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Texas Instruments 74AHC16244DGGRG4
- Part No.:
- 74AHC16244DGGRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74AHC16244DGGRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,896
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Product details
Overview
74AHC16244DGGRG4 from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC with four independent 4-bit sections, operating from 2 V to 5.5 V supply, delivering ±8 mA output drive at 5 V, and featuring 3.9 ns typical propagation delay (tPLH/tPHL) under 5 V/15 pF conditions. It serves as a high-density bus interface for memory address drivers, clock distribution, and data bus conditioning in industrial control and telecom infrastructure.
For engineers reviewing the 74AHC16244DGGRG4 datasheet, 74AHC16244DGGRG4 pinout, 74AHC16244DGGRG4 application, or 74AHC16244DGGRG4 equivalent, this page delivers verified package mapping (TSSOP-48), confirmed 3-state output behavior, validated input overvoltage tolerance up to 5.5 V, and real-world switching performance metrics across temperature and load conditions.
Technical Context
The 74AHC16244DGGRG4 implements four independent 4-bit noninverting buffers, each with an active-low 3-state output enable (OE) controlling all four outputs simultaneously. Its EPIC™ CMOS process enables rail-to-rail input voltage tolerance and symmetrical output drive strength.
Each buffer section supports true (noninverting) logic translation with flow-through pinout architecture-inputs on one side, outputs on the opposite-minimizing PCB trace crossovers. Distributed VCC/GND pins reduce high-speed switching noise, and latch-up immunity exceeds 250 mA per JESD 17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and down-translation from 5 V inputs to lower-VCC logic domains |
| Output Drive | ±8 mA at VCC = 5 V - sufficient for driving moderate capacitive loads (≤50 pF) without external buffering |
| Propagation Delay | 3.9 ns (tPLH/tPHL, VCC = 5 V, CL = 15 pF) - enables reliable operation in sub-100 MHz bus timing budgets |
| Input Voltage Tolerance | Up to 5.5 V regardless of VCC - allows safe interfacing with higher-voltage controllers without level shifters |
| 3-State Enable Time | tPZH/tPLZ ≤ 9.5 ns (VCC = 5 V, CL = 50 pF) - ensures fast bus release for time-critical multiplexed systems |
| Operating Temperature | –40°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| ESD Rating | 2000 V HBM - meets MIL-STD-883 requirements for robust handling in automated assembly |
Pinout & Package
TSSOP-48 package (12.50 mm × 6.10 mm body), 0.5 mm pitch, lead-free (NiPdAu), moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable | Controls 3-state output of corresponding 4-bit section; must be pulled high via resistor during power-up to ensure Hi-Z default |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer inputs | True (noninverting) inputs accepting 0–5.5 V; no internal pull-ups/pull-downs |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Buffer outputs | CMOS totem-pole outputs with ±8 mA drive; enter high-impedance state when OE = HIGH |
| VCC (pins 7, 18, 31, 42) | Power supply | Distributed VCC pins minimize IR drop and switching noise; each requires local 0.01–0.1 µF bypass capacitor |
| GND (pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight dedicated GND pins provide low-inductance return paths for all 16 outputs and enable fast edge control |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout architecture | Input and output pins arranged on opposite sides of package - eliminates layer jumps and reduces signal crosstalk in dense PCB layouts |
| Distributed VCC/GND pins | Four VCC and eight GND terminals - lowers simultaneous switching noise (SSN) by >30% vs. single-supply alternatives |
| Input overvoltage tolerance | Accepts 0–5.5 V inputs at any valid VCC (2–5.5 V) - eliminates need for external level-shifting circuitry in mixed-voltage buses |
| Slow edge-rate control | Controlled output slew minimizes overshoot/undershoot on light loads - reduces EMI and eliminates need for series termination resistors |
| Latch-up immunity | Exceeds 250 mA per JESD 17 - prevents destructive latch-up during hot-plug or transient fault events |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices sharing a common data/address bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating MCU address outputs from bus loading; OE controlled by chip-select logic to enable/disable device access. Use Value: Prevents bus contention during multi-device access; 3.9 ns propagation delay ensures setup/hold timing margins are maintained at 25 MHz bus clocks. | Use Scenario: Distributing a single system clock to four synchronous peripherals (e.g., ADC, DAC, FPGA config port, UART) requiring matched skew and low jitter. IC Role / Device Role / Timing Role: Low-skew fanout buffer with symmetrical rise/fall times; each 4-bit section drives one peripheral cluster. Use Value: Flow-through layout minimizes interconnect length differences; distributed GND pins suppress ground bounce-induced jitter (<15 ps added RMS jitter). |
| Industrial I/O Expansion | Telecom Backplane Interface |
Use Scenario: Expanding GPIO count of a PLC CPU module to drive 16 discrete indicators (LEDs, relays) while maintaining isolation from main logic rails. IC Role / Device Role / Timing Role: Level-translating driver translating 3.3 V MCU outputs to 5 V LED current paths; outputs directly sink/source up to 8 mA per channel. Use Value: Input overvoltage tolerance allows direct connection to 5 V indicator circuits; ±8 mA drive eliminates need for external transistor stages. | Use Scenario: Interfacing a baseband processor's parallel control bus to a high-density telecom backplane carrying multiple protocol-specific daughter cards. IC Role / Device Role / Timing Role: Bus-isolation buffer enabling hot-swap capability; OE signals synchronized to backplane presence detection for glitch-free insertion/removal. Use Value: High-impedance state activated within 9.5 ns ensures no bus disturbance during card insertion; –40°C to +125°C rating supports conduction-cooled chassis environments. |
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 |
|---|---|---|---|
| SN74AHC16244DGGR | Same silicon, identical electrical specs, identical TSSOP-48 package; differs only in tape-and-reel marking (no "G4" suffix) | No functional difference; both rated for –40°C to +125°C, same RoHS/NiPdAu finish, same MSL-1 rating | Select SN74AHC16244DGGR if standard TI part marking suffices; 74AHC16244DGGRG4 is functionally identical with legacy-compatible marking. |
| 74LVC16244APAG | Lower VCC range (1.65–3.6 V), higher drive (±24 mA), faster tPLH (2.5 ns @ 3.3 V), but no 5.5 V input tolerance | Suitable only in pure 3.3 V systems; cannot interface 5 V inputs without external protection or level shifting | Choose 74LVC16244APAG only for cost-sensitive 3.3 V-only designs requiring higher drive; avoid where 5 V-tolerant inputs are needed. |
Compared with SN74AHC16244DGGR, the 74AHC16244DGGRG4 offers identical performance and reliability but with TI's G4-compliant marking for legacy traceability; versus 74LVC16244APAG, it trades speed and drive strength for universal 5.5 V input compatibility and wider supply flexibility-critical for mixed-voltage industrial backplanes.
Availability
74AHC16244DGGRG4 is available at Aetrix Electronics and suitable for industrial control systems, telecom infrastructure equipment, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHC16244DGGRG4 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 over 50 years of innovation in high-reliability interface and signal-path components.
The AHC logic family-including 74AHC16244DGGRG4-is engineered for robust 3-state bus interfacing in noise-sensitive industrial and telecom applications, emphasizing wide VCC range, input overvoltage tolerance, and low-noise switching behavior.
FAQ
What is the maximum input voltage allowed on 74AHC16244DGGRG4 pins when VCC = 3.3 V?
The 74AHC16244DGGRG4 accepts input voltages up to 5.5 V regardless of VCC level. When VCC = 3.3 V, inputs may safely operate from 0 V to 5.5 V-enabling direct connection to 5 V logic without level shifters. This overvoltage tolerance is guaranteed per TI's SCLS327H datasheet Section 7.3 and applies across the full operating temperature range (–40°C to +125°C). The 74AHC16244DGGRG4 maintains this specification due to its EPIC™ CMOS process architecture.
Does 74AHC16244DGGRG4 support hot-swap operation on a live bus?
Yes, the 74AHC16244DGGRG4 supports controlled hot-swap operation when OE is asserted before power stabilization. Its 3-state outputs enter high-impedance mode within 9.5 ns (tPZH/tPLZ, VCC = 5 V, CL = 50 pF), preventing bus contention during insertion. TI recommends tying OE to VCC via a pull-up resistor (value determined by driver sink capability) to ensure Hi-Z default at power-up. This behavior is documented in Section 9.1 of the SCLS327H datasheet and validated for industrial backplane use cases.
What is the recommended bypass capacitor configuration for 74AHC16244DGGRG4?
TI specifies individual 0.01 µF to 0.022 µF ceramic capacitors placed adjacent to each of the four VCC pins (pins 7, 18, 31, 42) on the 74AHC16244DGGRG4. For optimal high-frequency noise suppression, these may be paralleled with a shared 0.1 µF capacitor near the device center. All capacitors must be mounted within 2 mm of their respective VCC pin and connected to the nearest GND pin using short, low-inductance traces-per Section 11 of the SCLS327H datasheet. This distributed decoupling strategy mitigates simultaneous switching noise in the TSSOP-48 layout.
Can 74AHC16244DGGRG4 drive a 50 pF load at 50 MHz?
No-while the 74AHC16244DGGRG4 can drive 50 pF loads, its 3.9 ns propagation delay (tPLH/tPHL, VCC = 5 V, CL = 15 pF) implies a practical maximum toggle frequency of ~125 MHz under ideal conditions. At 50 MHz, signal integrity depends on trace impedance matching and slew control. The device's intentionally slowed edge rates minimize ringing on light loads, but for 50 MHz operation with 50 pF, layout must limit trace length to <5 cm and avoid stubs. TI confirms this in Section 10.1, noting that the 74AHC16244DGGRG4 is optimized for reduced ringing-not raw speed.
How many GND pins does 74AHC16244DGGRG4 have, and why are they distributed?
The 74AHC16244DGGRG4 has eight dedicated GND pins (pins 4, 10, 15, 21, 28, 34, 39, 45) distributed across the TSSOP-48 package. This layout provides low-inductance return paths for all 16 outputs and four OE inputs, reducing ground bounce and simultaneous switching noise (SSN) by distributing high-frequency return currents. TI's design-documented in Section 2 ("Features") and Section 12.2 ("Layout Example")-ensures <100 mV SSN under full 16-bit switching, critical for maintaining signal integrity in dense industrial PCBs where the 74AHC16244DGGRG4 is commonly deployed.
74AHC16244DGGRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74AHC16244DGGRG4 FAQ
1.How can I place an order for 74AHC16244DGGRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC16244DGGRG4 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 74AHC16244DGGRG4 reliable?
The price and inventory of 74AHC16244DGGRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC16244DGGRG4 is usually 5 days.
3.What payment methods are accepted for 74AHC16244DGGRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC16244DGGRG4 transactions.
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4.How is shipping managed for 74AHC16244DGGRG4?
74AHC16244DGGRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC16244DGGRG4 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 74AHC16244DGGRG4?
For technical support, including 74AHC16244DGGRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC16244DGGRG4 requirements.
6.How does Aetrix verify that 74AHC16244DGGRG4 is sourced from the original manufacturer or authorized distributors?
All 74AHC16244DGGRG4 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 74AHC16244DGGRG4 meets industry standards.
7.What is the process for return or replacement of 74AHC16244DGGRG4?
All 74AHC16244DGGRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC16244DGGRG4, 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 74AHC16244DGGRG4 part is unused and in its original packaging.
Return procedure for 74AHC16244DGGRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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