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Texas Instruments SN74AHC16244DGGR
- Part No.:
- SN74AHC16244DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74AHC16244DGGR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,457
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Product details
Overview
SN74AHC16244 from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC designed for memory address, clock, and bus interface applications. It features four independent 4-bit sections with active-low output-enable (OE) inputs, operates from 2 V to 5.5 V, delivers ±8 mA output drive at 5 V, and supports –40°C to 125°C operation in TSSOP-48 package. It is used in telecom infrastructure backplanes to isolate and drive parallel address/data buses.
For engineers reviewing the SN74AHC16244 datasheet, SN74AHC16244 pinout, SN74AHC16244 application, or SN74AHC16244 equivalent, key selection criteria include 3-state output timing (tPLH/tPHL ≤7 ns at 5 V), input overvoltage tolerance up to 5.5 V, distributed VCC/GND pinning for noise reduction, and flow-through pin architecture for optimized PCB routing.
Technical Context
The SN74AHC16244 implements sixteen identical CMOS buffer stages grouped into four independent 4-bit sections, each with dedicated active-low OE control. Its EPIC™ process ensures latch-up immunity >250 mA per JESD 17 and ESD protection >2 kV HBM.
Each section functions as a true (noninverting) buffer with symmetrical drive strength and high-impedance outputs when OE is high. The device uses distributed power/ground pins (eight GND and six VCC terminals) to minimize simultaneous switching noise, and its flow-through pinout places inputs and outputs on opposite sides of the TSSOP-48 package to simplify layer routing.
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 logic to lower-core rails |
| IOL / IOH | ±8 mA at VCC = 5 V - sufficient drive for TTL loads and short PCB traces without external termination |
| tPLH / tPHL | ≤7 ns at VCC = 5 V, CL = 15 pF - enables reliable operation in 100+ MHz bus systems with controlled edge rates |
| VIH / VIL | 3.85 V / 1.65 V at VCC = 5.5 V - compatible with standard 5 V CMOS/TTL input thresholds |
| Input Voltage Range | 0 V to 5.5 V - allows 5 V-tolerant inputs even when VCC = 2.5 V or 3.3 V, enabling level-shifting |
| Operating Temperature | –40°C to 125°C - qualified for industrial and extended-temperature embedded control and infrastructure equipment |
| ICC (Max) | 40 µA at VCC = 5.5 V - ultra-low static power for always-on buffer stages in power-sensitive designs |
Pinout & Package
TSSOP-48 package (body size 12.50 mm × 6.10 mm), 0.5 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable | Controls 4-bit group (1Y1–1Y4, etc.); tied high via pull-up for power-up high-Z safety |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer inputs | 16 total CMOS inputs; 5.5 V tolerant regardless of VCC |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Noninverting 3-state outputs | 16 true outputs; high-Z when corresponding OE = high; ±8 mA sink/source at 5 V |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four distributed VCC pins reduce IR drop and switching noise across wide bus drivers |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all 16 outputs and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Inputs on one side, outputs on opposite side - eliminates layer crossovers and reduces trace length in dense bus layouts |
| Distributed VCC and GND pins | Four VCC + eight GND terminals - lowers simultaneous switching noise by >30% vs. single-supply packages |
| 5.5 V-tolerant inputs | Accepts 0–5.5 V input signals at any valid VCC (2–5.5 V) - enables seamless voltage translation without external level shifters |
| Slow edge rate control | Internal slew limiting minimizes overshoot/undershoot on unterminated lines - reduces need for external RC damping |
| Latch-up immunity | >250 mA per JESD 17 - prevents destructive latch-up during hot-swap or transient fault conditions |
Applications
| Telecom Backplane Interface | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Driving parallel address/data buses between FPGA and legacy memory modules in 5G baseband units. IC Role / Device Role / Timing Role: 16-bit noninverting buffer isolating FPGA I/O from noisy backplane traces while maintaining signal integrity at 80 MHz. Use Value: Distributed VCC/GND pins suppress ground bounce; 5.5 V-tolerant inputs allow direct connection to 5 V legacy peripherals without level shifters. | Use Scenario: Expanding digital input/output capacity of ARM-based PLC controllers using parallel GPIO expansion. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling time-multiplexed access to shared sensor/actuator bus under microcontroller control. Use Value: Four independent OE controls permit selective activation of 4-bit groups, reducing dynamic power by 75% vs. full-bus activation. |
| Healthcare Imaging Data Acquisition | Automotive ADAS Sensor Hub |
Use Scenario: Buffering parallel ADC output streams from multi-channel ultrasound front-ends before FPGA capture. IC Role / Device Role / Timing Role: Low-noise 16-bit driver delivering clean, edge-controlled signals to FPGA fabric with minimal jitter accumulation. Use Value: Slow edge rates suppress EMI in sensitive analog-rich environments; –40°C to 125°C rating supports fanless enclosure operation. | Use Scenario: Aggregating CAN, LIN, and digital sensor signals onto a central domain controller bus in vehicle cockpit modules. IC Role / Device Role / Timing Role: Voltage-translating buffer interfacing 3.3 V MCU GPIO with 5 V sensor supply domains and legacy automotive peripherals. Use Value: Input overvoltage tolerance eliminates discrete level-shifters; latch-up immunity ensures robustness against load-dump transients. |
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 |
|---|---|---|---|
| SN74LVCH16244A | Lower VCC range (1.65–3.6 V), higher drive (±24 mA), no 5.5 V input tolerance | Better suited for 3.3 V-only systems requiring stronger drive; incompatible with 5 V input sources | Select when operating exclusively at 1.8 V or 3.3 V and needing higher current capability |
| 74ALVC16244 | Wider VCC (1.65–3.6 V), faster propagation (≤3.5 ns), 3.6 V max input voltage | Optimized for high-speed 3.3 V LVTTL interfaces; lacks 5 V tolerance and extended temperature support | Select for sub-10 ns timing-critical 3.3 V bus applications where 5 V compatibility is unnecessary |
Compared with SN74LVCH16244A and 74ALVC16244, the SN74AHC16244 uniquely supports 2–5.5 V operation with 5.5 V-tolerant inputs and industrial temperature range, making it the only choice for mixed-voltage, extended-temp, or legacy 5 V interface scenarios.
Availability
SN74AHC16244 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging systems requiring stable component supply across long production lifecycles.
Supply support for SN74AHC16244 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 for industrial, automotive, and communications markets.
The SN74AHC16244 belongs to TI's Widebus™ family of high-density bus interface ICs, engineered for noise-immune, space-efficient buffering in memory, clock, and data-path applications.
FAQ
What is the maximum output current per pin for SN74AHC16244?
The SN74AHC16244 supports ±8 mA DC output current per pin at VCC = 5 V, with absolute maximum continuous output current limited to ±25 mA per output and ±75 mA total for the entire device. This rating ensures reliable drive into standard TTL loads and short PCB traces without thermal derating in the –40°C to 125°C operating range. Exceeding these limits risks parametric shift or long-term reliability degradation.
Does SN74AHC16244 support 5 V input signals when powered at 3.3 V?
Yes, SN74AHC16244 supports input voltages up to 5.5 V regardless of VCC level - including when VCC = 3.3 V or 2.5 V. This 5.5 V-tolerant input capability is explicitly specified in the Recommended Operating Conditions table and enables direct interfacing with 5 V logic without external level shifters, simplifying mixed-voltage system design.
What is the recommended power supply decoupling for SN74AHC16244?
TI recommends placing a 0.1 μF ceramic capacitor near each VCC pin (pins 7, 18, 31, 42) of the SN74AHC16244, with shortest possible trace lengths to adjacent GND pins. For high-frequency noise suppression, paralleling a 1.0 μF capacitor is acceptable. This decoupling strategy mitigates simultaneous switching noise caused by 16 outputs switching in concert, preserving signal integrity on shared power rails.
How does the flow-through pinout of SN74AHC16244 improve PCB layout?
The flow-through pinout of SN74AHC16244 places all 16 inputs on one side (left) and all 16 outputs on the opposite side (right) of the TSSOP-48 package. This arrangement enables straight-through routing without layer jumps or vias between driver and load, reducing trace inductance, crosstalk, and layout complexity - especially critical in high-density backplane and memory interface designs.
Is SN74AHC16244 suitable for automotive applications?
The SN74AHC16244 is rated for –40°C to 125°C operation and meets JESD 17 latch-up immunity (>250 mA) and HBM ESD performance (>2 kV), satisfying core robustness requirements for under-hood and cockpit electronics. However, it is not AEC-Q100 qualified; for automotive production use, designers must perform full system-level qualification and consider TI's automotive-grade alternatives like SN74AHC16244-Q1 if required.
SN74AHC16244DGGR 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:
- 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-TSSOP
SN74AHC16244DGGR FAQ
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5.How can I obtain technical support or documentation for SN74AHC16244DGGR?
For technical support, including SN74AHC16244DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16244DGGR requirements.
6.How does Aetrix verify that SN74AHC16244DGGR is sourced from the original manufacturer or authorized distributors?
All SN74AHC16244DGGR 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 SN74AHC16244DGGR meets industry standards.
7.What is the process for return or replacement of SN74AHC16244DGGR?
All SN74AHC16244DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16244DGGR, 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 SN74AHC16244DGGR part is unused and in its original packaging.
Return procedure for SN74AHC16244DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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