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Texas Instruments SN74ALVTH16374DL
- Part No.:
- SN74ALVTH16374DL
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVTH16374DL.pdf
- Description:
- IC FF D-TYPE DUAL 8BIT 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:276
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Product details
Overview
SN74ALVTH16374DL from Texas Instruments is a 2.5-V/3.3-V 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for bidirectional bus interfacing in mixed-voltage systems. It features bus-hold circuitry on all data inputs, auto 3-state operation, and supports TTL-level inputs at 5 V while operating from 2.3 V to 3.6 V VCC - used in high-speed I/O port buffering and memory address latching.
For engineers reviewing the SN74ALVTH16374DL datasheet, SN74ALVTH16374DL pinout, SN74ALVTH16374DL application, or SN74ALVTH16374DL equivalent, key selection criteria include its 3.3-V/2.5-V dual-supply compatibility, 24/32-mA drive strength at 3.3 V, 250-MHz max clock frequency, bus-hold input retention, and SSOP-48 (DL) package thermal performance.
Technical Context
This device implements two independent 8-bit edge-triggered D-flip-flop sections, each with separate clock (CLK) and output-enable (OE) controls. Data is latched on the positive transition of CLK, and outputs enter high-impedance state when OE is high - enabling live insertion and bus contention avoidance.
It uses Advanced BiCMOS Technology (ABT) with distributed VCC/GND pins to minimize switching noise, and integrates bus-hold circuitry eliminating external pullup/pulldown resistors. Power-off output disable and <1.2-V power-up/down high-impedance behavior ensure safe hot-swap operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - enables interoperability between 2.5-V and 3.3-V logic domains and tolerance to supply ripple. |
| Max Clock Frequency | 250 MHz at VCC = 3.3 V - supports high-throughput data capture in modern digital interfaces. |
| Output Drive | –32 mA / +64 mA at 3.3 V - drives heavy capacitive loads and long PCB traces without external buffers. |
| Bus-Hold Current | ±75 µA at VI = 0.8 V / 2.0 V - maintains valid logic states on floating inputs without external resistors. |
| Propagation Delay | tPLH/tPHL ≤ 3.4 ns (CL = 50 pF, VCC = 3.3 V) - ensures tight timing margins in synchronous bus designs. |
| Input Voltage Tolerance | VI up to 5.5 V - allows direct connection to 5-V TTL buses without level-shifting components. |
| Power-Up Behavior | High-impedance state when VCC ≤ 1.2 V - prevents bus conflicts during power sequencing. |
Pinout & Package
SN74ALVTH16374DL is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 0.5-mm pitch, 12.6 mm × 6.2 mm body size, JEDEC MO-153 compliant, with exposed thermal pad not present and standard plastic molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output enable (active low) | Independent control per 8-bit section; asserts high-impedance output regardless of CLK/D state. |
| 1CLK, 2CLK | Clock input (positive edge) | Edge-triggered sampling of D inputs; asynchronous reset not supported. |
| 1D1–1D8, 2D1–2D8 | Data inputs | All feature integrated bus-hold; tolerate 5-V inputs while powered from 2.5/3.3 V. |
| 1Q1–1Q8, 2Q1–2Q8 | 3-state outputs | Auto 3-state activates when VO > VCC + 0.5 V; eliminates bus loading during overvoltage events. |
| VCC (Pins 13, 14, 25, 26, 37, 38) | Supply voltage | Distributed VCC pins reduce simultaneous switching noise and improve PDN stability. |
| GND (Pins 7, 8, 19, 20, 31, 32) | Ground reference | Multiple GND pins paired with VCC provide low-inductance return paths for high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs with 2.3–3.6-V VCC enables direct interface to legacy TTL buses without level shifters. |
| Auto 3-state output protection | Outputs automatically enter high-Z when VO exceeds VCC + 0.5 V - prevents latch-up and current backflow during overvoltage transients. |
| Bus-hold on all data inputs | Eliminates need for external 10-kΩ pullup/pulldown resistors, reducing BOM count and board area in sparse-bus applications. |
| Live insertion support | Outputs disabled when VCC = 0; high-impedance during power-up/down prevents bus conflicts in hot-plug systems. |
| Flow-through pin architecture | Input-to-output signal path crosses package diagonally - simplifies layer routing and reduces crosstalk in dense PCB layouts. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module I/O Expansion |
|---|---|
Use Scenario: Interfacing microcontroller GPIOs to 16-bit parallel sensor or actuator buses in electrically noisy factory environments. IC Role / Device Role / Timing Role: Bidirectional bus buffer and data latch synchronizing asynchronous peripheral reads/writes to system clock domain. Use Value: Bus-hold prevents floating inputs during sensor disconnect; 32-mA drive sustains signal integrity across 15-cm ribbon cables. | Use Scenario: Expanding MCU I/O count to manage door lock actuators, mirror controls, and lighting drivers in centralized body electronics units. IC Role / Device Role / Timing Role: Edge-triggered register capturing switch status or PWM command signals synchronized to vehicle CAN clock domain. Use Value: 5-V input tolerance accepts legacy switch inputs; auto 3-state avoids short-circuit risk during module replacement. |
| Test Equipment Digital Pattern Generator | Network Switch Management Interface |
Use Scenario: Generating precise, skew-controlled 16-bit stimulus patterns for ASIC validation under varying VCC conditions (2.5 V and 3.3 V). IC Role / Device Role / Timing Role: High-speed D-flip-flop array latching pattern data on rising CLK edge with sub-4-ns propagation delay. Use Value: 250-MHz fmax and 1.5-ns minimum pulse width support multi-gigabit test vector rates. | Use Scenario: Isolating management CPU from hot-swappable line card status/control buses in modular Ethernet switches. IC Role / Device Role / Timing Role: 3-state buffer isolating CPU-side control lines from card-side peripherals during insertion/removal. Use Value: Power-off output disable and <1.2-V high-Z guarantee zero bus contention during live card swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH16374DL | No bus-hold circuitry; lower drive (–24/+24 mA at 3.3 V); no 5-V input tolerance. | Suitable only in fully driven, non-floating bus environments with strict 3.3-V signaling. | Select when cost reduction is critical and external pullups or guaranteed signal presence is assured. |
| SN74LVC16374ADGGR | 3.3-V only (no 2.5-V min), no 5-V input tolerance, higher ICC (5 mA typical), no auto 3-state. | Requires level shifters for 5-V interfaces; lacks overvoltage fault protection on outputs. | Prefer for new 3.3-V-only designs where TI ABT process advantages (noise immunity, bus-hold) are not required. |
Compared with SN74ALVCH16374DL and SN74LVC16374ADGGR, SN74ALVTH16374DL uniquely combines 5-V-tolerant inputs, bus-hold, auto 3-state, and dual-voltage operation - making it irreplaceable in mixed-signal industrial and automotive backplane applications requiring robustness and design margin.
Availability
SN74ALVTH16374DL is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and test equipment digital pattern generators requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALVTH16374DL 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
SN74ALVTH16374DL belongs to TI's Widebus™ ABT logic family, engineered specifically for high-speed, low-noise, mixed-voltage bus interfacing in mission-critical industrial and automotive control systems.
FAQ
What is the maximum clock frequency supported by SN74ALVTH16374DL?
SN74ALVTH16374DL supports a maximum clock frequency of 250 MHz when operated at VCC = 3.3 V ± 0.3 V with CL = 50 pF load. At 2.5 V, the rated maximum is 150 MHz. These values are specified across the full operating temperature range (–40°C to 85°C) and assume proper signal integrity and decoupling.
Does SN74ALVTH16374DL require external pullup or pulldown resistors on its data inputs?
No. SN74ALVTH16374DL integrates bus-hold circuitry on all 16 data inputs (1D1–1D8, 2D1–2D8), which actively maintains the last-valid logic state when inputs float. This eliminates the need for external pullup or pulldown resistors, reducing BOM cost and PCB area - confirmed in TI's SCES068G datasheet Section 6.2.
Can SN74ALVTH16374DL safely interface with 5-V TTL logic while powered from 3.3 V?
Yes. SN74ALVTH16374DL accepts input voltages up to 5.5 V on all data and control pins while operating from VCC = 2.3 V to 3.6 V. Its 5-V-tolerant inputs allow direct connection to legacy TTL buses without level shifters - a core feature documented in the "Mixed-Mode Signal Operation" section of the datasheet.
What happens to the outputs of SN74ALVTH16374DL during power-up or power-down?
When VCC drops below or rises through 1.2 V, SN74ALVTH16374DL automatically places all outputs in high-impedance state - preventing bus conflicts during power sequencing. This behavior is guaranteed independent of OE pin state and is verified per JESD78 latch-up and I/O stress testing.
Is SN74ALVTH16374DL pin-compatible with other 48-pin 16-bit flip-flops like SN74ALVCH16374DL?
Yes - SN74ALVTH16374DL shares identical pinout, package (SSOP-DL), and terminal assignment with SN74ALVCH16374DL and SN74LVC16374A. However, functional differences exist: SN74ALVTH16374DL adds bus-hold, 5-V input tolerance, and auto 3-state, while others do not. PCB layout reuse is possible, but firmware and signal integrity validation must account for these distinctions.
SN74ALVTH16374DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 250 MHz
- Max Propagation Delay @ V, Max CL:
- 3.2ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Current - Quiescent (Iq):
- 100 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ALVTH16374DL FAQ
1.How can I place an order for SN74ALVTH16374DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16374DL 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 SN74ALVTH16374DL reliable?
The price and inventory of SN74ALVTH16374DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16374DL is usually 5 days.
3.What payment methods are accepted for SN74ALVTH16374DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVTH16374DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVTH16374DL?
SN74ALVTH16374DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH16374DL 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 SN74ALVTH16374DL?
For technical support, including SN74ALVTH16374DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16374DL requirements.
6.How does Aetrix verify that SN74ALVTH16374DL is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16374DL 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 SN74ALVTH16374DL meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16374DL?
All SN74ALVTH16374DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16374DL, 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 SN74ALVTH16374DL part is unused and in its original packaging.
Return procedure for SN74ALVTH16374DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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