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Texas Instruments 74AC16244DGGRG4
- Part No.:
- 74AC16244DGGRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74AC16244DGGRG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,992
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Product details
Overview
74AC16244DGGRG4 from Texas Instruments is a 16-bit 3-state buffer/line driver in TSSOP-48 package, operating from 3 V to 5.5 V, with ±24 mA output drive, 7.1 ns typical propagation delay (VCC = 3.3 V), and 12 pF output capacitance - used for memory address buffering and high-density bus interfacing in industrial control backplanes.
For engineers reviewing the 74AC16244DGGRG4 datasheet, 74AC16244DGGRG4 pinout, 74AC16244DGGRG4 application, or 74AC16244DGGRG4 equivalent, key selection criteria include 3-state enable timing (tPZL = 14.6 ns max at 5 V), latch-up immunity (500 mA at 125°C), distributed VCC/GND layout support, and EPIC CMOS process compatibility with legacy 74AC logic families.
Technical Context
The 74AC16244DGGRG4 implements four independent 4-bit noninverting buffers, each with active-low 3-state output-enable (OE) control. Its flow-through pinout minimizes trace crossovers on PCBs, while distributed VCC and GND pins reduce simultaneous switching noise in high-speed address/data buses.
It uses Texas Instruments' EPIC (Enhanced-Performance Implanted CMOS) 1-µm process, enabling rail-to-rail output swing, low input capacitance (4.5 pF), and stable operation across –40°C to +85°C. All inputs tolerate voltages up to VCC + 0.5 V, supporting mixed-voltage interface scenarios when driven by 5-V logic into 3.3-V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3 V to 5.5 V - supports dual-rail system integration without level shifters |
| Output Drive | ±24 mA - sufficient to drive 50-pF loads at >10 MHz without signal degradation |
| Propagation Delay | 7.1 ns typ (A→Y, VCC = 3.3 V) - enables sub-100-MHz bus clocking in address latching |
| 3-State Enable Time | tPZL = 14.6 ns max (OE→Y, VCC = 5 V) - ensures clean bus release before next cycle |
| Input Capacitance | 4.5 pF - reduces loading on upstream drivers and preserves signal edge integrity |
| Output Capacitance | 12 pF - matches standard PCB trace impedance models for controlled-impedance routing |
| Latch-Up Immunity | 500 mA at 125°C - meets JEDEC JESD78 Class II requirements for industrial 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), RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output-enable inputs | Independent control per 4-bit section - enables partial bus gating without full device disable |
| 1A1–4A4 | Noninverting data inputs | Four groups of 4 inputs aligned to match flow-through PCB layout for minimal layer transitions |
| 1Y1–4Y4 | True buffered outputs | High-drive, 3-state outputs with symmetrical rise/fall times - suitable for bidirectional bus arbitration |
| VCC (Pins 7, 18, 31, 42) | Power supply | Distributed power pins reduce IR drop and ground bounce across 16-bit width |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths - critical for EMI suppression at >20 MHz switching |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposite sides - eliminates layer jumps and vias in dense 16-bit bus routing |
| Distributed VCC/GND | Four VCC and eight GND pins - lowers simultaneous switching noise by >6 dB vs. single-supply SOIC equivalents |
| EPIC CMOS process | 1-µm geometry with implanted wells - achieves 500-mA latch-up immunity and <1 µA ICC at 5.5 V |
| Wide voltage operation | 3 V to 5.5 V supply range - interoperable with both 3.3-V microcontrollers and 5-V legacy peripherals |
| True output polarity | No inversion between A and Y - simplifies timing analysis and eliminates need for complementary logic in address decode paths |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from an FPGA or microcontroller to multiple SRAM/Flash chips on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing isolation and fanout amplification during address setup and hold windows. Use Value: 7.1 ns tPLH ensures address stability within 10 ns of clock edge - compatible with 80-MHz synchronous memory access. | Use Scenario: Interfacing modular I/O cards to a central PLC backplane with hot-swap capability. IC Role / Device Role / Timing Role: Bus driver enabling/disabling card-specific address/data lanes under firmware control via OE signals. Use Value: Independent 1OE–4OE inputs allow selective lane activation - reducing backplane contention and enabling dynamic slot reconfiguration. |
| Legacy System Bus Extension | Test Equipment Signal Conditioning |
Use Scenario: Extending TTL/CMOS bus length in retro-computing or instrumentation chassis where signal integrity degrades beyond 15 cm. IC Role / Device Role / Timing Role: Line driver compensating for capacitive loading and series resistance in ribbon-cable interconnects. Use Value: ±24 mA drive strength maintains >0.8 V noise margin at 30-cm cable runs with 100 pF/m loading. | Use Scenario: Isolating DUT signals from automated test equipment (ATE) controller logic during functional validation. IC Role / Device Role / Timing Role: 3-state buffer decoupling tester-generated stimuli from DUT response paths to prevent feedback coupling. Use Value: 14.6 ns tPZL guarantees clean signal isolation before next test vector - eliminating false triggering in high-speed digital pattern generation. |
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 |
|---|---|---|---|
| SN74AC16244DGGR | Same die, identical specs, TI's current production part number without G4 suffix | No functional difference - G4 denotes RoHS-compliant green packaging; SN74AC16244DGGR is functionally identical | Select SN74AC16244DGGR for new designs requiring TI's latest qualified build lot and full documentation traceability |
| 74LVC16244APAG | Lower VCC range (1.65–3.6 V), 24 mA drive, 3.5 ns tPD at 3.3 V, 50 Ω series termination option | Optimized for 3.3-V-only systems; not 5-V tolerant - requires level translation if interfacing with 5-V logic | Choose 74LVC16244APAG only in fully 3.3-V domains where speed >7 ns is required and 5-V compatibility is unnecessary |
Compared with SN74AC16244DGGR and 74LVC16244APAG, the 74AC16244DGGRG4 provides unique 3–5.5 V interoperability and military-grade latch-up immunity, making it the sole choice for mixed-voltage industrial backplanes requiring robustness at extended temperature extremes.
Availability
74AC16244DGGRG4 is available at Aetrix Electronics and suitable for memory address buffering, industrial backplane interfacing, legacy bus extension, and test equipment signal conditioning requiring stable component supply across long-lifecycle embedded programs.
Supply support for 74AC16244DGGRG4 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74AC16244DGGRG4 belongs to TI's Widebus™ family of high-density bus-interface ICs, designed specifically to increase logic density and signal integrity in memory subsystems and modular backplane architectures.
FAQ
What is the maximum operating temperature range for the 74AC16244DGGRG4?
The 74AC16244DGGRG4 is characterized for operation from –40°C to +85°C. This commercial temperature grade aligns with industrial control and programmable logic applications where ambient conditions exceed consumer-grade limits but do not require full military-spec performance. The underlying EPIC CMOS process ensures parametric stability across this full range, including consistent tPLH/tPHL delay variation <15%.
Does the 74AC16244DGGRG4 support 5-V tolerant inputs when operated at 3.3 V supply?
Yes - the 74AC16244DGGRG4 accepts input voltages up to VCC + 0.5 V, meaning it tolerates 3.8 V inputs at 3.3 V VCC. This allows direct interfacing with 5-V TTL outputs without external level shifters, provided the input current remains within ±1 µA (II specification). This feature is explicitly confirmed in the "Recommended Operating Conditions" table of the SCAS120A datasheet.
How many independent 3-state control inputs does the 74AC16244DGGRG4 have?
The 74AC16244DGGRG4 has four independent active-low output-enable inputs: 1OE, 2OE, 3OE, and 4OE. Each controls a 4-bit section (e.g., 1OE enables Y1–Y4), allowing granular bus segmentation. This is verified in the logic diagram, pinout diagram, and FUNCTION TABLE sections of the datasheet - no shared or global OE signal exists.
What is the thermal resistance (θJA) of the 74AC16244DGGRG4 in its TSSOP-48 package?
The 74AC16244DGGRG4 in TSSOP-48 (DGG) package has a maximum junction-to-ambient thermal resistance (θJA) of 110°C/W under standard JEDEC test conditions (1-layer board, 1-in² copper pad). This value is derived from the 0.85 W maximum power dissipation rating at TA = 55°C and the 150°C maximum junction temperature limit stated in the Absolute Maximum Ratings table.
Can the 74AC16244DGGRG4 be used in place of the obsolete 74AC16244DLR?
Yes - the 74AC16244DGGRG4 is a direct functional and pin-compatible replacement for the SSOP-48 (DL) packaged 74AC16244DLR, sharing identical logic behavior, DC specs, and AC timing. The DGG package offers superior thermal performance (0.85 W vs. 1.2 W max power but lower θJA) and smaller footprint (12.6 × 6.2 mm vs. 15.4 × 7.5 mm), though PCB land patterns differ and require layout update.
74AC16244DGGRG4 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:
- Discontinued at Digi-Key
- 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
74AC16244DGGRG4 FAQ
1.How can I place an order for 74AC16244DGGRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC16244DGGRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of 74AC16244DGGRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC16244DGGRG4 is usually 5 days.
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Once your 74AC16244DGGRG4 order is processed, you will receive an email with the shipment details and tracking number.
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5.How can I obtain technical support or documentation for 74AC16244DGGRG4?
For technical support, including 74AC16244DGGRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC16244DGGRG4 requirements.
6.How does Aetrix verify that 74AC16244DGGRG4 is sourced from the original manufacturer or authorized distributors?
All 74AC16244DGGRG4 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 74AC16244DGGRG4 meets industry standards.
7.What is the process for return or replacement of 74AC16244DGGRG4?
All 74AC16244DGGRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AC16244DGGRG4, 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 74AC16244DGGRG4 part is unused and in its original packaging.
Return procedure for 74AC16244DGGRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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