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Texas Instruments SN74AHC16244DLRG4
- Part No.:
- SN74AHC16244DLRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC16244DLRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,959
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Product details
Overview
SN74AHC16244DLRG4 from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC designed for memory address, clock, and bus interface applications. It operates from 2 V to 5.5 V, delivers ±8 mA output drive at 5 V, exhibits 3.9 ns typical propagation delay (VCC = 5 V, CL = 15 pF), and supports industrial temperature range (–40°C to 125°C). It is used in motor drives and telecom infrastructure to isolate and strengthen digital signals with controlled edge rates.
For engineers reviewing the SN74AHC16244DLRG4 datasheet, SN74AHC16244DLRG4 pinout, SN74AHC16244DLRG4 application, or SN74AHC16244DLRG4 equivalent, key selection criteria include its 48-pin SSOP package, active-low 3-state enable architecture per 4-bit group, overvoltage-tolerant inputs (up to 5.5 V), low-noise switching behavior, and compatibility with 2.0–5.5 V logic systems.
Technical Context
The SN74AHC16244DLRG4 implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) control (1OE–4OE). Its EPIC™ CMOS process enables rail-to-rail input tolerance and symmetrical drive strength while minimizing high-speed switching noise via distributed VCC/GND pins and flow-through pinout.
Each buffer section operates in true (noninverting) mode only, with output states defined strictly as high, low, or high-impedance - no latching or internal feedback. The device requires external pull-up on OE pins during power sequencing to guarantee defined 3-state behavior at startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 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 (e.g., PCB traces, multiple CMOS inputs) without excessive ringing |
| tPLH / tPHL | 3.9 ns max (VCC = 5 V, CL = 15 pF) - enables reliable operation in 100+ MHz bus environments with timing margin |
| Input Voltage Tolerance | 0 V to 5.5 V regardless of VCC - allows safe interfacing with higher-voltage controllers without level shifters |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial motor control, and base station applications |
| Quiescent Current | 40 µA max (VCC = 5.5 V) - enables low-power standby in always-on subsystems |
| ESD Rating | 2000 V HBM - meets standard handling requirements for automated assembly without special ESD controls |
Pinout & Package
SN74AHC16244DLRG4 uses a 48-pin SSOP (Shrink Small Outline Package) with 0.635 mm pitch and nominal body size 15.80 mm × 7.50 mm. Pin 1 is marked by a beveled corner; pin numbering follows standard counter-clockwise sequence from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output enable (4 independent controls) | Each enables/disables one 4-bit buffer group; tied high via pull-up for default high-Z during power-up |
| 1A1–4A4 | Input (16 total) | CMOS-compatible inputs tolerant to 5.5 V; must be terminated to VCC or GND if unused |
| 1Y1–4Y4 | True noninverting output (16 total) | 3-state outputs with ±8 mA drive; high-Z when corresponding OE is high |
| VCC (Pins 7, 18, 31, 42) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN impedance |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths and enhance signal integrity for all 16 channels |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input and output pins arranged linearly per channel group - simplifies PCB routing and minimizes trace crossovers in dense bus layouts |
| Distributed VCC/GND | Four VCC and eight GND pins interleaved across package - lowers power delivery impedance and suppresses ground bounce |
| Overvoltage-tolerant inputs | Accepts 0–5.5 V regardless of VCC setting - eliminates need for external level translators when interfacing 5 V microcontrollers to 3.3 V or 2.5 V peripherals |
| Controlled edge rates | Slower rise/fall times vs. higher-drive families (e.g., AC) - reduces EMI and output ringing on unterminated lines |
| Latch-up immunity | >250 mA per JESD17 - ensures robustness against transient current faults in noisy industrial environments |
Applications
| Motor Drive Control | Telecom Baseband Interface |
|---|---|
|
Use Scenario: Isolating FPGA GPIO banks from high-current gate driver enable lines in servo amplifier modules. IC Role / Device Role / Timing Role: 3-state buffer providing voltage-level translation and noise isolation between 3.3 V FPGA I/O and 5 V optocoupler inputs. Use Value: Prevents back-driving and ground bounce during concurrent PWM switching; overvoltage tolerance avoids damage from 5 V feedback transients. |
Use Scenario: Driving parallel data buses between DSPs and ADC/DAC arrays in wireless baseband units. IC Role / Device Role / Timing Role: 16-bit bus driver conditioning signals before transmission across 10 cm PCB traces with 15 pF load. Use Value: 3.9 ns propagation delay and controlled edges ensure setup/hold compliance at 50 MHz sampling clocks without termination resistors. |
| Industrial PLC Backplane | Healthcare Sensor Hub |
|
Use Scenario: Buffering address/data lines between microcontroller and EEPROM/FRAM on modular I/O carrier boards. IC Role / Device Role / Timing Role: Memory address driver enabling hot-swap capability via per-group 3-state control (1OE–4OE). Use Value: Independent OE pins allow selective isolation of memory regions during firmware updates, preventing bus contention across shared backplane. |
Use Scenario: Interfacing low-power sensor nodes (accelerometer, ECG front-end) to a central MCU in wearable health monitors. IC Role / Device Role / Timing Role: Signal conditioner translating 5 V sensor alerts to 2.5 V MCU interrupt inputs while suppressing ESD-induced glitches. Use Value: 2000 V HBM rating and 40 µA ICC support battery-operated reliability; slow edges prevent false triggers on sensitive analog sections. |
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 |
|---|---|---|---|
| SN74AHC16244DGVR | TVSOP-48 package (9.70 mm × 4.40 mm); 12.5 °C/W lower RθJA than DL package | Better thermal performance in space-constrained, high-density layouts; same pinout and electrical specs | Select for compact designs requiring improved power dissipation; verify reflow profile compatibility with smaller body size |
| SN74LVCH16244A | Lower VCC range (1.65–3.6 V); higher drive (±24 mA); no 5.5 V input tolerance | Optimized for 3.3 V-only systems; unsuitable for 5 V input interfacing or mixed-voltage domains | Choose only when operating exclusively at ≤3.6 V and needing stronger drive; not a drop-in replacement for SN74AHC16244DLRG4 |
Compared with SN74AHC16244DGVR and SN74LVCH16244A, the SN74AHC16244DLRG4 uniquely balances wide supply range (2–5.5 V), 5.5 V input tolerance, and SSOP mechanical stability - making it preferred for legacy industrial upgrades and multi-rail backplanes where voltage flexibility and board-level ruggedness are critical.
Availability
SN74AHC16244DLRG4 is available at Aetrix Electronics and suitable for motor drives, telecom infrastructure, and industrial PLCs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHC16244DLRG4 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.
The SN74AHC16244DLRG4 belongs to TI's Widebus™ family of high-density bus-interface ICs, engineered specifically to improve signal integrity, layout efficiency, and noise immunity in memory, clock, and data-path applications.
FAQ
What is the maximum operating temperature for SN74AHC16244DLRG4?
The SN74AHC16244DLRG4 is rated for operation from –40°C to 125°C ambient temperature, meeting industrial and extended-temperature requirements. This specification is validated per JEDEC JESD78 and confirmed in the Recommended Operating Conditions table of the official datasheet (SCLS327H, Section 7.3).
Does SN74AHC16244DLRG4 support 5 V input signals when powered at 3.3 V?
Yes, SN74AHC16244DLRG4 inputs are overvoltage tolerant up to 5.5 V regardless of VCC level. When powered at 3.3 V, it safely accepts 5 V logic inputs without damage or level-shifting circuitry - a key feature documented in Section 9.3 and Table 7.3 of the datasheet.
How many independent output-enable controls does SN74AHC16244DLRG4 have?
SN74AHC16244DLRG4 has four independent active-low output-enable inputs: 1OE, 2OE, 3OE, and 4OE. Each controls a separate 4-bit buffer group (e.g., 1OE enables 1Y1–1Y4), enabling granular bus partitioning and hot-swap isolation as described in the Functional Block Diagram (Figure 4) and Pin Functions table.
What is the typical propagation delay of SN74AHC16244DLRG4 at 5 V supply?
At VCC = 5 V ± 0.5 V and CL = 15 pF, the typical propagation delay (tPLH/tPHL) of SN74AHC16244DLRG4 is 5.0 ns, with a maximum of 7.0 ns across temperature. These values are specified in Section 7.7 (Switching Characteristics) of the datasheet and apply to all 16 buffer channels.
Is SN74AHC16244DLRG4 pin-compatible with other packages in the SN74AHC16244 family?
Yes, SN74AHC16244DLRG4 shares identical pinout and functionality with SN74AHC16244DGGR (TSSOP-48) and SN74AHC16244DGVR (TVSOP-48). All variants use the same logic diagram, pin numbering, and signal assignments - only the package dimensions and thermal characteristics differ, as confirmed in the Device Information table (Section 3) and Package Option Addendum.
SN74AHC16244DLRG4 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:
- 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-SSOP
SN74AHC16244DLRG4 FAQ
1.How can I place an order for SN74AHC16244DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC16244DLRG4 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 SN74AHC16244DLRG4 reliable?
The price and inventory of SN74AHC16244DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16244DLRG4 is usually 5 days.
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Once your SN74AHC16244DLRG4 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 SN74AHC16244DLRG4?
For technical support, including SN74AHC16244DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16244DLRG4 requirements.
6.How does Aetrix verify that SN74AHC16244DLRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC16244DLRG4 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 SN74AHC16244DLRG4 meets industry standards.
7.What is the process for return or replacement of SN74AHC16244DLRG4?
All SN74AHC16244DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16244DLRG4, 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 SN74AHC16244DLRG4 part is unused and in its original packaging.
Return procedure for SN74AHC16244DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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