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Texas Instruments SN74AHC16244DLR
- Part No.:
- SN74AHC16244DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC16244DLR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
SN74AHC16244DLR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC in SSOP-48 package, operating from 2 V to 5.5 V supply, with ±8 mA output drive at 5 V, 7 ns typical propagation delay (VCC = 5 V, CL = 15 pF), and –40°C to 125°C temperature range. It serves as a high-density bus interface for memory address drivers and clock distribution in industrial control systems.
For engineers reviewing the SN74AHC16244DLR datasheet, SN74AHC16244DLR pinout, SN74AHC16244DLR application, or SN74AHC16244DLR equivalent, key selection criteria include its 3-state output enable architecture, input overvoltage tolerance up to 5.5 V, distributed VCC/GND pin layout for noise reduction, and flow-through pin arrangement optimizing PCB routing in space-constrained embedded designs.
Technical Context
The SN74AHC16244DLR implements four independent 4-bit noninverting buffers, each with active-low 3-state output enable (1OE–4OE). Its EPIC™ CMOS process enables rail-to-rail input voltage tolerance and symmetrical output drive strength.
Each buffer section operates with true (noninverting) logic polarity and supports down-translation: inputs accept 5.5 V regardless of VCC (2–5.5 V), while outputs swing between GND and VCC. Distributed power/ground pins minimize simultaneous switching noise during high-speed bus toggling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - Enables interoperability across mixed-voltage systems (e.g., 3.3 V logic driving 5 V peripherals) |
| Output Drive Strength | ±8 mA at VCC = 5 V - Sufficient for moderate-capacitance buses without external buffering |
| Propagation Delay | 3.9 ns min / 7 ns max (VCC = 5 V, CL = 15 pF) - Supports >100 MHz bus operation with timing margin |
| Input Voltage Tolerance | 0 V to 5.5 V independent of VCC - Allows safe interfacing with higher-voltage controllers or legacy systems |
| Operating Temperature | –40°C to 125°C - Qualified for under-hood automotive, industrial motor drives, and telecom infrastructure |
| Quiescent Current | 4 µA max (VCC = 5.5 V) - Enables low-power standby modes in battery-backed systems |
| ESD Protection | 2000 V HBM - Meets MIL-STD-883 requirements for robust handling in manufacturing environments |
Pinout & Package
SN74AHC16244DLR uses a 48-pin SSOP (Shrink Small Outline Package) with 15.80 mm × 7.50 mm body size, 0.635 mm lead pitch, and gull-wing leads. The package features distributed VCC and GND pins to suppress ground bounce and improve signal integrity in high-speed switching applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output enable (4 independent controls) | Enables/disables corresponding 4-bit buffer group; tied to VCC via pull-up for power-up high-Z safety |
| 1A1–4A4 | Buffer input (16 total) | True (noninverting) data inputs; tolerate up to 5.5 V regardless of VCC level |
| 1Y1–4Y4 | Buffer output (16 total) | 3-state outputs driven by respective A-inputs when OE is low; high-Z when OE is high |
| VCC (Pins 7, 18, 31, 42) | Power supply | Distributed VCC pins reduce IR drop and improve decoupling effectiveness across die |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight dedicated GND pins minimize ground loop inductance and suppress simultaneous switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Input and output pins arranged on opposite sides of package - enables straight PCB trace routing, reducing crosstalk and stub length |
| Distributed VCC/GND pinning | Four VCC and eight GND pins interleaved across package - lowers power delivery impedance and improves noise immunity at >50 MHz switching |
| Input overvoltage tolerance | Inputs rated to 5.5 V regardless of VCC (2–5.5 V) - eliminates need for level shifters when interfacing with 5 V microcontrollers or FPGAs |
| Latch-up immunity | Exceeds 250 mA per JESD 17 - ensures robustness against transient current faults in industrial I/O modules |
| Slow edge rate control | Intentionally limited dV/dt reduces output ringing and EMI - critical for clean signal integrity on long traces or unterminated buses |
Applications
| Motor Drive Control Interface | Industrial PLC Backplane Buffer |
|---|---|
Use Scenario: Isolating and driving address/data lines between FPGA-based motion controller and multi-axis servo driver modules. IC Role / Device Role / Timing Role: 16-bit noninverting buffer providing 3-state isolation between controller and peripheral buses during reconfiguration cycles. Use Value: Flow-through pinout minimizes trace skew; distributed GND pins suppress noise from high-current motor switching transients. |
Use Scenario: Level-shifting and bus loading management between 3.3 V CPU module and legacy 5 V I/O expansion cards in modular PLC chassis. IC Role / Device Role / Timing Role: Down-translating buffer enabling 5 V-tolerant inputs to operate from 3.3 V VCC while driving 5 V bus loads. Use Value: Input overvoltage tolerance eliminates external level shifters; ±8 mA drive sustains signal integrity across 15 cm backplane traces. |
| Telecom Baseband Signal Routing | Healthcare Imaging Data Acquisition |
Use Scenario: Multiplexing parallel ADC/DAC data paths in wireless infrastructure baseband processing units with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise 3-state buffer isolating ADC output banks from shared data bus during conversion windows. Use Value: Slow edge rates and distributed power pins reduce radiated emissions below CISPR 22 Class B limits without added ferrites. |
Use Scenario: Interfacing high-resolution medical sensor arrays (e.g., ultrasound transducer elements) to FPGA-based digitization pipelines. IC Role / Device Role / Timing Role: 16-bit buffer conditioning analog front-end digital control signals before transmission over noise-sensitive imaging backplanes. Use Value: –40°C to 125°C rating supports fanless enclosures; latch-up immunity prevents field failures in MRI-adjacent equipment. |
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 at 3.3 V; faster tPLH (2.5 ns typ) | Not suitable for 5 V systems or mixed-voltage translation; requires strict 3.3 V-only supply | Select when operating exclusively at 3.3 V with higher drive needs and tighter timing budgets |
| 74ALVC16244PW | Wider VCC (1.65–3.6 V); 24 mA drive; smaller TSSOP-48 (12.5 × 6.1 mm) footprint | Lacks 5.5 V input tolerance; no 125°C rating; unsuitable for automotive under-hood use | Prefer for space-constrained consumer electronics where 5 V compatibility and extended temperature are not required |
Compared with SN74LVC16244ADGGR and 74ALVC16244PW, SN74AHC16244DLR uniquely supports 2–5.5 V operation with 5.5 V-tolerant inputs and full industrial temperature range - making it the only option among the three qualified for mixed-voltage industrial and automotive control applications requiring robustness and flexibility.
Availability
SN74AHC16244DLR is available at Aetrix Electronics and suitable for motor drive interfaces, industrial PLC backplanes, telecom baseband routing, and healthcare imaging data acquisition requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for SN74AHC16244DLR 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 connectivity technologies, with decades of expertise in high-reliability logic and interface solutions.
SN74AHC16244DLR belongs to TI's AHC logic family - engineered for wide-supply operation, noise-immune bus interfacing, and industrial-grade reliability in demanding embedded control and infrastructure applications.
FAQ
What is the maximum operating temperature for SN74AHC16244DLR?
The SN74AHC16244DLR is specified for continuous operation from –40°C to 125°C ambient temperature, meeting industrial and extended-temperature automotive requirements. This rating is validated per JEDEC JESD78 and confirmed in the Recommended Operating Conditions table of the official datasheet (SCLS327H, Rev. October 2014).
Does SN74AHC16244DLR support 5 V input signals when powered from 3.3 V?
Yes, SN74AHC16244DLR supports input voltages up to 5.5 V regardless of VCC level - including when VCC = 3.3 V. This overvoltage tolerance is explicitly guaranteed in the Electrical Characteristics table (VI specification) and enables safe interfacing with 5 V microcontrollers or legacy peripherals without external level shifters.
How many independent 3-state enable controls does SN74AHC16244DLR provide?
SN74AHC16244DLR provides four independent active-low output enable inputs: 1OE, 2OE, 3OE, and 4OE. Each controls a separate 4-bit buffer section (1A1–1Y4, 2A1–2Y4, etc.), allowing granular bus partitioning and selective isolation of subsystems on a shared data path.
What is the recommended power supply bypassing for SN74AHC16244DLR?
TI recommends placing a 0.1 µF ceramic capacitor near each VCC pin (Pins 7, 18, 31, 42) of SN74AHC16244DLR, with shortest possible trace lengths to adjacent GND pins. For enhanced high-frequency noise suppression, paralleling with a 1.0 µF capacitor is acceptable - as detailed in Section 11 (Power Supply Recommendations) of the datasheet.
Is SN74AHC16244DLR pin-compatible with other packages in the same family?
No - SN74AHC16244DLR (SSOP-48) has a different mechanical footprint and lead pitch than the TSSOP-48 (DGG) and TVSOP-48 (DGV) variants. While electrical functionality and pin functions are identical across packages, PCB layout must be redesigned for DL package dimensions (15.80 mm × 7.50 mm, 0.635 mm pitch) versus DGG (12.50 mm × 6.10 mm) or DGV (9.70 mm × 4.40 mm).
SN74AHC16244DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 48-BSSOP (0.295", 7.50mm 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74AHC16244DLR FAQ
1.How can I place an order for SN74AHC16244DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC16244DLR 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 SN74AHC16244DLR reliable?
The price and inventory of SN74AHC16244DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16244DLR is usually 5 days.
3.What payment methods are accepted for SN74AHC16244DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC16244DLR transactions.
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4.How is shipping managed for SN74AHC16244DLR?
SN74AHC16244DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC16244DLR 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 SN74AHC16244DLR?
For technical support, including SN74AHC16244DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16244DLR requirements.
6.How does Aetrix verify that SN74AHC16244DLR is sourced from the original manufacturer or authorized distributors?
All SN74AHC16244DLR 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 SN74AHC16244DLR meets industry standards.
7.What is the process for return or replacement of SN74AHC16244DLR?
All SN74AHC16244DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16244DLR, 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 SN74AHC16244DLR part is unused and in its original packaging.
Return procedure for SN74AHC16244DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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