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Texas Instruments 74ACT16245DGGR
- Part No.:
- 74ACT16245DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ACT16245DGGR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,621
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Product details
Overview
74ACT16245DGGR 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.
For engineers reviewing the 74ACT16245DGGR datasheet, 74ACT16245DGGR pinout, 74ACT16245DGGR application, or 74ACT16245DGGR equivalent, key selection criteria include bidirectional bus isolation timing (tPLH/tPHL ≤ 10.5 ns), 3-state enable control logic (G and DIR inputs), TTL-compatible inputs, and TSSOP-48 package compatibility with high-density routing constraints.
Technical Context
The 74ACT16245DGGR implements dual-octal transceiver architecture with independent direction (DIR) and output-enable (G) controls per 8-bit port pair. Its EPIC™ CMOS process enables 500-mA latch-up immunity and distributed VCC/GND pins to suppress high-speed switching noise.
Signal flow is strictly directional: when G = L and DIR = L, data transfers from B bus to A bus; when G = L and DIR = H, data flows from A bus to B bus; G = H forces all outputs into high-impedance state, isolating both buses. No internal pull-ups or level-shifting circuitry is present - all I/Os are 5-V TTL-voltage compatible.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and CMOS logic rails without level translation. |
| Operating Temperature | –40°C to +85°C - qualified for commercial/industrial environments, excluding extended military or automotive extremes. |
| Output Drive | ±24 mA - sufficient to directly drive standard 50-pF bus loads at full speed without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 10.5 ns @ 5 V - enables reliable operation in 50-MHz+ synchronous bus systems with margin. |
| Input Compatibility | TTL-voltage - accepts 0.8 V (VIL) and 2.0 V (VIH) thresholds, eliminating need for external voltage translators. |
| Power Dissipation | 0.85 W max (TSSOP) - requires no forced-air cooling in typical board-level thermal environments. |
| ESD Immunity | ≥2 kV HBM - meets basic handling robustness requirements for assembly and field service. |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5-mm lead pitch, gull-wing leads, moisture sensitivity level 1 (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per octal section: DIR = H enables A→B; DIR = L enables B→A. |
| 1G, 2G | Output enable input | Active-low: G = L enables transceiver; G = H places all associated A/B outputs in high-Z state. |
| 1A1–1A8, 2A1–2A8 | Port A inputs/outputs | First and second octal A-side I/O terminals; bidirectional when enabled and direction-controlled. |
| 1B1–1B8, 2B1–2B8 | Port B inputs/outputs | First and second octal B-side I/O terminals; functionally mirrored to A-side under DIR logic. |
| VCC (Pins 7, 18, 29, 40) | Power supply | Distributed VCC pins minimize simultaneous switching noise and improve power integrity across 16-bit width. |
| GND (Pins 4, 10, 15, 21, 26, 32, 37, 43) | Ground reference | Eight dedicated GND pins provide low-inductance return paths for all 16 drivers and receivers. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposite sides of package to eliminate layer jumps and reduce trace crossovers on PCB. |
| Distributed VCC/GND | Four VCC and eight GND pins placed symmetrically to lower ground bounce and supply rail collapse during fast switching. |
| EPIC™ CMOS process | 1-μm fabrication delivering 500-mA latch-up immunity at 125°C - critical for reliability in noisy industrial power domains. |
| 3-state bus isolation | Independent G control per octal group allows selective disabling of 8-bit segments without affecting adjacent data lanes. |
| TTL-input compatibility | Accepts standard 5-V TTL logic levels (0.8 V/2.0 V thresholds) - eliminates need for external level shifters in mixed-logic systems. |
Applications
| Industrial PLC Backplane Interface | Legacy ISA Bus Extension |
|---|---|
Use Scenario: Interfacing microcontroller-based CPU modules to modular I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional data bridge between local processor bus and distributed I/O backplane, enabling real-time status readback and command writeback. Use Value: Flow-through pinout simplifies 16-bit parallel routing across multi-layer backplanes; ±24 mA drive sustains signal integrity over 15-cm ribbon cable runs. | Use Scenario: Extending legacy ISA bus signals between motherboard and add-in peripheral cards in test instrumentation racks. IC Role / Device Role / Timing Role: Isolates and buffers address/data/control lines during hot-swap events or card insertion/removal sequences. Use Value: Independent G control per octal group permits selective isolation of address vs. data lanes, preventing bus contention during configuration cycles. |
| Automated Test Equipment (ATE) Fixture | Embedded Data Acquisition System |
Use Scenario: Routing sensor data from multiple analog front-end modules to a central FPGA acquisition engine in semiconductor wafer probers. IC Role / Device Role / Timing Role: Synchronizes parallel 16-bit sample streams from up to four ADC banks into shared memory interface. Use Value: Propagation delay ≤10.5 ns ensures sub-100-ns inter-channel skew across all 16 bits - essential for coherent multi-channel sampling. | Use Scenario: Connecting ARM Cortex-M7 MCU local bus to external SRAM and flash memory in ruggedized environmental monitoring nodes. IC Role / Device Role / Timing Role: Provides controlled bus turnaround during memory read/write cycles, preventing data corruption during direction reversal. Use Value: DIR-controlled bidirectional operation eliminates need for separate transmit/receive buffers, reducing component count and board area by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC16245APAG | 3.3-V only supply (1.65–3.6 V); lower drive (±24 mA @ 3.3 V); 1.2-V logic compatible inputs. | Requires level translation when interfacing with 5-V legacy buses; unsuitable for direct replacement in 5-V systems. | Select only if migrating entire system to 3.3-V logic and redesigning power distribution. |
| SN74ABT16245DGGR | Higher drive (±64 mA); faster propagation (tPLH ≤ 4.5 ns); ABT family with bus-hold inputs. | Better suited for driving long traces or heavy capacitive loads; bus-hold eliminates need for external pull-ups on unused inputs. | Prefer for new designs demanding higher speed or noise immunity; not drop-in due to different DC characteristics and timing margins. |
Compared with 74ACT16245DGGR, the 74LVC16245APAG requires full voltage domain migration and cannot operate at 5 V, while the SN74ABT16245DGGR offers superior speed and drive but introduces bus-hold behavior that may conflict with existing termination schemes - both require schematic and layout review before substitution.
Availability
74ACT16245DGGR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, legacy ISA bus extensions, automated test equipment fixtures, embedded data acquisition systems, and ruggedized environmental monitoring requiring stable component supply across extended product lifecycles.
Supply support for 74ACT16245DGGR 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74ACT16245DGGR belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-resilient, high-density parallel data transfer in industrial control and legacy computing infrastructure.
FAQ
What is the maximum operating temperature range for the 74ACT16245DGGR?
The 74ACT16245DGGR is characterized for operation from –40°C to +85°C. This commercial/industrial temperature range is specified in the official Texas Instruments datasheet SCAS097B and validated across production lots. The device uses EPIC™ CMOS technology to maintain parameter stability across this full range, with no derating required up to 85°C ambient. Operation outside this range is not guaranteed and may result in timing violations or increased leakage current.
Does the 74ACT16245DGGR support 3.3-V logic inputs?
No, the 74ACT16245DGGR does not support 3.3-V logic inputs natively. Its input thresholds are TTL-compatible: VIH = 2.0 V minimum and VIL = 0.8 V maximum at VCC = 5 V. Applying 3.3-V logic signals directly risks marginal or incorrect recognition of HIGH states, especially under voltage tolerance or temperature variation. For mixed-voltage systems, a level translator such as the TXB0108 or discrete resistor divider must be used upstream of the 74ACT16245DGGR inputs.
How many VCC and GND pins does the 74ACT16245DGGR have in its TSSOP-48 package?
The 74ACT16245DGGR in the DGG (TSSOP-48) package has four VCC pins (pins 7, 18, 29, and 40) and eight GND pins (pins 4, 10, 15, 21, 26, 32, 37, and 43). This distributed power/ground configuration is explicitly documented in the TI mechanical drawing DGG0048A and electrical schematics, and is designed to minimize simultaneous switching noise across the 16-bit bus width.
Can the 74ACT16245DGGR be used as a unidirectional buffer instead of a bidirectional transceiver?
Yes, the 74ACT16245DGGR can be configured as a unidirectional buffer by fixing the DIR input to a constant logic level (e.g., DIR = H for A→B only) and using G to enable/disable the path. In this mode, it functions identically to two independent octal buffers - each with 24-mA drive strength and 10.5-ns propagation delay. No internal modification or external wiring changes are needed beyond tying DIR to VCC or GND via a pull-up/down resistor.
Is the 74ACT16245DGGR RoHS compliant and lead-free?
Yes, the 74ACT16245DGGR is RoHS compliant and lead-free. Per TI's Package Option Addendum (dated 15-Jul-2026), the part carries "Yes" for RoHS and "NIPDAU" (nickel-palladium-gold) lead finish. It is rated MSL Level-1 with unlimited floor life at ≤30°C/60% RH and qualifies for standard 260°C peak reflow profiles. The marking "74ACT16245DGGR" and suffix ".A" variants both meet these requirements.
74ACT16245DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
74ACT16245DGGR FAQ
1.How can I place an order for 74ACT16245DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16245DGGR 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 74ACT16245DGGR reliable?
The price and inventory of 74ACT16245DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16245DGGR is usually 5 days.
3.What payment methods are accepted for 74ACT16245DGGR?
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4.How is shipping managed for 74ACT16245DGGR?
74ACT16245DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16245DGGR 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 74ACT16245DGGR?
For technical support, including 74ACT16245DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16245DGGR requirements.
6.How does Aetrix verify that 74ACT16245DGGR is sourced from the original manufacturer or authorized distributors?
All 74ACT16245DGGR 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 74ACT16245DGGR meets industry standards.
7.What is the process for return or replacement of 74ACT16245DGGR?
All 74ACT16245DGGR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16245DGGR, 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 74ACT16245DGGR part is unused and in its original packaging.
Return procedure for 74ACT16245DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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