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Texas Instruments SN74ALVCH16374DLR
- Part No.:
- SN74ALVCH16374DLR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH16374DLR.pdf
- Description:
- IC FF D-TYPE DUAL 8BIT 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,902
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Product details
Overview
SN74ALVCH16374DLR from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65-V to 3.6-V operation. It features ±24-mA output drive at 3.3 V, 4.2-ns max propagation delay, bus-hold on data inputs, and dual 8-bit or single 16-bit configuration-used in I/O port buffering and bidirectional bus driving in industrial control and telecom interface boards.
For engineers reviewing the SN74ALVCH16374DLR datasheet, SN74ALVCH16374DLR pinout, SN74ALVCH16374DLR application, or SN74ALVCH16374DLR equivalent, key selection criteria include its 48-pin SSOP (DL) package, 3.3-V-compatible 3-state output control, bus-hold functionality eliminating external resistors, and guaranteed timing performance across -40°C to 85°C.
Technical Context
This device implements two independent 8-bit positive-edge-triggered D flip-flop banks, each with individual clock (1CLK/2CLK) and output-enable (1OE/2OE) controls. All 16 Q outputs are 3-state capable, supporting high-impedance bus isolation during power-up/down when OE is pulled up to VCC.
Internal bus-hold circuitry actively maintains valid logic states on undriven D inputs without external components. The design meets JESD 17 latch-up immunity (>250 mA) and JESD 22 ESD ratings (2000-V HBM, 200-V MM), ensuring robustness in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - supports mixed-voltage system interfacing (1.8 V, 2.5 V, 3.3 V logic domains) |
| Max Propagation Delay | 4.2 ns at 3.3 V - enables reliable operation in high-speed digital buses up to 150 MHz clock frequency |
| Output Drive Strength | ±24 mA at 3.3 V - directly drives standard CMOS loads and short PCB traces without buffers |
| Input Bus-Hold | Integrated on all D inputs - eliminates need for external pullup/pulldown resistors in floating-input scenarios |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems and communications equipment |
| ESD Protection | 2000-V HBM, 200-V MM - exceeds JEDEC standards for handling and board-level reliability |
| Latch-Up Immunity | >250 mA per JESD 17 - prevents destructive latch-up under transient overvoltage conditions |
Pinout & Package
SN74ALVCH16374DLR uses a 48-pin SSOP (Shrink Small-Outline Package) with 0.5-mm pitch, 12.6 mm × 6.2 mm body size, and 1.2-mm max height per JEDEC MO-153. Pin 1 is located at top-left corner with notch marking orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output Enable (active-low) | Controls high-impedance state of respective 8-bit output bank; does not affect internal flip-flop operation |
| 1CLK, 2CLK | Clock input (positive edge) | Triggers simultaneous latching of eight D inputs into corresponding Q outputs on rising edge |
| 1D1–1D8, 2D1–2D8 | Data inputs | Asynchronous inputs with integrated bus-hold; retain last valid logic level when floating |
| 1Q1–1Q8, 2Q1–2Q8 | 3-state outputs | Driven high/low or placed in high-Z based on OE state; ±24-mA drive capability at 3.3 V |
| VCC, GND | Power supply pins | Multiple distributed VCC/GND pairs minimize switching noise and improve signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 1.65 V to 3.6 V operation enables interoperability across 1.8-V, 2.5-V, and 3.3-V logic families |
| Bus-Hold Inputs | Eliminates external biasing components on D inputs, reducing BOM count and layout complexity |
| High-Speed Timing | 4.2-ns tpd at 3.3 V supports 150-MHz clock rates for real-time data capture and forwarding |
| Robust Output Drive | ±24-mA drive strength allows direct connection to multiple CMOS loads or short trace runs |
| Industrial Temp Range | -40°C to +85°C qualification ensures stable performance in factory automation and outdoor telecom gear |
Applications
| Industrial PLC I/O Module | Telecom Line Card Buffer |
|---|---|
Use Scenario: Isolating and latching sensor/actuator signals in programmable logic controller backplanes with mixed-voltage peripherals. IC Role / Device Role / Timing Role: Acts as a 16-bit synchronized input register and output latch, providing glitch-free signal sampling on CLK edge with OE-controlled bus release. Use Value: Bus-hold prevents floating inputs during hot-swap events; 3.3-V-compatible drive interfaces directly with FPGA I/O banks without level shifters. |
Use Scenario: Buffering parallel control/status data between DSPs and line interface units in TDM-based access equipment. IC Role / Device Role / Timing Role: Functions as dual 8-bit edge-triggered register for time-slot alignment and direction control of bidirectional HDLC frames. Use Value: 4.2-ns propagation delay ensures setup/hold margin compliance at 150-MHz bus clocks; 3-state outputs enable shared backplane arbitration. |
| Automotive Body Control Gateway | Test Equipment Digital Pattern Generator |
Use Scenario: Managing discrete switch inputs and LED driver outputs in centralized vehicle body controllers operating from 12-V battery via 3.3-V LDO. IC Role / Device Role / Timing Role: Serves as configurable 16-bit general-purpose I/O expander with synchronous update and safe power-up default (high-Z). Use Value: Integrated bus-hold avoids false triggers from harness noise; latch-up immunity >250 mA withstands load dump transients. |
Use Scenario: Generating precise, synchronized stimulus vectors for IC functional testing using pattern memory and timing sequencers. IC Role / Device Role / Timing Role: Provides deterministic, low-skew 16-bit parallel output staging with programmable enable timing relative to test clock. Use Value: ±24-mA drive sustains signal integrity across 50-Ω terminated test fixtures; 3.3-V operation matches ATE logic voltage standards. |
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 |
|---|---|---|---|
| SN74LVC16374ADGGR | Lower drive (±24 mA only at 3.3 V; reduced at 1.8 V), no bus-hold, same 48-pin TSSOP | Requires external pullups on unused inputs; less suitable for undriven or noisy I/O environments | Preferred where cost sensitivity outweighs bus-hold requirement and 1.8-V operation is needed |
| 74AVC16374TTR | Higher speed (3.2 ns tpd), 1.2-V to 3.6-V range, 48-pin TSSOP, no bus-hold | Lacks bus-hold; requires careful input termination; optimized for ultra-low-voltage portable designs | Chosen when sub-2-V operation is mandatory and board layout ensures controlled input biasing |
Compared with SN74ALVCH16374DLR, SN74LVC16374ADGGR offers identical pinout but omits bus-hold-increasing BOM and layout effort-while 74AVC16374TTR extends voltage range downward at the expense of robustness in uncontrolled input environments.
Availability
SN74ALVCH16374DLR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom line card buffers, automotive body control gateways, and automated test equipment requiring stable component supply across extended temperature ranges.
Supply support for SN74ALVCH16374DLR 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 leader specializing in analog, embedded processing, and logic solutions, with decades of experience in high-reliability industrial and automotive ICs.
The SN74ALVCH16374DLR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage bus interface and data latching in space-constrained industrial and communications systems.
FAQ
What is the recommended power-up sequence for SN74ALVCH16374DLR?
TI recommends tying OE pins to VCC through a pullup resistor (minimum value determined by driver sink capability) to ensure outputs remain in high-impedance during power ramp. VCC must stabilize before applying CLK or D inputs. SN74ALVCH16374DLR has no internal power-on reset, so external sequencing preserves bus integrity in multi-rail systems.
Does SN74ALVCH16374DLR support partial power-down operation?
Yes - SN74ALVCH16374DLR maintains bus-hold functionality and high-impedance outputs even when VCC drops below 1.65 V, provided VI remains within -0.5 V to VCC+0.5 V. However, guaranteed timing and drive specs apply only within 1.65–3.6 V; operation outside this range is limited to static state retention.
Can SN74ALVCH16374DLR be used as two independent 8-bit registers?
Yes - SN74ALVCH16374DLR contains two functionally identical 8-bit D-type flip-flop sections (1Q1–1Q8/1D1–1D8/1CLK/1OE and 2Q1–2Q8/2D1–2D8/2CLK/2OE), allowing independent clocking, enabling, and data loading without crosstalk or timing interaction between banks.
What is the maximum clock frequency supported by SN74ALVCH16374DLR?
SN74ALVCH16374DLR supports up to 150 MHz clock frequency at 3.3 V, as verified by timing parameters including minimum pulse width (3.3 ns), setup time (1.9 ns), and hold time (0.5 ns). Performance scales with VCC: 150 MHz is guaranteed at 2.7 V–3.6 V; derating applies below 2.5 V.
How does the bus-hold feature behave when an input is driven externally?
The bus-hold circuit in SN74ALVCH16374DLR automatically disables when an external signal drives the D input beyond VIH or below VIL thresholds. It only activates during floating or weakly biased conditions, drawing ≤75 µA (at 3 V) to maintain the last valid logic state - no conflict occurs with active drivers.
SN74ALVCH16374DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ALVCH16374DLR FAQ
1.How can I place an order for SN74ALVCH16374DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16374DLR 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 SN74ALVCH16374DLR reliable?
The price and inventory of SN74ALVCH16374DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16374DLR is usually 5 days.
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SN74ALVCH16374DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH16374DLR 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 SN74ALVCH16374DLR?
For technical support, including SN74ALVCH16374DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16374DLR requirements.
6.How does Aetrix verify that SN74ALVCH16374DLR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16374DLR 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 SN74ALVCH16374DLR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16374DLR?
All SN74ALVCH16374DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16374DLR, 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 SN74ALVCH16374DLR part is unused and in its original packaging.
Return procedure for SN74ALVCH16374DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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