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STMicroelectronics 74ALVCH16374TTR
- Part No.:
- 74ALVCH16374TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ALVCH16374TTR.pdf
- Description:
- IC FF D-TYPE DUAL 8BIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,420
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Product details
Overview
74ALVCH16374TTR from STMicroelectronics is a 16-bit non-inverting D-type flip-flop with 3-state outputs, dual clock (1CK/2CK) and dual output enable (1OE/2OE) control, 3.6V-tolerant I/O, bus-hold on data inputs, and operation from 1.65V to 3.6V. It delivers 4.2 ns max propagation delay at 3.0–3.6V and ±24 mA drive strength, enabling high-speed data latching in low-voltage memory interfaces and bus isolation circuits.
For engineers reviewing the 74ALVCH16374TTR datasheet, 74ALVCH16374TTR pinout, 74ALVCH16374TTR application, or 74ALVCH16374TTR equivalent, key selection criteria include voltage-range compatibility (1.65–3.6V), 3.6V-tolerant I/O for mixed-supply interfacing, dual independent 8-bit latch sections, bus-hold functionality for floating-input robustness, and TSSOP-48 package thermal and routing constraints.
Technical Context
This device implements two independent 8-bit edge-triggered D-type latches, each with dedicated clock and output-enable signals-enabling asynchronous control of two data groups. The dual-section architecture supports split-bus timing and independent output gating without internal crosstalk.
Bus-hold circuitry actively maintains last-valid logic state on all 16 data inputs when un-driven, eliminating external pull-up/down resistors. All I/O pins tolerate up to 3.6V regardless of VCC, allowing safe interfacing with higher-voltage peripherals while operating at 1.65V core supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 3.6 V - Enables single-rail operation across 1.8V and 3.3V systems, including battery-powered and mixed-voltage designs. |
| Max Propagation Delay (tPD) | 4.2 ns at VCC = 3.0–3.6V - Supports >300 MHz clock operation in high-speed data capture paths. |
| Output Drive Strength | ±24 mA at VCC = 3.0V - Drives 50 Ω transmission lines or multiple CMOS loads without buffering. |
| I/O Voltage Tolerance | 3.6 V - Permits direct connection to 3.3V or 3.6V buses while powered from 1.8V, avoiding level shifters. |
| Bus-Hold Current | ±75 µA at VCC = 3.0V - Maintains stable input logic during hot-swap or tri-state contention without external biasing. |
| ESD Rating (HBM) | >2000 V - Meets MIL-STD-883 Class 3A requirements for board-level handling and system integration. |
| Operating Temperature | −55 °C to +125 °C - Qualified for automotive under-hood and industrial control environments. |
Pinout & Package
TSSOP-48 package: 12.6 mm × 8.1 mm body, 0.5 mm pitch, 48-pin thin shrink small outline package with exposed pad not present; compliant with JEDEC MO-153AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | 1OE, 2OE | Active-low 3-state output enables - independently disable each 8-bit output group without affecting latch state or clocking. |
| 48, 25 | 1CK, 2CK | Positive-edge clock inputs - trigger parallel loading of corresponding D-input banks on rising edge only. |
| 37–47, 26–36 | 1D0–1D7, 2D0–2D7 | Data inputs with bus-hold - retain last valid logic level when open, eliminating need for external termination. |
| 2–3, 5–6, 8–9, 11–12, 13–14, 16–17, 19–20, 22–23 | 1Q0–1Q7, 2Q0–2Q7 | Non-inverting 3-state outputs - sink/source up to 24 mA while maintaining rail-to-rail swing and high-impedance off-state leakage <10 µA. |
| 4, 10, 15, 21, 28, 34, 39, 45 | GND | Eight ground connections - reduce simultaneous switching noise and improve signal integrity in high-speed 16-bit buses. |
| 7, 18, 31, 42 | VCC | Four power supply pins - lower impedance path for dynamic current demands during parallel output transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 8-bit latch sections | Enables time-isolated data capture on two separate buses using distinct clocks and output controls - critical for multi-domain SoC interconnects. |
| 3.6V-tolerant I/O at 1.65V VCC | Eliminates level-shifting components when interfacing with legacy 3.3V peripherals or FPGAs, reducing BOM count and PCB area. |
| Bus-hold on all 16 data inputs | Prevents floating-input metastability and EMI susceptibility in unconnected or hot-pluggable slots without external resistors. |
| High-speed 4.2 ns tPD at 3.3V | Supports setup/hold margins for 250+ MHz DDR-style data transfers in test equipment and protocol analyzers. |
| Low ICC quiescent current (20 µA) | Reduces standby power in always-on subsystems such as sensor hubs and real-time monitoring modules. |
Applications
| Memory Interface Buffering | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Isolating microcontroller address/data buses from SRAM or Flash memory arrays during read/write cycles. IC Role / Device Role / Timing Role: Acts as a transparent, edge-triggered data latch that synchronizes burst transfers between mismatched clock domains. Use Value: Prevents bus contention during memory access arbitration and ensures deterministic timing with 4.2 ns propagation delay and 1.5 ns hold margin. | Use Scenario: Expanding digital input/output capacity in programmable logic controllers with isolated field-side voltage domains. IC Role / Device Role / Timing Role: Provides galvanically isolated (via external optocouplers) 16-bit parallel I/O latching with bus-hold protection against contact bounce or cable disconnect. Use Value: Eliminates need for 16 external pull-up resistors per channel and tolerates 3.6V field-side transients while operating from 2.5V logic rails. |
| Test Equipment Data Capture | Automotive Diagnostic Interface |
Use Scenario: Capturing parallel digital waveforms from DUTs in automated test systems with precise timestamp alignment. IC Role / Device Role / Timing Role: Serves as a synchronous sampling latch synchronized to a master test clock, feeding captured data into FPGA-based analysis logic. Use Value: Delivers sub-nanosecond jitter margin via 4.2 ns tPD and 3.3 ns minimum clock pulse width, enabling reliable 300 MHz sampling. | Use Scenario: Interfacing microcontroller UART/SPI peripherals to legacy CAN/LIN transceivers requiring 3.3V-tolerant control signaling. IC Role / Device Role / Timing Role: Buffers and level-shifts configuration bits and status flags between 1.8V MCU GPIOs and 3.3V automotive communication ICs. Use Value: 3.6V I/O tolerance allows direct connection to transceiver control pins without discrete level translators, simplifying ISO 16750-compliant designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVTH16374GR | TI part with identical pinout and function but includes TTL-compatible input thresholds and slightly higher ICC (35 µA). | Designed for mixed-logic systems where 5V-tolerant inputs are required alongside 3.3V operation. | Select when interfacing with legacy 5V logic families; avoid if strict 1.65V minimum VCC is required. |
| 74LVC16374APAG | IDT part in TSSOP-48 with same 16-bit latch structure but no bus-hold; 3.6V I/O tolerance retained. | Lacks bus-hold, requiring external biasing on unused inputs in modular backplane designs. | Choose for cost-sensitive consumer applications where input termination is externally managed. |
Compared with SN74ALVTH16374GR and 74LVC16374APAG, the 74ALVCH16374TTR uniquely combines bus-hold, −55°C to +125°C rating, and lowest propagation delay (4.2 ns) at 3.3V, making it optimal for ruggedized, high-speed, and maintenance-free industrial interfaces.
Availability
74ALVCH16374TTR is available at Aetrix Electronics and suitable for memory interface buffering, industrial PLC I/O expansion, test equipment data capture, and automotive diagnostic interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ALVCH16374TTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The ALVCH logic family targets ultra-low-voltage, high-speed digital interfacing with enhanced noise immunity and mixed-supply interoperability - specifically engineered for next-generation portable, automotive, and industrial control systems.
FAQ
What is the minimum VCC required for guaranteed operation of the 74ALVCH16374TTR?
The device is fully specified down to 1.65 V across the full industrial temperature range (−55°C to +125°C), with DC and AC parameters validated at this voltage. Below 1.65 V, timing and drive strength are not guaranteed, and bus-hold functionality degrades below 1.5 V.
Does the 74ALVCH16374TTR require external pull-up or pull-down resistors on its data inputs?
No. All 16 data inputs feature integrated bus-hold circuitry that actively retains the last valid logic state when un-driven, eliminating the need for external biasing components in floating or hot-swap scenarios.
Can the 74ALVCH16374TTR safely interface with 5V logic signals?
No. Its inputs and outputs are rated for 3.6 V absolute maximum, not 5 V. Connecting to 5V sources risks permanent damage. For 5V interfacing, use a level translator or select a 5V-tolerant alternative like SN74ALVTH16374GR.
How many ground and power pins does the TSSOP-48 package provide, and why?
The TSSOP-48 package has eight GND and four VCC pins. This distribution minimizes ground bounce and supply droop during simultaneous 16-bit output switching, ensuring signal integrity and meeting stringent EMI requirements in high-density industrial PCB layouts.
74ALVCH16374TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74ALVTH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Clock Frequency:
- 300 MHz
- Max Propagation Delay @ V, Max CL:
- 4.2ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 40 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74ALVCH16374TTR FAQ
1.How can I place an order for 74ALVCH16374TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16374TTR 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 74ALVCH16374TTR reliable?
The price and inventory of 74ALVCH16374TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16374TTR is usually 5 days.
3.What payment methods are accepted for 74ALVCH16374TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16374TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVCH16374TTR?
74ALVCH16374TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16374TTR 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 74ALVCH16374TTR?
For technical support, including 74ALVCH16374TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16374TTR requirements.
6.How does Aetrix verify that 74ALVCH16374TTR is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16374TTR 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 74ALVCH16374TTR meets industry standards.
7.What is the process for return or replacement of 74ALVCH16374TTR?
All 74ALVCH16374TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16374TTR, 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 74ALVCH16374TTR part is unused and in its original packaging.
Return procedure for 74ALVCH16374TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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