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Nexperia USA Inc. 74HCT573D-Q100,118
- Part No.:
- 74HCT573D-Q100,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HCT573D-Q100,118.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,928
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Product details
Overview
74HCT573D-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified octal D-type transparent latch with 3-state outputs, designed for automotive bus interfacing. It operates from 4.5 V to 5.5 V, features TTL-compatible inputs, latch enable (LE) and output enable (OE) controls, and delivers propagation delay as low as 15 ns (VCC = 5 V, CL = 15 pF). It is used in engine control units (ECUs) to isolate and hold microcontroller address/data bus signals during memory or peripheral access cycles.
For engineers reviewing the 74HCT573D-Q100 datasheet, 74HCT573D-Q100 pinout, 74HCT573D-Q100 application, or 74HCT573D-Q100 equivalent, this device is selected for its automotive qualification, precise set-up/hold timing (tsu = 13 ns, th = 9 ns at VCC = 4.5 V), robust 3-state bus driving capability (±6 mA), and SO20 package compatibility with legacy PCB layouts.
Technical Context
The 74HCT573D-Q100 implements eight independent D-latch cells with shared LE and OE controls. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure reliable interfacing with legacy microcontrollers and FPGAs without level-shifting. The latch operates in transparent mode when LE is HIGH and holds data on the HIGH-to-LOW transition of LE, decoupling data capture from output enable timing.
Output behavior is fully independent of OE state: latched data remains stable regardless of OE, and 3-state disable (high-impedance) occurs only when OE is HIGH. Input clamp diodes allow safe interface to voltages exceeding VCC when used with current-limiting resistors - a key requirement in mixed-voltage automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 5.5 V - Matches standard automotive 5 V rail; avoids under-voltage lockout or over-stress in 12 V system-derived supplies. |
| Propagation Delay (Dn→Qn) | 15 ns typical at VCC = 5 V, CL = 15 pF - Enables reliable operation in 20 MHz+ bus systems with margin for trace delays. |
| Set-up / Hold Time | 13 ns / 9 ns at VCC = 4.5 V - Defines minimum data stability window before LE edge; critical for synchronous bus handshaking. |
| Output Drive Strength | ±6.0 mA at VOH/VOL - Sustains logic levels across 50 Ω transmission lines or fan-out to ≥10 LS-TTL loads. |
| Input Threshold Compatibility | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees interoperability with 5 V TTL, CMOS, and microcontroller GPIO without external biasing. |
| Operating Temperature | −40 °C to +125 °C - Qualified per AEC-Q100 Grade 1 for under-hood automotive environments including powertrain modules. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - Meets automotive ESD immunity requirements for assembly and field operation. |
Pinout & Package
74HCT573D-Q100 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads. Pin 1 index located at top-left corner with notch marking orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable (active LOW) | Asserting LOW enables Q0–Q7 outputs; HIGH places all outputs in high-impedance state - essential for bus arbitration. |
| 2–9 (D0–D7) | Data inputs | Asynchronous parallel data inputs; accept TTL-level signals directly; clamp diodes permit overvoltage tolerance with series resistors. |
| 10 (GND) | Ground reference | Primary 0 V return path; must be low-inductance connection to minimize ground bounce during simultaneous output switching. |
| 11 (LE) | Latch enable (active HIGH) | HIGH enables transparent mode (Qn follows Dn); HIGH-to-LOW edge captures and holds data - synchronizes latch action to system clock or strobe. |
| 12–19 (Q0–Q7) | 3-state non-inverting latch outputs | Drive bidirectional buses; output impedance < 25 Ω in active state; < 10 MΩ in OFF-state - prevents bus contention. |
| 20 (VCC) | Positive supply | 4.5–5.5 V nominal; bypass capacitor (100 nF ceramic) required within 5 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C operation with full reliability testing - meets automotive safety-critical module requirements. |
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V - eliminates need for external level shifters when interfacing with legacy 5 V logic families. |
| Independent latch and output control | LE governs data capture; OE governs bus drive - enables pipelined data staging and dynamic bus sharing without data corruption. |
| Clamp diode protected inputs | Allows safe interface to signals up to VCC + 0.5 V using series current-limiting resistors - simplifies design in mixed-supply domains (e.g., CAN transceivers). |
| SO20 footprint compatibility | SOT163-1 package matches industry-standard SOIC-20 land pattern - supports drop-in replacement and legacy board reuse. |
Applications
| Engine Control Unit (ECU) Address Latching | Instrument Cluster Display Interface |
|---|---|
Use Scenario: Holding multiplexed address/data bus signals during flash memory read/write cycles in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Acts as address latch between MCU and external NOR flash; LE synchronized to ALE signal, OE controlled by memory select. Use Value: Prevents bus contention during memory access; ensures deterministic address setup time (13 ns) for reliable 40 MHz bus operation. |
Use Scenario: Buffering segmented segment driver data from MCU to 7-segment LED display in digital instrument clusters. IC Role / Device Role / Timing Role: Provides isolated, glitch-free data staging between MCU GPIO and display driver ICs; OE toggled per digit scan cycle. Use Value: Eliminates ghosting/flicker via precise 3-state control; ±6 mA drive sustains brightness across long PCB traces to remote displays. |
| Body Control Module (BCM) I/O Expansion | ADAS Camera Sensor Interface |
Use Scenario: Expanding GPIO count for door lock actuator control and window motor feedback in BCMs. IC Role / Device Role / Timing Role: Functions as bi-directional I/O port latch; Dn inputs monitor switch status, Qn outputs drive relay drivers. Use Value: Enables single-cycle input sampling and output update; latch transparency allows real-time monitoring during diagnostic routines. |
Use Scenario: Isolating high-speed parallel image data path between image sensor and SoC in surround-view camera modules. IC Role / Device Role / Timing Role: Synchronizes pixel data capture using LE aligned to sensor VSYNC; OE manages data flow to avoid FIFO overflow. Use Value: 15 ns propagation delay preserves timing margins in 25 MHz pixel clocks; automotive temp range ensures reliability behind vehicle grilles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT573PW-Q100 | TSSOP20 package (SOT360-1); 4.4 mm body width; same electrical specs and AEC-Q100 Grade 1 rating. | Required for space-constrained PCBs where SO20 footprint is unavailable; thermal resistance higher than SO20 (100 °C/W vs. 85 °C/W). | Select when board area is limited and reflow profile supports fine-pitch TSSOP; verify solder joint inspection capability for AOI. |
| SN74HCT573QPWRQ1 | Texas Instruments variant; identical function and pinout; AEC-Q100 Grade 1; VCC range 4.5–5.5 V; tpd = 17 ns (typ) at 5 V. | Same automotive use cases; slightly longer propagation delay may impact timing-critical 25+ MHz bus designs. | Choose for TI-design ecosystems or dual-sourcing; validate timing closure with 2 ns added delay margin. |
Compared with 74HCT573PW-Q100, the 74HCT573D-Q100 offers lower thermal resistance and proven SO20 layout compatibility; versus SN74HCT573QPWRQ1, it provides tighter propagation delay (15 ns vs. 17 ns), enabling higher bus clock margins in timing-sensitive automotive modules.
Availability
74HCT573D-Q100 is available at Aetrix Electronics and suitable for engine control units, instrument clusters, body control modules, and ADAS camera interfaces requiring stable component supply across automotive production lifecycles.
Supply support for 74HCT573D-Q100 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-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and computing markets.
The 74HCT573-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for robust bus interfacing in harsh environments - emphasizing AEC-Q100 compliance, wide temperature operation, and noise-immune TTL-compatible signaling.
FAQ
Can 74HCT573D-Q100 operate at 3.3 V?
No. The 74HCT573D-Q100 is specified only for 4.5 V to 5.5 V supply. Its TTL-compatible inputs require VIH ≥ 2.0 V, but internal HCT logic thresholds and output drive strength are not guaranteed below 4.5 V. For 3.3 V systems, use the 74LVC573A-Q100 instead.
What is the maximum capacitive load the outputs can drive?
The outputs are characterized up to 50 pF (per Table 7 test conditions), with typical rise/fall times of 5 ns (VCC = 4.5 V). Driving >50 pF increases transition time and may violate setup/hold windows in high-speed buses; add series termination or buffer stages for loads exceeding 75 pF.
Is the GND pin (Pin 10) electrically connected to the exposed pad in SO20?
No. The SO20 package (SOT163-1) has no exposed thermal pad. Pin 10 is the sole GND connection. Unlike DHVQFN variants, SO20 relies on lead-frame conduction; ensure low-impedance PCB ground plane connection to Pin 10 and adjacent VCC bypassing.
How does latch enable (LE) interact with output enable (OE) during power-up?
At power-up, both LE and OE default to HIGH (via internal weak pull-ups per Nexperia's HCT design), placing outputs in high-impedance and latches in transparent mode. To prevent bus glitches, assert OE LOW only after VCC stabilizes and initialize LE to LOW before releasing it - ensuring known latch state prior to first data capture.
74HCT573D-Q100,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 17ns
- Current - Output High, Low:
- 6mA, 6mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74HCT573D-Q100,118 FAQ
1.How can I place an order for 74HCT573D-Q100,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT573D-Q100,118 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 74HCT573D-Q100,118 reliable?
The price and inventory of 74HCT573D-Q100,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT573D-Q100,118 is usually 5 days.
3.What payment methods are accepted for 74HCT573D-Q100,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT573D-Q100,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT573D-Q100,118?
74HCT573D-Q100,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT573D-Q100,118 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 74HCT573D-Q100,118?
For technical support, including 74HCT573D-Q100,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT573D-Q100,118 requirements.
6.How does Aetrix verify that 74HCT573D-Q100,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT573D-Q100,118 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 74HCT573D-Q100,118 meets industry standards.
7.What is the process for return or replacement of 74HCT573D-Q100,118?
All 74HCT573D-Q100,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT573D-Q100,118, 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 74HCT573D-Q100,118 part is unused and in its original packaging.
Return procedure for 74HCT573D-Q100,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT573D-Q100,118 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
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