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Texas Instruments SN74AVC16374DGG
- Part No.:
- SN74AVC16374DGG
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74AVC16374DGG.pdf
- Description:
- BUS DRIVER, AVC SERIES, 8-BIT,
- Quantity:
- Payment:
- Shipping:
Inventory:14,470
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Product details
Overview
SN74AVC16374 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 and featuring Dynamic Output Control (DOC) circuitry, ±24 mA dynamic drive at 2.5 V, and Ioff support for partial-power-down mode. It serves as a bidirectional bus driver or buffer register in mixed-voltage data interfaces.
For engineers reviewing the SN74AVC16374 datasheet, SN74AVC16374 pinout, SN74AVC16374 application, or SN74AVC16374 equivalent, key selection criteria include its 48-pin TSSOP (DGG) package, dual 8-bit independent clocking, 3.3 ns propagation delay at 3.3 V, and overvoltage-tolerant I/O enabling interoperability across 1.2–3.6 V domains.
Technical Context
This device implements a DOC circuit that dynamically lowers output impedance during signal transitions to deliver ±24 mA peak drive-matching high-drive standard outputs-then raises impedance to suppress switching noise without speed penalty. Its EPIC submicron CMOS process enables operation from –40°C to 85°C with latch-up immunity exceeding 100 mA per JESD 78 Class II.
The SN74AVC16374 supports two independent 8-bit sections (1CLK/1OE and 2CLK/2OE), each with eight D inputs, eight Q outputs, and separate 3-state control. OE pins disable outputs to high-impedance without affecting internal state retention or clock/data sampling behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V operational; 1.2 V minimum for data retention - enables low-power standby while preserving register state |
| Propagation Delay (tpd) | 3.3 ns max at VCC = 3.3 V - supports >200 MHz clock frequency in high-speed bus buffering |
| Dynamic Drive Strength | ±24 mA at 2.5 V VCC - drives heavy capacitive loads (e.g., 30 pF buses) without external buffers |
| Ioff Current | ±10 µA max at VI/VO = 3.6 V - prevents backflow current during partial power-down, protecting powered-down subsystems |
| Input Voltage Tolerance | –0.5 V to 4.6 V - allows safe interfacing with higher-voltage logic (e.g., 5 V tolerant inputs on 1.8 V system) |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
| Static Output Current (IOLS/IOHS) | ±12 mA at VCC = 3.3 V - sufficient for driving multiple LVTTL/LVCMOS loads directly |
Pinout & Package
SN74AVC16374 is housed in a 48-pin Plastic Thin Shrink Small-Outline (DGG) package, 12.5 mm × 6.1 mm × 1.2 mm, with 0.5 mm lead pitch and exposed pad not present. Pin numbering follows standard TSSOP top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output Enable (active-low) | Independent 3-state control for each 8-bit section; high-impedance output when asserted, no effect on internal flip-flop state |
| 1CLK, 2CLK | Clock input (positive-edge triggered) | Samples D inputs on rising edge; asynchronous reset not supported - synchronous register behavior only |
| 1D1–1D8, 2D1–2D8 | Data inputs | 16-bit parallel data inputs; overvoltage-tolerant up to 4.6 V - compatible with mixed-supply systems |
| 1Q1–1Q8, 2Q1–2Q8 | Registered outputs | Edge-triggered latched outputs; drive strength and noise suppression governed by DOC circuitry |
| VCC (pins 7, 18, 29, 40) | Power supply | Four dedicated VCC pins reduce IR drop and improve noise immunity across wide bus; decoupling required per pin |
| GND (pins 4, 10, 15, 21, 31, 34, 42, 45) | Ground | Eight GND pins provide low-inductance return paths for all 16 outputs and internal logic - critical for signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output Control (DOC) | Reduces simultaneous switching noise by modulating output impedance mid-transition - eliminates need for series resistors or ferrites |
| Mixed-Voltage Interface Support | Inputs/outputs tolerate –0.5 V to 4.6 V regardless of VCC - enables direct connection between 1.8 V, 2.5 V, and 3.3 V domains without level shifters |
| Partial-Power-Down Capability (Ioff) | Blocks current flow when VCC = 0 V - permits hot insertion/removal and safe operation in multi-rail systems with staggered power sequencing |
| Dual Independent 8-Bit Sections | Two separate clock and output-enable controls allow asynchronous latching of different data groups - simplifies timing-critical bus arbitration logic |
| Low Input/Output Capacitance | CI = 2.5–3 pF, CO = 6.5 pF - minimizes loading on driving sources and reduces trace crosstalk in dense PCB layouts |
Applications
| Memory Interface Buffering | PCI Express Gen1 Sideband Signal Latching |
|---|---|
|
Use Scenario: Isolating address/data lines between SoC and DDR SDRAM to absorb timing skew and reduce fanout load. IC Role / Device Role / Timing Role: Edge-triggered register holding stable address values during memory access cycles; 3-state outputs isolate bus during refresh or precharge. Use Value: Enables reliable 200+ MHz memory bus operation using single-cycle setup/hold margins, eliminating need for discrete bus hold circuits. |
Use Scenario: Capturing PCIe reference clock enable, power management request, or link training status signals before ASIC configuration completes. IC Role / Device Role / Timing Role: Synchronizing asynchronous sideband control signals to local domain clock; OE-controlled tristate isolates signals during hot-plug events. Use Value: Prevents metastability-induced glitches on critical PCIe management lines, ensuring robust link initialization under variable power-up sequencing. |
| Industrial I/O Expansion Module | Automotive Body Control Unit Data Multiplexing |
|
Use Scenario: Extending microcontroller GPIO count to drive 16-channel relay or LED arrays via shared SPI/I²C interface with parallel latch. IC Role / Device Role / Timing Role: Parallel-to-parallel latch receiving data from serial interface controller; 3-state outputs prevent contention during data reload. Use Value: Reduces BOM cost versus dedicated I/O expanders by leveraging existing MCU peripherals and eliminating software overhead for bit-banged I/O. |
Use Scenario: Consolidating door lock, window lift, and mirror position sensor data from multiple LIN nodes onto a CAN-connected master ECU. IC Role / Device Role / Timing Role: Synchronizing asynchronous sensor reports into time-aligned 16-bit frames; Ioff protection safeguards CAN transceiver during battery disconnect events. Use Value: Ensures deterministic data capture across varying vehicle power states, meeting ISO 16750-2 transient immunity requirements without additional isolation components. |
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 |
|---|---|---|---|
| SN74LVC16374DGGR | No DOC circuit; static ±24 mA drive only; lower max fclock (160 MHz); identical DGG package and pinout | Lacks dynamic noise suppression - requires careful layout and termination for >100 MHz operation | Select when cost sensitivity outweighs noise margin needs and clock rates stay below 160 MHz |
| 74AVC16374TTR | Same DOC and electrical specs; TSSOP-48 package with 0.65 mm pitch (not 0.5 mm); different thermal resistance (θJA = 75°C/W) | Requires PCB footprint redesign; slightly higher thermal impedance limits sustained high-current operation | Choose only if legacy board uses STMicro's TTR footprint or TI DGG stock is unavailable |
Compared with SN74LVC16374DGGR and 74AVC16374TTR, the SN74AVC16374 delivers superior noise immunity at 200 MHz operation due to DOC, maintains identical pin compatibility with the LVC variant, and offers optimal thermal performance in the industry-standard 0.5 mm-pitch DGG package.
Availability
SN74AVC16374 is available at Aetrix Electronics and suitable for industrial I/O expansion, memory interface buffering, PCIe sideband signal conditioning, and automotive body control unit designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AVC16374 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 expertise in high-reliability interface and timing products.
The SN74AVC16374 belongs to TI's AVC (Advanced Very-Low-Voltage CMOS) logic family, engineered for ultra-low-voltage, high-speed, mixed-signal interfacing in portable, industrial, and automotive systems where power efficiency and noise resilience are critical.
FAQ
What is the minimum VCC required for data retention in SN74AVC16374?
The SN74AVC16374 retains stored data down to VCC = 1.2 V, as specified in the recommended operating conditions table. This allows the device to maintain register state during brown-out conditions or low-power sleep modes without external backup power. Below 1.2 V, data retention is not guaranteed, and the SN74AVC16374 may lose its latched values.
Does SN74AVC16374 support true 5-V tolerant inputs?
No, the SN74AVC16374 does not support 5-V tolerant inputs. Its absolute maximum input voltage is 4.6 V, and it is rated for mixed-voltage operation up to 3.6 V VCC. While it accepts inputs up to 4.6 V safely, connecting to a true 5-V logic source exceeds specification limits and risks reliability degradation. For 5-V interface, level-shifting circuitry is required.
Can SN74AVC16374 be used as two independent 8-bit registers?
Yes, the SN74AVC16374 is explicitly structured as two independent 8-bit D-type flip-flops: one controlled by 1CLK and 1OE, the other by 2CLK and 2OE. Each section operates autonomously - clocks and output enables are fully decoupled - allowing asynchronous latching of different data streams without interference. This architecture is confirmed in the functional table and terminal assignments.
How does the Dynamic Output Control (DOC) circuit in SN74AVC16374 reduce noise?
The DOC circuit in SN74AVC16374 dynamically modulates output impedance: it lowers impedance at signal transition onset to deliver full ±24 mA drive, then raises impedance mid-transition to suppress ringing and ground bounce. This achieves high-speed edge fidelity without external damping components - unlike fixed-drive devices that require series resistors to meet EMI targets.
Is SN74AVC16374 pin-compatible with SN74ALVC16374?
No, SN74AVC16374 is not pin-compatible with SN74ALVC16374. Although both are 48-pin TSSOP 16-bit D flip-flops, the ALVC variant uses different pin assignments for VCC and GND (e.g., ALVC places VCC at pins 24/48, while AVC uses pins 7/18/29/40). Interchanging them would cause power and ground misconnections, risking device damage.
SN74AVC16374DGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74AVC16374DGG FAQ
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7.What is the process for return or replacement of SN74AVC16374DGG?
All SN74AVC16374DGG units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC16374DGG, 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 SN74AVC16374DGG part is unused and in its original packaging.
Return procedure for SN74AVC16374DGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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