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Texas Instruments 74AC16374DL
- Part No.:
- 74AC16374DL
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74AC16374DL.pdf
- Description:
- IC FF D-TYPE DUAL 8BIT 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
74AC16374DL from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for high-capacitance bus driving in industrial I/O ports and bidirectional data buffers. It operates across –40°C to 85°C, supports 3–5.5 V supply, delivers 24 mA output drive at 5 V, and achieves 100 MHz max clock frequency with 5 ns minimum pulse width.
For engineers reviewing the 74AC16374DL datasheet, 74AC16374DL pinout, 74AC16374DL application, or 74AC16374DL equivalent, this page provides verified functional identity, DL-package pin mapping, timing behavior under 3 V and 5 V operation, latch-up immunity (500 mA at 125°C), and direct alternatives for 16-bit registered bus interface designs.
Technical Context
The 74AC16374DL implements two independent 8-bit D-flip-flop sections (1CLK/1D–1Q and 2CLK/2D–2Q), each with dedicated output-enable (1OE/2OE) controlling eight 3-state outputs. Its flow-through architecture places inputs on one side and outputs on the opposite side to minimize trace crossovers on PCBs.
Distributed VCC and GND pins (eight total) reduce simultaneous switching noise, while EPIC™ 1-µm CMOS process ensures 500-mA latch-up immunity and compatibility with TTL input thresholds (VIL = 1.65 V, VIH = 3.85 V at VCC = 5.5 V). OE control is asynchronous and does not affect internal state retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC), TTL-compatible input thresholds |
| Function | 16-bit edge-triggered D-type flip-flop with dual 3-state output banks |
| Supply Voltage Range | 3 V to 5.5 V - supports mixed-voltage system interfacing |
| Max Clock Frequency | 100 MHz at VCC = 5 V - enables high-speed register staging in data paths |
| Output Drive | ±24 mA at VCC = 5 V - drives 50-pF loads with <11 ns propagation delay |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments |
| Latch-Up Immunity | 500 mA typical at 125°C - meets JEDEC JESD78 Class II requirements |
Pinout & Package
74AC16374DL uses a 48-pin shrink small-outline package (SSOP-DL, 300-mil width, 25-mil pin pitch), optimized for high I/O density in space-constrained industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output enable (active-low) | Asynchronously places respective 8-bit output bank into high-Z; no effect on internal flip-flop state |
| 1CLK, 2CLK | Positive-edge clock input | Triggers parallel loading of 1D1–1D8 or 2D1–2D8 into corresponding Q outputs |
| 1D1–1D8, 2D1–2D8 | Data inputs | 16-bit parallel data path; latched on rising CLK edge |
| 1Q1–1Q8, 2Q1–2Q8 | 3-state outputs | Driven low/high or high-impedance based on OE and stored state; isolated from bus when disabled |
| VCC (Pins 7, 18, 29, 40) | Power supply | Distributed VCC pins reduce IR drop and switching noise across 16-bit bus |
| GND (Pins 4, 10, 15, 21, 26, 31, 37, 43) | Ground reference | Eight GND pins provide low-inductance return paths for all 16 outputs and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input pins on left/right edges and outputs on opposite side - eliminates layer jumps and vias in dense bus routing |
| Dual independent OE controls | Enables selective 8-bit bus gating without affecting adjacent channel timing or state |
| EPIC™ 1-µm CMOS process | Delivers 100 MHz operation with sub-10 ns tPLH/tPHL and 500 mA latch-up immunity |
| Distributed power/ground | Four VCC and eight GND pins suppress simultaneous switching noise in multi-bit applications |
| 3-state output isolation | Outputs draw <5 µA in high-Z mode - prevents bus contention and signal corruption during arbitration |
Applications
| Industrial I/O Expansion | Memory Address Latching |
|---|---|
Use Scenario: Adding parallel digital I/O capability to PLC backplanes or motor controller modules using shared data buses. IC Role / Device Role / Timing Role: Acts as a buffered, clock-synchronized 16-bit I/O port with independent output gating per byte. Use Value: Enables deterministic read/write timing via edge-triggered capture and eliminates bus contention through 3-state control during idle cycles. |
Use Scenario: Capturing and holding 16-bit memory address lines between microcontroller and external SRAM or flash devices. IC Role / Device Role / Timing Role: Serves as an address latch that freezes address values during multiplexed bus cycles. Use Value: Guarantees stable address presentation during memory access windows with <5 ns setup/hold margins at 100 MHz clock rates. |
| Bidirectional Data Bus Interface | Test Equipment Signal Conditioning |
Use Scenario: Isolating and direction-controlling 16-bit data paths between FPGA and legacy peripheral ASICs in ATE systems. IC Role / Device Role / Timing Role: Functions as a dual-gated transceiver buffer, where OE signals manage data flow direction and timing alignment. Use Value: Provides precise edge-aligned data transfer with <11 ns propagation delay and zero hold-time requirement, simplifying timing closure. |
Use Scenario: Driving calibrated test signals onto high-capacitance probe fixtures or cable assemblies in automated test rigs. IC Role / Device Role / Timing Role: Delivers clean, slew-controlled logic transitions to 50–100 pF loads without ringing or overshoot. Use Value: Maintains signal integrity up to 100 MHz with 24 mA drive strength and distributed VCC/GND layout minimizing ground bounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit registered bus interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AC16374DGGR | Same AC logic family, identical function and timing, but in 48-pin TSSOP (DGG) package with 0.5-mm pitch | TSSOP offers better thermal dissipation and reflow compatibility for fine-pitch assembly; DL has tighter board area footprint | Select SN74AC16374DGGR for automated optical inspection (AOI) compatibility and higher thermal margin; choose 74AC16374DL for maximum I/O density in constrained layouts. |
| 74LVC16374ADL | Lower voltage operation (1.65–3.6 V), reduced drive (±24 mA at 3.3 V), and 3.3-V-only I/O thresholds | Not interoperable with 5-V systems; requires level-shifting when interfacing with legacy 5-V peripherals | Choose 74LVC16374ADL only in pure 3.3-V domains; retain 74AC16374DL for mixed-voltage or 5-V industrial backplanes. |
Compared with SN74AC16374DGGR and 74LVC16374ADL, the 74AC16374DL uniquely balances 5-V tolerance, industrial temperature range, SSOP-DL footprint efficiency, and proven latch-up robustness-making it the preferred choice for legacy-compatible, space-limited, high-noise industrial bus interfaces.
Availability
74AC16374DL is available at Aetrix Electronics and suitable for industrial I/O expansion, memory address latching, bidirectional data bus interfacing, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AC16374DL 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets since 1930.
The 74AC16374DL belongs to TI's Widebus™ family of high-speed, high-drive bus interface ICs, engineered specifically for noise-immune, high-density PCB implementations in industrial control and instrumentation systems.
FAQ
What is the maximum clock frequency supported by the 74AC16374DL?
The 74AC16374DL supports a maximum clock frequency of 100 MHz when operated at VCC = 5 V and TA = 25°C. At 3.3 V, the maximum clock rate drops to 60 MHz. These values are guaranteed under recommended operating conditions and reflect the device's propagation delay (tPLH/tPHL ≤ 10.8 ns at 5 V) and minimum pulse width (tw ≥ 5 ns).
Does the 74AC16374DL require external pull-up or pull-down resistors on its control inputs?
No, the 74AC16374DL does not require external pull-up or pull-down resistors on CLK, OE, or D inputs. Its Advanced CMOS (AC) inputs have TTL-compatible thresholds and sufficient input hysteresis to prevent floating-state oscillation. However, TI recommends tying unused inputs directly to VCC or GND per datasheet Note 3 to ensure deterministic operation.
Can the 74AC16374DL be used as two independent 8-bit registers?
Yes, the 74AC16374DL is explicitly structured as two independent 8-bit D-type flip-flop sections: one controlled by 1CLK and 1OE (pins 47, 1), and the other by 2CLK and 2OE (pins 25, 24). Each section latches its respective D inputs on the rising edge of its clock and gates its Q outputs independently - enabling true dual-register operation without cross-talk.
What is the power dissipation of the 74AC16374DL under typical operating conditions?
At VCC = 5 V and TA = 25°C, the 74AC16374DL exhibits a typical power dissipation capacitance (Cpd) of 49 pF per flip-flop when outputs are enabled and 32 pF when disabled. With all 16 outputs active at 1 MHz and 50-pF load, total dynamic power is approximately 12 mW - well within the DL package's 1.2 W maximum rating at 55°C ambient.
Is the 74AC16374DL pin-compatible with the 54AC16374WD military-grade variant?
No, the 74AC16374DL is not pin-compatible with the 54AC16374WD. While both share identical logic functionality and pin functions, the 54AC16374WD uses a 48-pin ceramic flat package (WD) with 25-mil pitch but different mechanical dimensions and land pattern requirements. The 74AC16374DL uses a plastic SSOP-DL package - same pin count and pitch, but distinct footprint and soldering profile.
74AC16374DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 9.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 3V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74AC16374DL FAQ
1.How can I place an order for 74AC16374DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC16374DL 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 74AC16374DL reliable?
The price and inventory of 74AC16374DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC16374DL is usually 5 days.
3.What payment methods are accepted for 74AC16374DL?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC16374DL?
74AC16374DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC16374DL 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 74AC16374DL?
For technical support, including 74AC16374DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC16374DL requirements.
6.How does Aetrix verify that 74AC16374DL is sourced from the original manufacturer or authorized distributors?
All 74AC16374DL 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 74AC16374DL meets industry standards.
7.What is the process for return or replacement of 74AC16374DL?
All 74AC16374DL units undergo pre-shipment inspection (PSI). If there is an issue with 74AC16374DL, 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 74AC16374DL part is unused and in its original packaging.
Return procedure for 74AC16374DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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