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STMicroelectronics 74VCXH16374TTR
- Part No.:
- 74VCXH16374TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74VCXH16374TTR.pdf
- Description:
- IC FF D-TYPE DUAL 8BIT 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,225
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Product details
Overview
74VCXH16374TTR 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 all data inputs, and propagation delay of 3.0 ns (max) at VCC = 3.0–3.6 V. It operates across 2.3–3.6 V and delivers ±24 mA drive strength at 3.0 V, enabling use in low-voltage high-speed bus interface and data latching applications.
For engineers reviewing the 74VCXH16374TTR datasheet, 74VCXH16374TTR pinout, 74VCXH16374TTR application, or 74VCXH16374TTR equivalent, key selection criteria include dual 8-bit latch control, 3.6V I/O tolerance for mixed-voltage system interfacing, symmetrical output drive, bus-hold functionality eliminating external resistors, and guaranteed skew ≤0.5 ns for synchronized parallel data capture.
Technical Context
This device implements two independent 8-bit D-type latches-each with dedicated clock (1CK/2CK) and output enable (1OE/2OE)-supporting concurrent or staggered data capture and tri-state control. All 32 I/O pins (16 D, 16 Q, 2 OE, 2 CK) are 3.6V tolerant, allowing direct connection to legacy 3.3V or 3.6V buses while powered from 2.3–3.6V supplies.
Bus-hold circuitry on all 16 data inputs maintains valid logic states during floating conditions, eliminating need for external pull-up/down resistors. Latch-up immunity exceeds 300 mA (JESD17), and ESD robustness meets HBM >2000 V and MM >200 V, supporting reliable operation in industrial and portable environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - Enables interoperability with both 2.5V and 3.3V logic domains without level shifters. |
| tPD (Max) | 3.0 ns at VCC = 3.0–3.6 V - Supports >235 MHz clock operation for high-throughput data staging. |
| IOL / IOH (Min) | ±24 mA at VCC = 3.0 V - Drives heavy capacitive loads (e.g., 10+ CMOS inputs) without signal degradation. |
| IOH = IOL Symmetry | Matched drive strength ensures consistent rise/fall times and minimized timing skew across outputs. |
| Bus Hold Current | ±75 µA at VI = 0.8 V / 2.0 V (VCC = 3.0 V) - Actively retains input state during bus contention or idle periods. |
| tOSLH / tOSHL (Max) | 0.5 ns - Guarantees <0.5 ns inter-output skew for deterministic parallel data capture timing. |
| VIH / VIL Thresholds | VIH = 2.0 V, VIL = 0.8 V (VCC = 3.0 V) - Compatible with standard 3.3V LVTTL and LVCMOS signaling levels. |
Pinout & Package
TSSOP-48 package (12.6 mm × 8.1 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | 1OE, 2OE | Active-low 3-state output enables - independently disable each 8-bit output bank without affecting internal latch state. |
| 48, 25 | 1CK, 2CK | Positive-edge clock inputs - trigger simultaneous capture of 1D0–1D7 or 2D0–2D7 into respective Q outputs. |
| 37–47, 26–36 | 1D0–1D7, 2D0–2D7 | Data inputs with integrated bus-hold - retain last valid logic level when un-driven, removing external bias components. |
| 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 - drive bidirectional buses with controlled impedance and fast turn-on/turn-off (tPZL/tPLZ ≤ 3.5 ns). |
| 4, 10, 15, 21, 28, 34, 39, 45 | GND | Eight ground connections - reduce ground bounce and improve noise immunity in high-speed switching. |
| 7, 18, 31, 42 | VCC | Four power supply pins - lower IR drop and stabilize core voltage under dynamic load conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 8-bit latch architecture | Independent clock and output enable per bank allow time-multiplexed or isolated data capture paths. |
| 3.6V-tolerant I/O | Operates from 2.3–3.6V supply while accepting and driving 0–3.6V signals - simplifies mixed-voltage board design. |
| Symmetrical ±24 mA drive | Equal sourcing/sinking capability ensures matched edge rates and reduces signal integrity risk on shared buses. |
| Integrated bus-hold | Eliminates 16 external pull resistors - saves PCB area, BOM cost, and improves reliability in hot-swap or partial-power-down scenarios. |
| Latch-up immunity >300 mA | Meets JESD17 Class II - supports robust operation in noisy industrial environments with transient coupling risks. |
Applications
| High-Speed Memory Interface | Low-Voltage Bus Transceiver |
|---|---|
|
Use Scenario: Latching address/data between a 2.5V FPGA and 3.3V SRAM subsystem with tight setup/hold timing margins. IC Role / Device Role / Timing Role: Dual-bank D-flip-flop acts as a synchronous interface buffer, capturing parallel data on rising clock edges with sub-3.5 ns propagation delay and <0.5 ns skew. Use Value: Enables reliable 200+ MHz memory access without external level shifters or timing-critical discrete logic. |
Use Scenario: Isolating and driving a shared 16-bit data bus among multiple 2.3–3.6V microcontrollers in an automotive body control module. IC Role / Device Role / Timing Role: 3-state output control allows one MCU to drive the bus while others enter high-Z mode; bus-hold prevents floating inputs during transitions. Use Value: Reduces component count by eliminating 16 pull-up resistors and supports glitch-free bus arbitration across voltage domains. |
| Industrial PLC I/O Expansion | Portable Device Power Sequencing |
|
Use Scenario: Capturing real-time sensor data from 16 analog-to-digital converters before transmission to a main controller via SPI or parallel interface. IC Role / Device Role / Timing Role: Acts as a parallel input latch, synchronizing asynchronous ADC outputs using independent clocks per 8-bit group for staggered sampling. Use Value: Provides deterministic sampling alignment and eliminates metastability risk in multi-channel acquisition systems. |
Use Scenario: Controlling power-enable sequencing for multiple 2.5V/3.3V subsystems (e.g., RF, audio, display) in battery-powered handheld equipment. IC Role / Device Role / Timing Role: Configured as a static register - outputs hold stable enable signals after power-up, with bus-hold preserving state during brown-out events. Use Value: Ensures repeatable power-up order and prevents race conditions during low-voltage reset recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit dual-latch with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16374ADGGR | Lower VCC range (1.65–3.6 V); no bus-hold; 32 mA drive at 3.3 V; 4.2 ns tPD (max) at 3.3 V. | Requires external pull resistors; better suited for designs already using LVC family and needing higher drive. | Select if higher output current is prioritized over bus-hold and lowest propagation delay. |
| 74ALVC16374PW | Narrower VCC range (2.3–2.7 V only); no 3.6V I/O tolerance; 2.5 ns tPD (max); no bus-hold. | Limited to strict 2.5V systems; incompatible with 3.3V interfaces without level translation. | Choose only for legacy 2.5V-only designs where minimal tPD outweighs voltage flexibility needs. |
Compared with SN74LVC16374ADGGR and 74ALVC16374PW, the 74VCXH16374TTR uniquely combines 3.6V I/O tolerance, integrated bus-hold, and sub-3.0 ns propagation delay - making it optimal for mixed-voltage, space-constrained, and high-reliability embedded interfaces.
Availability
74VCXH16374TTR is available at Aetrix Electronics and suitable for high-speed memory interface, low-voltage bus transceiver, and industrial PLC I/O expansion requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 74VCXH16374TTR 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 VCXH logic family targets low-voltage, high-speed interface applications with 3.6V-tolerant I/O and bus-hold - specifically engineered for robust mixed-voltage system integration in space- and power-constrained designs.
FAQ
What is the maximum clock frequency supported by the 74VCXH16374TTR?
The device supports up to 250 MHz maximum clock frequency at VCC = 3.0–3.6 V and 200 MHz at VCC = 2.3–2.7 V, as specified in AC Electrical Characteristics. This is derived from guaranteed tPLH/tPHL ≤ 3.0 ns (max) and tw ≥ 1.5 ns minimum pulse width, ensuring reliable setup/hold timing margins in high-speed synchronous systems.
Does the 74VCXH16374TTR require external pull-up or pull-down resistors on its data inputs?
No. All 16 data inputs feature integrated bus-hold circuitry, which actively maintains the last valid logic state when inputs are un-driven. This eliminates the need for external bias resistors, reducing BOM count, PCB area, and potential signal integrity issues caused by resistor parasitics.
Can the 74VCXH16374TTR interface directly with 3.3V logic while operating at 2.5V VCC?
Yes. Its 3.6V-tolerant inputs and outputs allow full compatibility with 3.3V signal levels regardless of VCC (2.3–3.6 V). When powered at 2.5V, it accepts VIH ≥ 1.6 V and VIL ≤ 0.7 V, and drives VOH ≥ 2.0 V and VOL ≤ 0.4 V at ±12 mA - meeting 3.3V LVTTL thresholds without level-shifting circuitry.
How does the dual-clock/dual-OE architecture improve system design flexibility?
The independent 1CK/2CK and 1OE/2OE controls allow separate timing and enable management for two 8-bit data groups. This enables staggered sampling, selective bus isolation, or time-multiplexed data routing - e.g., capturing sensor data on one bank while transmitting processed results from the other, all within a single TSSOP-48 package.
74VCXH16374TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74VCXH
- 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:
- 235 MHz
- Max Propagation Delay @ V, Max CL:
- 3.5ns @ 3.3V, 30pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 6 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74VCXH16374TTR FAQ
1.How can I place an order for 74VCXH16374TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCXH16374TTR 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 74VCXH16374TTR reliable?
The price and inventory of 74VCXH16374TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCXH16374TTR is usually 5 days.
3.What payment methods are accepted for 74VCXH16374TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCXH16374TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VCXH16374TTR?
74VCXH16374TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCXH16374TTR 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 74VCXH16374TTR?
For technical support, including 74VCXH16374TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCXH16374TTR requirements.
6.How does Aetrix verify that 74VCXH16374TTR is sourced from the original manufacturer or authorized distributors?
All 74VCXH16374TTR 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 74VCXH16374TTR meets industry standards.
7.What is the process for return or replacement of 74VCXH16374TTR?
All 74VCXH16374TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VCXH16374TTR, 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 74VCXH16374TTR part is unused and in its original packaging.
Return procedure for 74VCXH16374TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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