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Texas Instruments 74FCT16244TPACTG4
- Part No.:
- 74FCT16244TPACTG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74FCT16244TPACTG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,657
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Product details
Overview
74FCT16244TPACTG4 from Texas Instruments is a 16-bit non-inverting three-state buffer/line driver designed for high-speed memory and bus interface applications. It delivers 64 mA sink and 32 mA source drive capability, supports Ioff partial-power-down protection, operates at 5V ±10%, and features typical output skew <250 ps. It is optimized for driving high-capacitance loads and low-impedance backplanes.
For engineers reviewing the 74FCT16244TPACTG4 datasheet, 74FCT16244TPACTG4 pinout, 74FCT16244TPACTG4 application, or 74FCT16244TPACTG4 equivalent, key selection criteria include its 6.5 ns max propagation delay, TSSOP-48 package with 0.5 mm pitch, industrial temperature range (–40°C to +85°C), and compatibility with TTL-level inputs and CMOS-level outputs in 5V systems.
Technical Context
This device implements four independent 4-bit groups of non-inverting buffers, each with dedicated active-low three-state enable (OE) control, enabling flexible 4-bit, 8-bit, or full 16-bit bus operation. Its flow-through pinout minimizes PCB trace length and crosstalk in dense routing environments.
The 74FCT16244TPACTG4 integrates edge-rate control circuitry to suppress switching noise and ground bounce, achieving typical VOLP <1.0 V at VCC = 5 V and TA = 25°C. It is fully specified for partial-power-down operation via Ioff, which disables outputs and prevents damaging current backflow when VCC = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS 5V logic rails and legacy system power domains |
| Propagation Delay (tPLH/tPHL) | Max 6.5 ns - enables reliable operation in high-speed address/data bus timing paths up to ~150 MHz |
| Output Drive | 64 mA sink / 32 mA source - sufficient to drive 50 Ω transmission lines or heavy capacitive loads (>100 pF) |
| Output Skew (tSK(O)) | ≤0.5 ns - ensures tight timing alignment across all 16 outputs for synchronous bus integrity |
| Ioff Protection | Active at VCC = 0 V - prevents back-current damage during hot-insertion or partial system power-down |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and infrastructure equipment |
| ESD Rating | >2000 V HBM - provides robust handling margin in manufacturing and field service environments |
Pinout & Package
74FCT16244TPACTG4 is housed in a 48-pin Thin Shrink Small-Outline Package (TSSOP), designated DGG by Texas Instruments, with 0.5 mm pitch, 12.5 mm × 6.1 mm body size, and maximum height of 1.2 mm. This RoHS-compliant package supports fine-pitch surface-mount assembly and thermal performance suitable for industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 (Pins 1–4, 7–10, 13–16, 19–22) | Data Inputs | Four independent 4-bit input groups accepting TTL-compatible logic levels (VIH ≥2.0 V, VIL ≤0.8 V) |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 (Pins 5–6, 11–12, 17–18, 23–24) | Three-State Outputs | Non-inverting buffered outputs with high-impedance state controlled by corresponding OE pins |
| 1OE, 2OE, 3OE, 4OE (Pins 25, 27, 29, 31) | Active-Low Output Enables | Independent per-group enables allow selective 4-bit, 8-bit, or 16-bit bus gating without external logic |
| VCC (Pins 26, 34, 40, 46) | Power Supply | Four distributed VCC pins reduce supply inductance and improve noise immunity across wide bus widths |
| GND (Pins 28, 30, 32, 33, 36–39, 41–45, 47–48) | Ground Return | Twelve GND pins provide low-inductance return paths, critical for minimizing ground bounce in high-drive applications |
Key Features
| Feature | Design Value |
|---|---|
| Ioff partial-power-down support | Prevents back-current flow when VCC = 0 V, enabling safe hot-swap and mixed-voltage domain interfacing |
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) and ground bounce, improving signal integrity on shared buses |
| Flow-through pinout architecture | Minimizes trace crossing and layer transitions, simplifying layout for 16-bit parallel interfaces |
| Industrial temperature qualification | Validated operation from –40°C to +85°C ensures reliability in uncontrolled environmental deployments |
| High noise immunity | Input hysteresis ≥100 mV and ESD >2000 V HBM protect against transient coupling in electrically noisy systems |
Applications
| Memory Address Buffering | Backplane Data Driver |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting buffer providing level translation, fanout expansion, and timing isolation between controller and memory array. Use Value: 6.5 ns propagation delay and <0.5 ns output skew ensure setup/hold timing margins are preserved across all address bits under worst-case loading. |
Use Scenario: Transmitting parallel data across a 16-bit passive backplane with >50 pF per line capacitance. IC Role / Device Role / Timing Role: High-current line driver delivering clean, low-skew signals to remote slots while suppressing ground bounce-induced jitter. Use Value: 64 mA sink capability maintains VOL ≤0.55 V even at full load, preventing logic threshold violations at receiver inputs. |
| Legacy Bus Interface | Industrial Control I/O Expansion |
Use Scenario: Interfacing a modern FPGA I/O bank (3.3 V tolerant) to a legacy 5 V TTL bus segment. IC Role / Device Role / Timing Role: Level-shifting buffer with TTL-compatible inputs and CMOS-compatible outputs, supporting bidirectional timing-critical control signals. Use Value: VIH = 2.0 V minimum and VOH ≥2.5 V at –32 mA ensure robust logic recognition and drive strength across voltage domain boundaries. |
Use Scenario: Expanding digital I/O capacity in programmable logic controllers (PLCs) where long cable runs induce noise and capacitance. IC Role / Device Role / Timing Role: Noise-immune bus driver with Ioff protection, enabling safe reconfiguration of I/O modules without powering down the main controller. Use Value: Ioff functionality and >2000 V HBM ESD rating prevent latch-up or damage during field maintenance and module hot-swap operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT162244TPACT | 24 mA balanced output drive (vs. 64/32 mA asymmetrical); includes current-limiting resistors for reduced ground bounce | Better suited for transmission-line driving with minimal undershoot; lower drive limits suitability for heavy capacitive loads | Select when driving controlled-impedance traces (e.g., 50 Ω) rather than high-C backplanes or memory arrays |
| CY74FCT162H244TPACT | Includes bus-hold circuitry on all inputs; eliminates need for external pull-up/down resistors | Preferred for floating-input scenarios (e.g., unconnected bus segments or hot-plug connectors) where input stability is critical | Choose when system design lacks external termination and requires automatic input state retention during high-impedance states |
Compared with CY74FCT162244TPACT and CY74FCT162H244TPACT, the 74FCT16244TPACTG4 offers higher sink current for demanding loads but lacks bus-hold and output current limiting-making it optimal for deterministic, high-drive bus buffering where external termination and stable inputs are assured.
Availability
74FCT16244TPACTG4 is available at Aetrix Electronics and suitable for memory subsystems, industrial backplane interfaces, legacy bus bridging, and programmable controller I/O expansion requiring stable component supply across extended product lifecycles.
Supply support for 74FCT16244TPACTG4 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 industrial, automotive, and communications markets.
The 74FCT16244TPACTG4 belongs to TI's FCT logic family, engineered for high-speed, low-noise 5V bus interface applications where timing precision, drive strength, and power-down safety are critical.
FAQ
What is the maximum operating frequency supported by the 74FCT16244TPACTG4?
The 74FCT16244TPACTG4 does not specify a maximum clock frequency directly, but its 6.5 ns maximum propagation delay supports reliable operation in bus systems with signal periods ≥13 ns-equivalent to a theoretical upper limit of ~77 MHz for single-edge timing-critical paths. Real-world usable frequency depends on load capacitance, trace impedance, and system timing margins; for 50 pF loads, practical operation exceeds 50 MHz.
Does the 74FCT16244TPACTG4 support 3.3 V input logic levels?
Yes, the 74FCT16244TPACTG4 accepts 3.3 V logic-high inputs reliably: its VIH specification is 2.0 V minimum at VCC = 5 V, and typical VIH is ~2.4 V. A 3.3 V signal exceeds this threshold with >1.3 V noise margin, making it compatible with 3.3 V microcontrollers and FPGAs driving into the 5 V buffer inputs without level shifters.
Is the 74FCT16244TPACTG4 pin-compatible with other members of the CY74FCT162xx4T family?
Yes, the 74FCT16244TPACTG4 shares identical pinout, package (TSSOP-48), and footprint with CY74FCT162244TPACT and CY74FCT162H244TPACT. All three variants use the same flow-through arrangement and terminal assignments, enabling direct PCB substitution when drive strength, bus-hold, or noise requirements align with the target application.
What is the purpose of the multiple VCC and GND pins on the 74FCT16244TPACTG4?
The 74FCT16244TPACTG4 includes four VCC and twelve GND pins to minimize power distribution inductance and reduce ground bounce during simultaneous switching of all 16 outputs. This multi-pin power strategy stabilizes local supply voltage, maintains consistent output thresholds, and improves noise immunity-especially critical when sinking 64 mA per output in high-density bus applications.
Can the 74FCT16244TPACTG4 be used in hot-swap applications?
Yes, the 74FCT16244TPACTG4 supports hot-swap operation via its Ioff feature: when VCC = 0 V, the Ioff circuitry disables all outputs, blocking current backflow from live bus lines into the unpowered device. This prevents damage to both the buffer and upstream drivers, making it suitable for modular systems requiring field-replaceable I/O cards or backplane add-in boards.
74FCT16244TPACTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74FCT16244TPACTG4 FAQ
1.How can I place an order for 74FCT16244TPACTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT16244TPACTG4 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 74FCT16244TPACTG4 reliable?
The price and inventory of 74FCT16244TPACTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT16244TPACTG4 is usually 5 days.
3.What payment methods are accepted for 74FCT16244TPACTG4?
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4.How is shipping managed for 74FCT16244TPACTG4?
74FCT16244TPACTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT16244TPACTG4 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 74FCT16244TPACTG4?
For technical support, including 74FCT16244TPACTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT16244TPACTG4 requirements.
6.How does Aetrix verify that 74FCT16244TPACTG4 is sourced from the original manufacturer or authorized distributors?
All 74FCT16244TPACTG4 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 74FCT16244TPACTG4 meets industry standards.
7.What is the process for return or replacement of 74FCT16244TPACTG4?
All 74FCT16244TPACTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT16244TPACTG4, 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 74FCT16244TPACTG4 part is unused and in its original packaging.
Return procedure for 74FCT16244TPACTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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