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Texas Instruments 74ACT16245DLRG4
- Part No.:
- 74ACT16245DLRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16245DLRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,057
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Product details
Overview
74ACT16245DLRG4 from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses in industrial and embedded systems. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C temperature range, delivers ±24 mA output drive, and features flow-through pinout for optimized PCB layout in memory and peripheral interface applications.
For engineers reviewing the 74ACT16245DLRG4 datasheet, 74ACT16245DLRG4 pinout, 74ACT16245DLRG4 application, or 74ACT16245DLRG4 equivalent, key selection criteria include bidirectional data control via DIR/G inputs, TTL-voltage-compatible inputs, distributed VCC/GND for noise reduction, and SSOP-48 package compatibility with high-density board designs.
Technical Context
The 74ACT16245DLRG4 implements dual-octal transceiver logic with independent direction (DIR) and output-enable (G) controls per 8-bit port, enabling flexible A↔B or B↔A data routing without external timing circuitry. Its EPIC™ CMOS process ensures 500-mA latch-up immunity at 125°C and supports TTL-level input thresholds (VIL = 0.8 V, VVIH = 2.0 V).
Switching performance is characterized by tPLH/tPHL ≤ 10.5 ns (max) at VCC = 5.5 V, with tPZH/tPZL ≤ 11.6 ns for output enable/disable transitions. Power dissipation capacitance is 52 pF (enabled) and 10 pF (disabled), supporting low dynamic power in burst-mode bus operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS logic rails and tolerant of supply ripple. |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments. |
| Output Drive | ±24 mA - sufficient to directly drive terminated bus lines without external buffers. |
| Propagation Delay | ≤10.5 ns - enables reliable operation in 50-MHz+ synchronous bus systems. |
| Input Compatibility | TTL-voltage - accepts standard 0.8 V / 2.0 V logic thresholds, eliminating level-shifter requirements. |
| Power Dissipation Cap. | 52 pF (enabled), 10 pF (disabled) - reduces dynamic current draw during idle or low-activity states. |
| Latch-Up Immunity | 500 mA typical at 125°C - meets stringent reliability requirements for harsh thermal environments. |
Pinout & Package
74ACT16245DLRG4 uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm pitch, 12.6 mm × 6.2 mm body, and 1.2 mm max height - optimized for automated assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Active-High signal selecting data flow direction (L = B→A, H = A→B) per octal section. |
| 1G, 2G | Output enable input | Active-Low control disabling all outputs to high-impedance state for bus isolation. |
| 1A1–1A8, 2A1–2A8 | Port A I/O terminals | First and second 8-bit data bus interface on A side; TTL-compatible inputs, 3-state CMOS outputs. |
| 1B1–1B8, 2B1–2B8 | Port B I/O terminals | First and second 8-bit data bus interface on B side; identical electrical characteristics to Port A. |
| VCC (Pins 7, 18, 29, 40) | Power supply | Distributed VCC pins minimize simultaneous switching noise and improve power integrity. |
| GND (Pins 4, 11, 22, 33, 44) | Ground reference | Multiple GND pins provide low-inductance return paths and reduce ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposite sides (e.g., A ports on left, B ports on right) to eliminate layer jumps and reduce trace length in PCB layout. |
| Distributed VCC/GND | Four VCC and five GND pins placed across the package perimeter to suppress high-speed switching noise and stabilize supply rail impedance. |
| EPIC™ CMOS process | 1-μm implanted CMOS technology delivering high noise immunity, low static power (<160 μA ICC), and robust latch-up resistance. |
| 3-State output control | Independent G inputs per octal group allow selective bus isolation without affecting adjacent channels or requiring global reset sequencing. |
| TTL-input compatibility | Guaranteed VIH = 2.0 V and VIL = 0.8 V ensure interoperability with legacy 5-V TTL logic families without pull-up resistors or translators. |
Applications
| Memory Interface | Peripheral Expansion |
|---|---|
Use Scenario: Bidirectional data transfer between microcontroller address/data bus and SRAM or Flash memory arrays. IC Role / Device Role / Timing Role: Bus transceiver providing controlled A↔B data path with DIR-driven direction and G-gated isolation during memory refresh cycles. Use Value: Enables single-chip bus arbitration without external glue logic; flow-through pinout simplifies trace routing between CPU and memory ICs. | Use Scenario: Interfacing an MCU's parallel I/O port to external peripherals such as LCD controllers, ADCs, or FPGA configuration interfaces. IC Role / Device Role / Timing Role: Level-translating and bus-isolating transceiver allowing hot-plug-safe peripheral attachment and software-controlled bus directionality. Use Value: Eliminates need for discrete MOSFET switches or dual-directional level shifters; ±24 mA drive supports capacitive loads up to 50 pF. |
| Backplane Interconnect | Industrial Control Bus |
Use Scenario: Signal conditioning and isolation between processor module and backplane-mounted I/O cards in modular PLC chassis. IC Role / Device Role / Timing Role: High-noise-immunity transceiver buffering data across long traces, with distributed VCC/GND suppressing crosstalk-induced glitches. Use Value: Meets industrial EMI requirements without added ferrites or shielding; 500-mA latch-up rating ensures resilience against transient overcurrent events. | Use Scenario: Isolating sensor acquisition bus from real-time control bus in motor drive or power converter subsystems. IC Role / Device Role / Timing Role: Synchronized bidirectional data conduit managed by microcontroller GPIOs driving DIR/G, enabling deterministic read/write timing. Use Value: Supports deterministic latency-critical sampling (e.g., current sensing feedback loops) with sub-11 ns propagation delay and no internal clock dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT16244DLR | Octal noninverting buffer (unidirectional only); lacks DIR input and B→A capability. | Suitable only for fixed-direction bus extension, not bidirectional communication. | Select when system requires one-way data flow and lower pin count is prioritized over flexibility. |
| SN74LVC16245ADGGR | 3.3-V logic family; supports 1.65–3.6 V VCC; higher speed (tpd ≤ 5.5 ns) but lower drive (±24 mA @ 3.3 V). | Required for mixed-voltage systems interfacing 3.3-V FPGAs or processors with 5-V peripherals. | Choose for modern low-voltage designs where 5-V tolerance is unnecessary and faster timing margins are critical. |
Compared with 74ACT16245DLRG4, the 74ACT16244DLR sacrifices bidirectionality for reduced complexity and cost in unidirectional paths, while the SN74LVC16245ADGGR shifts voltage domain and speed profile to suit 3.3-V ecosystems-neither offers pin-to-pin compatibility or identical 5-V TTL interface behavior.
Availability
74ACT16245DLRG4 is available at Aetrix Electronics and suitable for memory interface, peripheral expansion, backplane interconnect, and industrial control bus applications requiring stable component supply and long-term industrial-grade availability.
Supply support for 74ACT16245DLRG4 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 experience in high-reliability logic and interface solutions.
The 74ACT16245DLRG4 belongs to TI's Widebus™ family of high-speed CMOS bus interface devices, engineered specifically for noise-resilient, high-density data path management in industrial and computing infrastructure.
FAQ
What is the maximum operating voltage for the 74ACT16245DLRG4?
The 74ACT16245DLRG4 has an absolute maximum supply voltage of 7 V, but its recommended operating range is strictly 4.5 V to 5.5 V. Operation outside this window may cause timing violations, increased power consumption, or reliability degradation. The 74ACT16245DLRG4 is not rated for 3.3-V operation and requires a stable 5-V rail with proper decoupling at all four VCC pins.
Does the 74ACT16245DLRG4 support hot-swap or live insertion?
The 74ACT16245DLRG4 is not explicitly qualified for hot-swap operation. While its 3-state outputs and high latch-up immunity (500 mA at 125°C) provide some margin, the device lacks built-in bus-hold, power-on reset, or IOFF protection. For live-insertion scenarios, external current-limiting resistors and sequencing controls are recommended to prevent bus contention during insertion. Always verify system-level stress conditions before deploying the 74ACT16245DLRG4 in hot-swap applications.
How many 74ACT16245DLRG4 devices can be connected to a single 50-pF bus line?
Each 74ACT16245DLRG4 contributes up to 16 pF of Cio per active I/O pin. With all 16 outputs enabled, total capacitive load is ~256 pF - exceeding typical 50-pF bus limits. In practice, only one 74ACT16245DLRG4 should drive a 50-pF line directly. For multi-device busing, use series termination or reduce fan-out by enabling only required transceivers via their individual G inputs, ensuring cumulative Cio stays within target timing budgets.
Is the 74ACT16245DLRG4 RoHS compliant?
Yes, the 74ACT16245DLRG4 is RoHS compliant, as confirmed by Texas Instruments' Package Option Addendum (July 2026). It uses NiPdAu (NIPDAU) lead finish and carries a JEDEC Level-1 moisture sensitivity rating with unlimited peak reflow tolerance at 260°C. Full compliance documentation, including substance declarations and test reports, is available through TI's official product page and Aetrix Electronics' material certifications portal.
Can unused control inputs on the 74ACT16245DLRG4 be left floating?
No, unused control inputs (1DIR, 2DIR, 1G, 2G) must not be left floating. Per TI's recommended operating conditions, all unused inputs should be tied to VCC through a pullup resistor of ≥5 kΩ to prevent metastability, excessive supply current, or unintended output activation. Floating DIR or G pins may cause erratic bus behavior, increased ICC, or oscillation due to noise coupling - a design violation that compromises functional safety and EMC performance of the 74ACT16245DLRG4.
74ACT16245DLRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74ACT16245DLRG4 FAQ
1.How can I place an order for 74ACT16245DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16245DLRG4 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 74ACT16245DLRG4 reliable?
The price and inventory of 74ACT16245DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16245DLRG4 is usually 5 days.
3.What payment methods are accepted for 74ACT16245DLRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16245DLRG4 transactions.
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4.How is shipping managed for 74ACT16245DLRG4?
74ACT16245DLRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16245DLRG4 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 74ACT16245DLRG4?
For technical support, including 74ACT16245DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16245DLRG4 requirements.
6.How does Aetrix verify that 74ACT16245DLRG4 is sourced from the original manufacturer or authorized distributors?
All 74ACT16245DLRG4 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 74ACT16245DLRG4 meets industry standards.
7.What is the process for return or replacement of 74ACT16245DLRG4?
All 74ACT16245DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16245DLRG4, 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 74ACT16245DLRG4 part is unused and in its original packaging.
Return procedure for 74ACT16245DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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