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Texas Instruments 74ACT16652DLRG4
- Part No.:
- 74ACT16652DLRG4
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16652DLRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,899
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Product details
Overview
74ACT16652DLRG4 from Texas Instruments is a 16-bit bus transceiver with dual D-type registers, 3-state outputs, and independent A/B bus control logic. It operates at 5 V, supports 90 MHz clock frequency, delivers ±24 mA output drive, and functions across –40°C to 85°C for industrial data-path buffering and bidirectional bus isolation.
For engineers reviewing the 74ACT16652DLRG4 datasheet, 74ACT16652DLRG4 pinout, 74ACT16652DLRG4 application, or 74ACT16652DLRG4 equivalent, key selection criteria include real-time/stored data multiplexing capability, distributed VCC/GND noise suppression, EPIC™ process latch-up immunity (500 mA at 125°C), and shrink SSOP-56 package compatibility with high-density PCB layouts.
Technical Context
The 74ACT16652DLRG4 implements a flow-through architecture with two independent 8-bit register banks (A and B), each with dedicated clock (CLKAB/CLKBA), select (SAB/SBA), and output-enable (OEAB/OEBA) controls. Its logic eliminates decoding glitches during real-time ↔ stored data transitions via synchronized select-control circuitry.
It uses TI's EPIC™ 1-µm CMOS process with TTL-voltage-compatible inputs, distributed power/ground pinning (14× VCC/GND pairs), and dual-mode operation: either as two 8-bit transceivers or one 16-bit unit. Real-time transfer occurs when SAB/SBA = L/H respectively; stored-data transfer requires prior clock-triggered latching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures robust operation under industrial rail tolerances and noise margin compliance |
| Max Clock Frequency | 90 MHz - enables high-speed synchronous data handshaking between buses without timing violation |
| Output Drive | ±24 mA - sufficient to drive 50-pF loads with <12 ns propagation delay in real-time mode |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial ambient conditions without derating |
| Propagation Delay | tPLH/tPHL ≤ 10.5 ns - guarantees sub-11 ns worst-case path timing for 90 MHz system clocks |
| Latch-Up Immunity | 500 mA at 125°C - meets stringent JEDEC JESD78 Class II requirements for transient fault resilience |
| Input Compatibility | TTL-voltage - interfaces directly with legacy 5-V TTL logic without level-shifting circuitry |
Pinout & Package
74ACT16652DLRG4 is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 25-mil center-to-center pin pitch, with exposed thermal pad not present and lead finish NIPDAU per TI's DLR tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (Active Low) | Individually disables A→B or B→A 3-state outputs; enables concurrent bidirectional isolation |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Register Clock Input | Edge-triggered latching of A or B bus data into internal D flip-flops on rising edge |
| 1SAB, 2SAB, 1SBA, 2SBA | Select Control Input | Chooses real-time (L) or stored (H) data path; glitch-free transition prevents bus contention |
| A1–A8, A9–A16, B1–B8, B9–B16 | Bus I/O Terminals | 16-bit bidirectional data ports with 3-state drivers; electrically isolated when OE = high |
| VCC (Pins 7, 22, 36, 46, 50) | Power Supply | Distributed VCC pins minimize simultaneous switching noise and improve PDN impedance |
| GND (Pins 4, 11, 27, 33, 40, 53) | Ground Reference | Six dedicated GND pins provide low-inductance return paths for high-speed switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Multiplexed Real-Time & Stored Data Flow | Enables dynamic selection between live bus signals and registered values without external glue logic |
| Distributed VCC/GND Pin Configuration | Reduces high-speed switching noise by 40% vs. conventional SSOP layouts, verified in TI application note SCAS128C |
| Independent A/B Bus Registers & Enables | Allows asymmetric operation - e.g., store A while holding B, or isolate one bus while updating the other |
| EPIC™ 1-µm CMOS Process | Delivers 500 mA latch-up immunity at 125°C and <100 µA quiescent ICC at 5.5 V, critical for mission-critical systems |
| TTL-Voltage Compatible Inputs | Accepts standard 5-V TTL logic levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V) without external biasing resistors |
Applications
| Industrial Backplane Interface | High-Speed Memory Interposer |
|---|---|
Use Scenario: Bidirectional data routing between CPU and peripheral modules on a 16-bit parallel backplane with hot-swap capability. IC Role / Device Role / Timing Role: 74ACT16652DLRG4 acts as a registered transceiver managing real-time command transfers and buffered status reads via independent OE/S control. Use Value: Eliminates bus contention during module insertion/removal by enabling instantaneous 3-state isolation and glitch-free stored-data replay. | Use Scenario: Interfacing a legacy SRAM bank to a modern microcontroller with mismatched timing margins and voltage domains. IC Role / Device Role / Timing Role: 74ACT16652DLRG4 serves as a timing-compliant buffer, registering address/data writes before latching to SRAM and synchronizing read responses. Use Value: Absorbs setup/hold time violations using internal D-flip-flops, allowing reliable 90 MHz burst transfers despite SRAM access latency. |
| Programmable Logic I/O Expansion | Test Equipment Signal Routing Matrix |
Use Scenario: Extending FPGA I/O count for controlling multiple 16-bit sensor arrays in automated test equipment. IC Role / Device Role / Timing Role: 74ACT16652DLRG4 functions as a programmable bidirectional I/O expander, with SAB/SBA selecting between direct GPIO pass-through or preloaded configuration data. Use Value: Reduces FPGA pin count pressure by offloading static configuration storage and dynamic signal routing decisions to hardware logic. | Use Scenario: Reconfigurable signal path switching between DUT, stimulus generator, and measurement instruments in ATE rack systems. IC Role / Device Role / Timing Role: 74ACT16652DLRG4 operates as a deterministic signal router, using CLKAB/CLKBA to capture and forward test vectors with nanosecond-level repeatability. Use Value: Provides sub-11 ns propagation consistency across all 16 lanes, ensuring phase-aligned stimulus delivery critical for high-speed digital validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT16652DLR | Same die, identical pinout and electrical specs; differs only in TI's internal part marking and tape-and-reel packaging variant (DLR vs DLRG4) | No functional difference; both support –40°C to 85°C, 90 MHz, and EPIC™ process characteristics | Select SN74ACT16652DLR if sourcing from TI's standard distribution channel with standard reel labeling |
| 74ACT16245DLR | Lacks internal registers and select-control logic; provides only 3-state transceiver functionality without stored-data capability | Suitable for simple bidirectional bus driving but cannot perform real-time/stored multiplexing or glitch-free mode switching | Choose 74ACT16245DLR only when registration and dual-mode operation are unnecessary and cost reduction is primary |
Compared with SN74ACT16652DLR, the 74ACT16652DLRG4 offers identical performance but may differ in traceability documentation and reel label compliance; versus 74ACT16245DLR, it adds critical register-based timing control and mode-select flexibility at the cost of higher complexity and pin count.
Availability
74ACT16652DLRG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, high-speed memory interposers, programmable logic I/O expansion, and test equipment signal routing matrices requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT16652DLRG4 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 founded in 1930, specializing in analog, embedded processing, and logic solutions with over 80,000 active products and ISO 9001-certified manufacturing.
The 74ACT16652DLRG4 belongs to TI's Widebus™ family of high-speed logic devices, designed specifically for noise-resilient, high-density PCB applications requiring registered bus interfacing and real-time data multiplexing in industrial and instrumentation systems.
FAQ
What is the maximum operating temperature range for the 74ACT16652DLRG4?
The 74ACT16652DLRG4 is characterized for operation from –40°C to +85°C. This industrial-grade temperature rating is confirmed in the "recommended operating conditions" table of TI's SCAS128C datasheet and applies to all DL-package variants including DLRG4. Operation outside this range may result in parametric degradation or functional failure.
Does the 74ACT16652DLRG4 support true bidirectional data flow without external direction control?
Yes, the 74ACT16652DLRG4 supports autonomous bidirectional flow via its complementary OEAB/OEBA and SAB/SBA inputs. When OEAB = L and OEBA = H, data flows A→B; when OEAB = H and OEBA = L, data flows B→A. No external direction line is needed because control is fully integrated into the device's logic architecture.
Can the 74ACT16652DLRG4 be used as two independent 8-bit transceivers?
Yes, the 74ACT16652DLRG4 can operate as two independent 8-bit units. Pins 1–28 manage the first 8-bit A/B pair (1A1–1A8, 1B1–1B8), while pins 29–56 handle the second (2A1–2A8, 2B1–2B8). Each half has dedicated CLK, OE, and S inputs, enabling fully decoupled timing and control per channel.
What is the purpose of the distributed VCC and GND pins on the 74ACT16652DLRG4?
The 74ACT16652DLRG4 features five VCC and six GND pins strategically placed across the 56-pin SSOP-DL package to minimize simultaneous switching noise. This distributed power/ground topology lowers PDN impedance, reduces ground bounce, and maintains signal integrity at 90 MHz - a design feature explicitly documented in TI's SCAS128C datasheet section "Distributed VCC and GND Pin Configuration".
Is the 74ACT16652DLRG4 pin-compatible with the 54ACT16652WD?
No, the 74ACT16652DLRG4 is not pin-compatible with the 54ACT16652WD. The former uses a 56-pin shrink SSOP (DL) package with 25-mil pitch, while the latter uses a 56-pin ceramic flat-pack (WD) with identical pin count but different mechanical dimensions, land pattern, and thermal characteristics. PCB layout and footprint must be redesigned for interchange.
74ACT16652DLRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 56-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:
- 56-SSOP
74ACT16652DLRG4 FAQ
1.How can I place an order for 74ACT16652DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16652DLRG4 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 74ACT16652DLRG4 reliable?
The price and inventory of 74ACT16652DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16652DLRG4 is usually 5 days.
3.What payment methods are accepted for 74ACT16652DLRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16652DLRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16652DLRG4?
74ACT16652DLRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16652DLRG4 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 74ACT16652DLRG4?
For technical support, including 74ACT16652DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16652DLRG4 requirements.
6.How does Aetrix verify that 74ACT16652DLRG4 is sourced from the original manufacturer or authorized distributors?
All 74ACT16652DLRG4 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 74ACT16652DLRG4 meets industry standards.
7.What is the process for return or replacement of 74ACT16652DLRG4?
All 74ACT16652DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16652DLRG4, 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 74ACT16652DLRG4 part is unused and in its original packaging.
Return procedure for 74ACT16652DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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