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Nexperia USA Inc. 74HC573DB,112
- Part No.:
- 74HC573DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HC573DB,112.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
74HC573DB,112 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for bus-oriented digital systems requiring data latching and output isolation. It features independent latch enable (LE, active HIGH) and output enable (OE, active LOW), operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C, and delivers 30 ns typical propagation delay at 4.5 V. It is used in microprocessor I/O port expansion and address/data bus buffering.
For engineers reviewing the 74HC573DB,112 datasheet, 74HC573DB,112 pinout, 74HC573DB,112 application, or 74HC573DB,112 equivalent, key selection criteria include 3-state bus drive capability, CMOS-level input compatibility, SO20 package mechanical fit, latch transparency timing, and industrial temperature range compliance.
Technical Context
The device implements eight independent D-type latches with synchronous parallel loading controlled by LE. When LE is HIGH, Qn follows Dn in real time (transparent mode); when LE transitions LOW, the input state is captured and held. OE operates independently to place all outputs in high-impedance state without affecting latch contents.
Input clamping diodes allow safe interfacing with voltages exceeding VCC using external current-limiting resistors. The logic family is HC (high-speed CMOS), ensuring TTL-compatible output drive while accepting CMOS-level inputs - distinct from the HCT variant which accepts TTL-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HC - high-speed CMOS, compatible with 2.0–6.0 V supply and CMOS-level inputs |
| Function | Octal transparent latch with 3-state non-inverting outputs and separate LE/OE controls |
| Propagation Delay | 30 ns typical (Dn→Qn) at VCC = 4.5 V, CL = 50 pF - determines maximum bus toggle rate |
| Supply Voltage Range | 2.0 V to 6.0 V - enables interoperability across 3.3 V and 5 V systems |
| Operating Temperature | -40 °C to +125 °C - qualified for industrial and extended-temperature embedded control |
| Output Drive | ±7.8 mA at VCC = 4.5 V - sufficient to drive standard TTL loads and multiple CMOS inputs |
| Power Dissipation | 8.0 μA typical ICC at VCC = 6.0 V - ultra-low static power for battery-sensitive applications |
Pinout & Package
74HC573DB,112 is supplied in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin numbering follows standard SOIC convention with pin 1 index marker at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable | Active LOW control: asserts high-impedance on all Q0–Q7 outputs without affecting latch state |
| 2–9 (D0–D7) | Data inputs | Parallel 8-bit data path entering latches when LE is HIGH; CMOS-level compatible |
| 10 (GND) | Ground reference | 0 V return for all internal circuitry and I/O; must be low-impedance connection |
| 11 (LE) | Latch enable | Active HIGH control: enables transparency (D→Q) when HIGH; captures Dn on HIGH-to-LOW edge |
| 12–19 (Q0–Q7) | Latched 3-state outputs | Non-inverting outputs mirroring stored Dn values; tri-stated when OE = HIGH |
| 20 (VCC) | Positive supply | Primary power rail (2.0–6.0 V); decoupling capacitor required near pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 2.0 V to 6.0 V operation enables direct use in mixed-voltage 3.3 V/5 V systems without level shifters |
| Independent LE and OE controls | Allows latching and bus release to be sequenced separately - critical for glitch-free bus arbitration |
| Input clamp diodes | Enable safe interface to signals exceeding VCC via external current-limiting resistors, simplifying mixed-supply interconnect |
| High noise immunity | Typical VIH = 3.15 V and VIL = 1.35 V at VCC = 4.5 V - provides >1.8 V noise margin against ground bounce or crosstalk |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - ensures robustness in noisy industrial environments |
Applications
| Microprocessor I/O Expansion | Address Latching in 8080/8085 Systems |
|---|---|
Use Scenario: Adding parallel I/O ports to legacy 8-bit microprocessors with limited native GPIO. IC Role / Device Role / Timing Role: Acts as bidirectional data latch between CPU data bus and peripheral devices; LE synchronized to WR signal, OE controlled by address decoder. Use Value: Enables stable 8-bit data capture during write cycles and high-Z tristate during read or idle - preventing bus contention. | Use Scenario: Capturing 8-bit address segments (e.g., A0–A7) in multiplexed AD bus architectures. IC Role / Device Role / Timing Role: Transparent latch holding lower address byte while upper address is driven; LE triggered by ALE pulse. Use Value: Provides deterministic address hold with <30 ns propagation delay - meeting tight setup/hold timing for memory-mapped peripherals. |
| LED Matrix Column Driver | Industrial PLC Input Conditioning |
Use Scenario: Driving 8-column LED matrix with row scanning controller. IC Role / Device Role / Timing Role: Stores column data from MCU and presents it in parallel to sink drivers; OE toggled per row scan cycle. Use Value: Delivers ±7.8 mA per output at 4.5 V - directly drives common-cathode LED columns without external transistors. | Use Scenario: Isolating and latching 8-channel digital sensor inputs in programmable logic controllers. IC Role / Device Role / Timing Role: Captures asynchronous field inputs on LE edge, then presents synchronized data to backplane bus via OE-gated outputs. Use Value: Input clamp diodes allow direct connection to 12 V/24 V industrial sensors using series resistors - eliminating discrete protection components. |
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,112 | TTL-level inputs (VIH = 2.0 V min), identical pinout and function | Better compatibility with legacy 5 V TTL logic families; slightly higher ICC | Select when interfacing with older 5 V TTL outputs or mixed-logic systems where input thresholds must match TTL specs |
| SN74HC573PWR | TSSOP20 package (SOT360-1), same electrical specs, 4.4 mm body width | Smaller footprint and improved thermal performance; requires fine-pitch PCB assembly | Select for space-constrained designs where SO20 height or board area is limiting, and reflow capability exists |
Compared with 74HCT573DB,112, the HC version offers superior noise margins in CMOS systems but lacks TTL input compatibility; compared with SN74HC573PWR, the 74HC573DB,112 provides easier hand-soldering and legacy board compatibility due to SO20 lead pitch and mechanical profile.
Availability
74HC573DB,112 is available at Aetrix Electronics and suitable for microprocessor I/O expansion, industrial PLC input conditioning, LED matrix column driving, and address latching in 8080/8085 systems requiring stable component supply across extended temperature ranges.
Supply support for 74HC573DB,112 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, and energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer applications.
The 74HC573 belongs to Nexperia's standard logic portfolio, engineered for robust bus interface and data latching in industrial control, legacy computing, and embedded systems where reliability across wide temperature and voltage ranges is essential.
FAQ
What is the difference between 74HC573DB,112 and 74HCT573DB,112?
The 74HC573DB,112 uses CMOS-level input thresholds (VIH ≥ 3.15 V at 4.5 V), while the 74HCT573DB,112 uses TTL-compatible inputs (VIH ≥ 2.0 V). Both share identical pinout, 3-state outputs, latch functionality, and SO20 packaging. Electrical performance, propagation delay, and supply range are otherwise matched.
Can 74HC573DB,112 operate reliably at 3.3 V?
Yes - the 74HC573DB,112 is fully specified from 2.0 V to 6.0 V. At 3.3 V, VIH = 2.31 V (70% of VCC) and VIL = 0.99 V (30% of VCC), providing 1.32 V noise margin. Propagation delay is ~38 ns typical, and output drive remains ±5.2 mA - sufficient for driving modern 3.3 V CMOS loads.
Is the GND pin (pin 10) electrically connected to the exposed pad in SO20 packages?
No - the exposed thermal pad in the SO20 (SOT163-1) package is not internally connected to GND. Per Nexperia documentation, it is a floating thermal pad with no electrical requirement for soldering; if soldered, it must remain electrically isolated or tied to GND externally per board design needs.
Does 74HC573DB,112 support hot insertion or live bus swapping?
No - the device lacks explicit hot-swap protection features such as power-up sequencing control or bus-fault current limiting. Input clamp diodes provide overvoltage tolerance only when current-limiting resistors are used. For live insertion, external protection circuitry (e.g., series resistors, TVS diodes) and strict power-rail sequencing are required.
74HC573DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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,112 FAQ
1.How can I place an order for 74HC573DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC573DB,112 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,112 reliable?
The price and inventory of 74HC573DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC573DB,112 is usually 5 days.
3.What payment methods are accepted for 74HC573DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC573DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC573DB,112?
74HC573DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC573DB,112 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,112?
For technical support, including 74HC573DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC573DB,112 requirements.
6.How does Aetrix verify that 74HC573DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HC573DB,112 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,112 meets industry standards.
7.What is the process for return or replacement of 74HC573DB,112?
All 74HC573DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC573DB,112, 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,112 part is unused and in its original packaging.
Return procedure for 74HC573DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC573DB,112 Tags
-
SN74HC573APWR
Texas Instruments
-
SN74HC573ADWR
Texas Instruments
-
SN74AHC573PWR
Texas Instruments
-
SN74HCT573DWR
Texas Instruments
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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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