC573DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HC573DB,118 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 74HC573DB,118 meets industry standards.
7.What is the process for return or replacement of 74HC573DB,118?
All 74HC573DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC573DB,118, 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 74HC573DB,118 part is unused and in its original packaging.
Return procedure for 74HC573DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC573DB,118 Tags
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SN74HC573APWR
Texas Instruments
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SN74HC573ADWR
Texas Instruments
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SN74AHC573PWR
Texas Instruments
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SN74HCT573DWR
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SN74HC373N
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SN74HC573AN
Texas Instruments
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74VHC573MTCX
onsemi
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MC74LCX573DTR2G
onsemi
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74AUP1G373GW,125
Nexperia USA Inc.
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SN74LVC1G373DCKR
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SN74LVC1G373DBVR
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NC7SZ373P6X
onsemi
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