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Texas Instruments 74AC16244DGGR
- Part No.:
- 74AC16244DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74AC16244DGGR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,900
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Product details
Overview
74AC16244DGGR from Texas Instruments is a 16-bit noninverting buffer/line driver with 3-state outputs, designed for memory address and bus driving in high-density digital systems. It operates from 3 V to 5.5 V, delivers ±24 mA output drive at 5 V, and features 7.1 ns typical propagation delay (A→Y) at VCC = 3.3 V. Used in industrial control backplanes and FPGA I/O expansion interfaces.
For engineers reviewing the 74AC16244DGGR datasheet, 74AC16244DGGR pinout, 74AC16244DGGR application, or 74AC16244DGGR equivalent, key selection criteria include 3-state bus contention control, TSSOP-48 thermal performance (0.85 W at 55°C), symmetrical active-low OE inputs per 4-bit group, and EPIC CMOS process latch-up immunity (500 mA at 125°C).
Technical Context
The 74AC16244DGGR implements four independent 4-bit buffer sections, each with dedicated active-low output-enable (OE) control. Its flow-through pin architecture-inputs on one side, outputs on the opposite-minimizes PCB trace crossovers and reduces signal skew across bit groups.
Distributed VCC and GND pins (eight total: four VCC, four GND) suppress simultaneous switching noise in high-speed parallel bus applications. The device uses TI's EPIC 1-μm CMOS process, enabling rail-to-rail output swing and low input capacitance (4.5 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 5.5 V - supports mixed-voltage system interfacing and legacy 5 V TTL compatibility |
| Output Drive (IOL/IOH) | ±24 mA at VCC = 4.5–5.5 V - sufficient to drive 50-pF loads across 16-bit buses without external buffering |
| Propagation Delay (tPLH/tPHL) | 1.6–7.1 ns (VCC = 5 V / 3.3 V) - enables >100 MHz bus operation with timing margin |
| Input/Output Capacitance | Ci = 4.5 pF, Co = 12 pF - minimizes capacitive loading on upstream drivers and downstream receivers |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Power Dissipation (TA = 55°C) | 0.85 W (DGG package) - defines thermal derating limit for continuous 16-bit bus activity in confined enclosures |
| Latch-Up Immunity | 500 mA at 125°C - exceeds JEDEC JESD78 Class II requirements, ensuring robustness in noisy environments |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5 mm pitch, lead-free NiPdAu finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable (per 4-bit group) | Independent control of Y1–Y4 outputs; all four OEs must be low for full 16-bit pass-through |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Noninverting data inputs | Grouped by quadrant; A1–A4 feed corresponding Y1–Y4 outputs when OE is asserted |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | 3-state buffered outputs | True (noninverted) outputs; high-impedance when respective OE is high |
| VCC (Pins 7, 14, 28, 42) | Power supply | Distributed supply pins reduce IR drop and switching noise across wide bus sections |
| GND (Pins 4, 10, 22, 34) | Ground reference | Four dedicated ground pins provide low-inductance return paths for all 16 outputs |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Input pins on left side (1–24), output pins on right side (25–48) - eliminates layer jumps and vias in dense PCB layouts |
| Distributed VCC/GND configuration | Four VCC and four GND pins interleaved across package - lowers simultaneous switching noise by >6 dB vs. single-supply-pin alternatives |
| EPIC CMOS process | 1-μm geometry with implanted wells - achieves 500 mA latch-up immunity and stable operation up to 125°C junction temperature |
| Symmetrical active-low OE inputs | Four independent OE controls (1OE–4OE), each managing four outputs - enables partial-bus gating without disabling entire 16-bit path |
| Shrink small-outline packaging | TSSOP-48 footprint occupies same PCB area as standard SOIC-24 - doubles I/O density without increasing board real estate |
Applications
| Memory Address Buffering | FPGA I/O Expansion |
|---|---|
Use Scenario: Driving 16-bit address lines from microcontroller to SRAM or Flash memory in space-constrained industrial controllers. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state outputs isolates address bus during DMA cycles and prevents contention during memory refresh. Use Value: 7.1 ns max tPHL at 3.3 V ensures setup/hold timing compliance with 25 ns access-time memories without added wait states. | Use Scenario: Extending FPGA GPIO banks to interface with legacy parallel peripherals (e.g., LCD controllers, ADCs, DACs). IC Role / Device Role / Timing Role: Bidirectional bus driver enabling FPGA to source or sink 24 mA per line while maintaining signal integrity over 10 cm traces. Use Value: Distributed VCC/GND pins suppress ground bounce during simultaneous 16-bit toggling, preserving logic thresholds under heavy load. |
| Industrial Backplane Interface | Test Equipment Signal Routing |
Use Scenario: Interfacing modular PLC I/O cards to a central backplane carrying multiplexed address/data/control signals. IC Role / Device Role / Timing Role: 3-state bus transceiver buffering address and control lines between hot-swappable modules and master controller. Use Value: ±24 mA drive strength sustains signal integrity across 15 cm backplane traces loaded with five parallel receivers (75 pF total). | Use Scenario: Routing digital stimulus/response signals between ATE instrument modules and DUT sockets in automated test handlers. IC Role / Device Role / Timing Role: Precision timing buffer providing deterministic delay (<10 ns variation) and low skew (<0.5 ns) across all 16 channels. Use Value: Flow-through layout eliminates inter-channel skew from trace-length mismatches, enabling synchronous multi-bit pattern capture at 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Lower VCC range (1.65–3.6 V); 24 mA drive only at ≤3.3 V; 3.5 ns tPHL at 3.3 V | Better suited for battery-powered or low-voltage FPGA I/O; not 5 V tolerant | Select when system operates exclusively at 3.3 V and requires faster switching than AC logic |
| 74ACT16244DGGR | Higher drive (±24 mA at 4.5–5.5 V); TTL-compatible input thresholds; identical pinout and package | Direct replacement where legacy TTL-level signaling or stronger fanout is required | Choose for 5 V systems needing guaranteed TTL input recognition and same PCB layout |
Compared with SN74LVC16244ADGGR, the 74AC16244DGGR supports full 5 V operation and higher noise margins; compared with 74ACT16244DGGR, it offers lower power consumption at standby (8 µA ICC vs. 20 µA) but slightly slower propagation at 5 V.
Availability
74AC16244DGGR is available at Aetrix Electronics and suitable for industrial control backplanes, FPGA I/O expansion, and memory subsystem buffering requiring stable component supply across extended product lifecycles.
Supply support for 74AC16244DGGR 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.
The 74AC16244DGGR belongs to TI's Widebus™ family of high-density bus interface ICs, engineered specifically to increase routing efficiency and reduce noise in memory and peripheral interconnects.
FAQ
What is the maximum operating voltage for the 74AC16244DGGR?
The 74AC16244DGGR supports a supply voltage range of 3 V to 5.5 V. Absolute maximum rating is 7 V, but sustained operation above 5.5 V violates recommended conditions and risks parametric degradation or permanent damage. All electrical characteristics-including VOH, VOL, and propagation delay-are specified and guaranteed only within the 3–5.5 V range.
Does the 74AC16244DGGR support hot insertion or live bus swapping?
The 74AC16244DGGR is not explicitly rated for hot insertion. While its 3-state outputs and high latch-up immunity (500 mA at 125°C) improve robustness, the device lacks built-in bus-hold or power-up/down protection circuitry. Safe hot-swap operation requires external current-limiting resistors, controlled ramp-up of VCC, and sequencing of OE assertion relative to supply stabilization-design practices confirmed in TI Application Report SCBA005.
How many independent output-enable controls does the 74AC16244DGGR have?
The 74AC16244DGGR has four independent active-low output-enable inputs: 1OE (Pin 1), 2OE (Pin 48), 3OE (Pin 25), and 4OE (Pin 24). Each controls a 4-bit segment (Y1–Y4 per group), allowing selective activation of subsets of the 16 outputs without affecting others-enabling partial-bus isolation in complex memory-mapped systems.
Can the 74AC16244DGGR drive a 50-pF load at 50 MHz?
Yes-the 74AC16244DGGR can reliably drive a 50-pF load at 50 MHz. With 24 mA output drive and 7.9 ns max tPHL at VCC = 5 V, it meets rise/fall time requirements (<10 ns) for 50 MHz square waves (20 ns period). TI's operating characteristics confirm 43 pF power-dissipation capacitance per latch with CL = 50 pF and f = 1 MHz, validating stability under repetitive switching.
Is the 74AC16244DGGR pin-compatible with the 74ACT16244DGGR?
Yes-the 74AC16244DGGR and 74ACT16244DGGR share identical TSSOP-48 (DGG) package dimensions, pin numbering, and functional pin assignments. Both devices use the same flow-through architecture and OE/A/Y mapping. However, ACT variants feature TTL-compatible input thresholds, while AC variants use CMOS thresholds-requiring verification of upstream driver compatibility before substitution.
74AC16244DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74AC16244DGGR FAQ
1.How can I place an order for 74AC16244DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC16244DGGR 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 74AC16244DGGR reliable?
The price and inventory of 74AC16244DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC16244DGGR is usually 5 days.
3.What payment methods are accepted for 74AC16244DGGR?
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4.How is shipping managed for 74AC16244DGGR?
74AC16244DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC16244DGGR 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 74AC16244DGGR?
For technical support, including 74AC16244DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC16244DGGR requirements.
6.How does Aetrix verify that 74AC16244DGGR is sourced from the original manufacturer or authorized distributors?
All 74AC16244DGGR 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 74AC16244DGGR meets industry standards.
7.What is the process for return or replacement of 74AC16244DGGR?
All 74AC16244DGGR units undergo pre-shipment inspection (PSI). If there is an issue with 74AC16244DGGR, 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 74AC16244DGGR part is unused and in its original packaging.
Return procedure for 74AC16244DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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