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Nexperia USA Inc. 74HCT573PW,112
- Part No.:
- 74HCT573PW,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT573PW,112.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,168
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Product details
Overview
74HCT573PW,112 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for bus-oriented digital systems requiring data latching and controlled output isolation. It operates at 4.5 V to 5.5 V, features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), supports -40 °C to +125 °C operation, and delivers propagation delay of 20–53 ns (VCC = 4.5 V, CL = 50 pF). It is used in microprocessor I/O port expansion and address/data bus buffering.
For engineers reviewing the 74HCT573PW,112 datasheet, 74HCT573PW,112 pinout, 74HCT573PW,112 application, or 74HCT573PW,112 equivalent, key selection criteria include its TTL-level input compatibility, 3-state output enable timing (ten = 17–45 ns), latch enable setup/hold requirements (tsu = 13 ns, th = 9 ns @ VCC = 4.5 V), and TSSOP20 package thermal performance (Ptot derating: 10.0 mW/K above 100 °C).
Technical Context
The 74HCT573PW,112 implements eight independent D-type latches with shared LE (latch enable, active HIGH) and OE (output enable, active LOW) controls. Its transparent mode allows real-time D-to-Q tracking while LE is HIGH; a HIGH-to-LOW LE transition captures and holds the input state. OE independently places all Q outputs in high-impedance without affecting internal latch states.
Input clamping diodes permit safe interfacing with voltages exceeding VCC when current-limiting resistors are used. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports HBM ESD >2000 V and CDM >1000 V, and meets latch-up immunity >100 mA per JESD78 Class II Level B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures reliable operation with standard 5 V TTL logic rails and tolerance for supply ripple. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees interoperability with legacy TTL outputs without level shifting. |
| Propagation Delay | 20–53 ns (Dn→Qn, VCC = 4.5 V, CL = 50 pF) - Determines maximum bus clock rate in latched data paths. |
| 3-State Enable Time | ten = 17–45 ns (OE→Qn) - Sets minimum time required to isolate outputs during bus arbitration. |
| Operating Temperature | -40 °C to +125 °C - Validated for industrial and extended-temperature embedded control environments. |
| Power Dissipation | Ptot = 500 mW (TSSOP20); derates 10.0 mW/K above 100 °C - Defines thermal limits for sustained switching in compact PCB layouts. |
| Output Drive | ±6 mA (VOH/VOL @ VCC = 4.5 V) - Supports direct connection to standard CMOS/TTL loads without external buffers. |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-lead, body width 4.4 mm, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable input | Active LOW control: drives all Q outputs to high-impedance when asserted, independent of latch state. |
| 2 (VCC) | Positive supply rail | 4.5–5.5 V power source; decoupling capacitor placement critical near this pin for noise immunity. |
| 3–10 (D0–D7) | Data inputs | Asynchronous inputs feeding respective latches; accept TTL-level signals directly. |
| 11 (LE) | Latch enable input | Active HIGH: enables transparent mode; HIGH-to-LOW edge captures Dn values into latches. |
| 12–19 (Q0–Q7) | 3-state latch outputs | Non-inverting outputs reflecting stored Dn values when OE = LOW and latched; tri-stated when OE = HIGH. |
| 20 (GND) | Ground reference | 0 V return path for supply and signal currents; must be low-impedance for stable logic thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min / VIL = 0.8 V max enables direct interface with 5 V TTL outputs without level translation. |
| Shared 3-state control | Single OE pin disables all eight outputs simultaneously, simplifying bus contention management in multi-device systems. |
| Transparent latch operation | LE = HIGH allows real-time D-to-Q tracking-critical for debugging, test access, and dynamic bus monitoring. |
| Input clamp diodes | Enable safe overvoltage tolerance (e.g., 12 V inputs) when series current-limiting resistors are used on Dn/OE/LE pins. |
| High noise immunity | CMOS process with hysteresis-free inputs achieves >40 % VCC noise margin under recommended operating conditions. |
Applications
| Microprocessor I/O Port Expansion | Address/Data Bus Latching |
|---|---|
Use Scenario: Expanding GPIO count on an 8-bit microcontroller by latching parallel peripheral data (e.g., keypad scan, LED matrix control). IC Role / Device Role / Timing Role: Acts as bidirectional I/O port buffer; LE synchronized to MCU write strobe to capture data, OE controlled for read/write direction. Use Value: Eliminates need for discrete logic or larger CPLDs-reduces BOM cost and board area while maintaining full-speed 5 V TTL compatibility. | Use Scenario: Separating multiplexed address/data bus lines (e.g., AD0–AD7 on 8051 derivatives) into dedicated address and data paths. IC Role / Device Role / Timing Role: Transparent latch captures address bits during ALE pulse; OE disabled during data phase to isolate address lines from data bus noise. Use Value: Enables use of standard 8-bit data buses with multiplexed addressing-avoids timing skew and signal integrity issues in legacy 8-bit system designs. |
| Industrial PLC Input Conditioning | Test Equipment Signal Routing |
Use Scenario: Isolating and latching 24 V sensor inputs (via optocoupler + resistor divider) into a 5 V logic domain within programmable logic controllers. IC Role / Device Role / Timing Role: Provides input synchronization and bus isolation; LE triggered by PLC scan cycle, OE used for diagnostic readback. Use Value: Delivers deterministic sampling of noisy industrial inputs while enabling hot-swap-safe bus disconnection during maintenance. | Use Scenario: Routing multiple DUT signals through a boundary-scan or functional test fixture where signal path selection must be glitch-free. IC Role / Device Role / Timing Role: Functions as a static signal selector-LE freezes test vector inputs, OE enables/disables output to DUT under test. Use Value: Prevents signal contention during test reconfiguration; 3-state outputs ensure no back-driving of adjacent channels during switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT573PWR (TI) | Identical logic function, pinout, and DC specs; tpd = 19–51 ns (VCC = 4.5 V, CL = 50 pF), slightly faster typical propagation. | Same bus-oriented use cases; qualified to AEC-Q100 Grade 3 (-40 °C to +85 °C) but not +125 °C. | Select when sourcing from TI distribution channels or requiring automotive-grade documentation-even if ambient range is narrower. |
| 74LVC573APW,118 (Nexperia) | Lower voltage operation (1.65–3.6 V), LVCMOS inputs (VIH = 2.0 V @ VCC = 3.3 V), higher speed (tpd = 3.2–5.2 ns @ VCC = 3.3 V), smaller Ptot (300 mW). | Targeted at 3.3 V systems only; incompatible with 5 V buses unless level-shifted; unsuitable for legacy 5 V designs. | Choose for new 3.3 V embedded designs prioritizing speed and power efficiency-avoid for 5 V TTL interoperability. |
Compared with SN74HCT573PWR, the 74HCT573PW,112 offers broader temperature support (+125 °C vs. +85 °C) and identical 5 V TTL compatibility; versus 74LVC573APW, it maintains full 5 V bus integration capability at the cost of higher propagation delay and power.
Availability
74HCT573PW,112 is available at Aetrix Electronics and suitable for industrial control systems, legacy microprocessor-based instrumentation, and 5 V bus-isolated test fixtures requiring stable component supply across extended temperature ranges.
Supply support for 74HCT573PW,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 specializing in high-volume, high-reliability logic, analog, and discrete components, with leadership in automotive and industrial-grade standard products.
The 74HCT573 belongs to Nexperia's high-speed CMOS logic family, engineered specifically for robust 5 V TTL-compatible interfacing in industrial automation, test equipment, and legacy computing infrastructure.
FAQ
What is the maximum clock frequency supported by the 74HCT573PW,112?
The 74HCT573PW,112 is not a clocked register-it has no internal clock input. Its effective data throughput depends on external timing: with LE pulse width ≥16 ns (min) and Dn setup/hold times met (tsu = 13 ns, th = 9 ns @ VCC = 4.5 V), it supports bus cycles up to ~10 MHz in transparent mode and lower rates in latched mode due to propagation delays (20–53 ns).
Can the 74HCT573PW,112 drive LEDs directly?
No. Its outputs deliver ±6 mA (VCC = 4.5 V), insufficient for most indicator LEDs requiring 10–20 mA. It can drive high-impedance CMOS/TTL inputs or serve as a bus buffer, but LED driving requires external transistors or dedicated LED drivers to avoid exceeding output current limits and degrading VOL/VOH.
Is the exposed pad on the TSSOP20 package electrically connected?
No. The exposed thermal pad on the SOT360-1 (TSSOP20) package is not electrically connected to any internal node. Per Nexperia documentation, it may remain floating or be connected to GND for thermal improvement-but must not be soldered to a voltage rail other than GND, and no electrical requirement exists for soldering it.
How does the 74HCT573PW,112 differ from the 74HC573PW?
The 74HCT573PW uses TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), ensuring reliable interfacing with 5 V TTL outputs. The 74HC573PW uses CMOS thresholds (VIH ≈ 3.15 V @ VCC = 4.5 V), which may misread marginal TTL signals. Both share identical pinout, 3-state operation, and packaging-but only the HCT version guarantees robust 5 V mixed-logic compatibility.
74HCT573PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 17ns
- Current - Output High, Low:
- 6mA, 6mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74HCT573PW,112 FAQ
1.How can I place an order for 74HCT573PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT573PW,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 74HCT573PW,112 reliable?
The price and inventory of 74HCT573PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT573PW,112 is usually 5 days.
3.What payment methods are accepted for 74HCT573PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT573PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT573PW,112?
74HCT573PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT573PW,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 74HCT573PW,112?
For technical support, including 74HCT573PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT573PW,112 requirements.
6.How does Aetrix verify that 74HCT573PW,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT573PW,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 74HCT573PW,112 meets industry standards.
7.What is the process for return or replacement of 74HCT573PW,112?
All 74HCT573PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT573PW,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 74HCT573PW,112 part is unused and in its original packaging.
Return procedure for 74HCT573PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT573PW,112 Tags
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