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Nexperia USA Inc. 74AHCT573PW,118
- Part No.:
- 74AHCT573PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT573PW,118.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,784
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Product details
Overview
74AHCT573PW,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for bus interface and data buffering in 5 V TTL-level systems. It features independent latch enable (LE) and output enable (OE) controls, overvoltage-tolerant inputs up to 5.5 V, and operates across –40 °C to +125 °C. Key confirmed parameters: propagation delay ≤7.0 ns (VCC = 5 V, CL = 15 pF), supply range 4.5–5.5 V, input threshold VIH = 2.0 V (TTL-compatible), and 20-pin TSSOP package.
For engineers reviewing the 74AHCT573PW,118 datasheet, 74AHCT573PW,118 pinout, 74AHCT573PW,118 application, or 74AHCT573PW,118 equivalent, this device serves as a high-speed, low-power latching buffer for microcontroller address/data buses, FPGA I/O expansion, and industrial control backplanes where level translation and bus isolation are required.
Technical Context
The 74AHCT573PW,118 implements eight independent D-type latches with transparent operation when LE is HIGH and edge-triggered capture on LE HIGH-to-LOW transition. Its TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V at VCC = 4.5–5.5 V) ensure reliable interfacing with legacy 5 V logic families.
Outputs drive ±8 mA at VCC = 4.5 V with VOL ≤ 0.36 V and VOH ≥ 3.94 V, and enter high-impedance state within 11.0 ns of OE assertion. Input clamping and ESD protection (HBM > 2000 V, CDM > 1000 V) support robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AHCT - TTL-input CMOS-output, enabling direct replacement of 74LS devices with lower power and higher noise immunity |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V systems while rejecting supply ripple up to ±0.5 V |
| Propagation Delay (tpd) | ≤7.0 ns @ VCC = 5 V, CL = 15 pF - supports 100+ MHz bus clocking in transparent mode |
| Output Drive Strength | ±8 mA @ VCC = 4.5 V - sufficient to drive 50 Ω transmission lines or fan-out of 10 LS-TTL loads |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives |
| Input Overvoltage Tolerance | Up to 5.5 V regardless of VCC - allows safe interfacing between mixed-voltage subsystems without external level shifters |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - exceeds JEDEC JS-001/JS-002 Class 2/C3 requirements for assembly-line handling |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20 leads, body width 4.4 mm, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable (active LOW) | Asserting LOW enables Q0–Q7 outputs; HIGH forces all outputs into high-impedance state without affecting internal latch state |
| 2–9 (D0–D7) | Data Inputs | Asynchronous inputs accepting TTL-level signals; overvoltage tolerant to 5.5 V independent of VCC |
| 10 (GND) | Ground Reference | 0 V return path for all internal circuitry and output drivers; decoupling capacitor must be placed adjacent to this pin |
| 11 (LE) | Latch Enable (active HIGH) | HIGH enables transparent mode; HIGH-to-LOW edge captures D0–D7 values into internal latches |
| 12–19 (Q0–Q7) | 3-State Outputs | Reflect latched Dn values when OE = LOW; tri-state when OE = HIGH; capable of driving 50 Ω loads |
| 20 (VCC) | Supply Voltage | Primary power rail (4.5–5.5 V); requires local 100 nF ceramic decoupling between pins 10 and 20 |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Compatible Inputs | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V - eliminates need for external level translators when interfacing with 74LS or microcontroller GPIO |
| Overvoltage-Tolerant I/O | Inputs withstand 5.5 V regardless of VCC setting - enables safe hot-swap and mixed-supply board designs |
| Low Propagation Skew | tpd variation ≤1.5 ns across all 8 channels - ensures deterministic timing in parallel bus applications |
| High Noise Immunity | Input hysteresis via Schmitt-trigger action - rejects <1.5 ns glitches and improves signal integrity in EMI-prone environments |
| Thermal-Enhanced Package | TSSOP20 (SOT360-1) with 10.0 mW/K derating above 100 °C - supports sustained operation at full speed in compact enclosures |
Applications
| Microcontroller Bus Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Isolating and latching 8-bit address/data bus between an ARM Cortex-M4 MCU and external SRAM or peripheral IC. IC Role / Device Role / Timing Role: Acts as bidirectional transparent latch during bus cycles; captures address on LE edge and holds it stable during memory access. Use Value: Enables single-cycle bus sharing without wait states; 7.0 ns tpd ensures setup/hold margins remain intact at 80 MHz bus clocks. |
Use Scenario: Extending limited FPGA GPIO count to drive multiple LED arrays, relays, or sensor interfaces in industrial PLC modules. IC Role / Device Role / Timing Role: Provides synchronized, glitch-free output staging from FPGA fabric to external loads using shared OE control. Use Value: Eliminates FPGA pin contention; 8 mA drive strength directly powers LEDs or drives optocouplers without external transistors. |
| Industrial Backplane Buffer | Legacy System Upgrade |
Use Scenario: Buffering and isolating 8-bit control signals across a 200 mm PCB backplane in motor drive cabinets subject to 2 kV EFT bursts. IC Role / Device Role / Timing Role: Latches command bits from master controller and presents them to slave modules via shielded differential pairs. Use Value: HBM > 2000 V and latch hold time ≥1.5 ns prevent metastability during EMC events; TSSOP package minimizes board area. |
Use Scenario: Replacing obsolete 74LS373 latches in aging test equipment while retaining identical PCB footprint and firmware. IC Role / Device Role / Timing Role: Drop-in functional replacement with identical pinout, logic behavior, and timing sequence (LE/OE polarity). Use Value: Reduces power consumption by 85% vs. 74LS373 at 5 V; eliminates need for heat sinks due to 4.0 μA ICC standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHC573PW,118 | CMOS-input version; VIH = 3.85 V @ VCC = 5.5 V; wider supply range (2.0–5.5 V) | Suitable for mixed-voltage domains (e.g., 3.3 V MCU controlling 5 V peripherals) | Select when interfacing with CMOS logic or requiring dual-supply flexibility |
| SN74HCT573PWR | TI part; identical TTL input thresholds but higher ICC (max 80 μA vs. 40 μA at 125 °C); same TSSOP-20 package | Valid for TI-centric BOMs; slightly higher thermal load in high-density layouts | Prefer when existing TI qualification or sourcing agreements apply |
Compared with 74AHC573PW,118 and SN74HCT573PWR, the 74AHCT573PW,118 offers optimal balance of low static power, guaranteed TTL compatibility, and industrial temperature support - making it ideal for cost-sensitive, high-reliability 5 V systems where input voltage margin and ESD robustness are critical.
Availability
74AHCT573PW,118 is available at Aetrix Electronics and suitable for microcontroller bus interface, FPGA I/O expansion, industrial backplane buffering, and legacy system upgrades requiring stable component supply and long-term lifecycle assurance.
Supply support for 74AHCT573PW,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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and consumer markets.
The 74AHCT573 forms part of Nexperia's industry-standard logic portfolio, engineered specifically for robust 5 V TTL-system interfacing with enhanced ESD tolerance, wide temperature operation, and drop-in compatibility with legacy 74LS devices.
FAQ
What is the maximum clock frequency supported by the 74AHCT573PW,118 in transparent mode?
The device does not operate on a clock signal; instead, its maximum usable data rate depends on propagation delay and system timing margins. With tpd ≤ 7.0 ns (VCC = 5 V, CL = 15 pF), it supports reliable transparent operation up to 100 MHz bus frequencies when combined with ≥3.5 ns setup/hold times and proper PCB layout.
Can the 74AHCT573PW,118 be used with a 3.3 V supply?
No - the 74AHCT573 variant is specified only for 4.5 V to 5.5 V operation. Using 3.3 V violates recommended conditions and results in undefined input thresholds (VIH/VIL) and degraded output drive. For 3.3 V systems, select the 74AHC573PW,118 variant instead.
Is the exposed thermal pad on the TSSOP20 package electrically connected?
No - the exposed pad in SOT360-1 is a mechanical thermal enhancement feature only. Nexperia documentation explicitly states it has no electrical function and may be left floating or connected to GND if soldered, but no electrical connection is required or implied.
How does the latch enable (LE) timing interact with data input transitions?
Data at D0–D7 is passed directly to Q0–Q7 only while LE is HIGH (transparent mode). On the HIGH-to-LOW transition of LE, the device samples and holds the input values present one setup time (tsu = 3.5 ns) before the edge. Inputs changing within th = 1.5 ns after the edge cause metastability and must be avoided.
74AHCT573PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 4.5V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 3.5ns
- Current - Output High, Low:
- 8mA, 8mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AHCT573PW,118 FAQ
1.How can I place an order for 74AHCT573PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT573PW,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 74AHCT573PW,118 reliable?
The price and inventory of 74AHCT573PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT573PW,118 is usually 5 days.
3.What payment methods are accepted for 74AHCT573PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT573PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT573PW,118?
74AHCT573PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT573PW,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 74AHCT573PW,118?
For technical support, including 74AHCT573PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT573PW,118 requirements.
6.How does Aetrix verify that 74AHCT573PW,118 is sourced from the original manufacturer or authorized distributors?
All 74AHCT573PW,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 74AHCT573PW,118 meets industry standards.
7.What is the process for return or replacement of 74AHCT573PW,118?
All 74AHCT573PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT573PW,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 74AHCT573PW,118 part is unused and in its original packaging.
Return procedure for 74AHCT573PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT573PW,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
Texas Instruments
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SN74HC373N
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SN74HC573AN
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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
Texas Instruments
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NC7SZ373P6X
onsemi
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