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Texas Instruments SN74ALVCH16952DGGR
- Part No.:
- SN74ALVCH16952DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVCH16952DGGR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,192
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Product details
Overview
SN74ALVCH16952DGGR from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between two 16-bit buses (A and B) in 1.65-V to 3.6-V systems. It features dual 8-bit register sets, bus-hold circuitry on all data inputs, and independent clock-enable and output-enable controls per direction. It is used in high-speed board-level interconnects such as memory expansion, FPGA-to-ASIC bridging, and backplane interface buffering.
For engineers reviewing the SN74ALVCH16952DGGR datasheet, SN74ALVCH16952DGGR pinout, SN74ALVCH16952DGGR application, or SN74ALVCH16952DGGR equivalent, key selection criteria include VCC operating range (1.65–3.6 V), clock frequency up to 150 MHz, bus-hold input retention, 56-pin TSSOP (DGG) package, and -40°C to 85°C industrial temperature rating.
Technical Context
The SN74ALVCH16952DGGR implements two independent 8-bit D-type flip-flop banks-one for A→B and one for B→A data flow-each synchronized to its own clock (CLKAB/CLKBA) and enabled by dedicated clock-enable (CLKENAB/CLKENBA) and output-enable (OEAB/OEBA) signals. Data is latched on the low-to-high transition of the respective clock when its clock-enable is low.
Its bus-hold circuitry actively maintains unused data inputs at valid logic levels without external pullup/pulldown resistors, reducing BOM count and layout complexity. All control inputs must be tied to VCC or GND to prevent floating states, and OE should be pulled up to VCC during power-up/down to ensure 3-state default behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing (e.g., 1.8-V FPGA to 3.3-V peripheral). |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded and communications equipment. |
| Max Clock Frequency | 150 MHz - enables high-throughput data transfer in synchronous bus architectures. |
| Bus-Hold Current | ±25 µA to ±75 µA (depending on VCC) - sustains stable logic state on un-driven A/B port inputs without external resistors. |
| Propagation Delay (tpd) | 1 ns (min) to 4.6 ns (max) - ensures tight timing margins in high-speed register-to-register paths. |
| Output Drive Strength | ±24 mA at 3.0 V - sufficient to drive 50-pF loads across PCB traces or multiple CMOS inputs. |
| Input/Output Capacitance | Ci = 3.5 pF (control), Cio = 8.5 pF (data ports) - minimizes signal integrity degradation in dense routing. |
Pinout & Package
SN74ALVCH16952DGGR uses a 56-pin Thin Shrink Small-Outline Package (TSSOP-DGG), 13.9 mm × 7.9 mm × 1.2 mm max height, RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Controls 3-state output drivers for corresponding A↔B data channels; OE tied high disables outputs to high-Z. |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Clock Input (rising-edge triggered) | Latches data from A to B (CLKAB) or B to A (CLKBA); requires synchronous edge alignment with CLKEN. |
| 1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA | Clock Enable (active-low) | Gates clock sampling - data only latched when CLKEN is low; allows gated register updates. |
| 1A1–1A8, 2A1–2A8, 1B1–1B8, 2B1–2B8 | Data I/O Ports | Two 8-bit bidirectional data buses (A and B); each port supports bus-hold on all pins. |
| VCC, GND (multiple) | Power & Ground | Eight dedicated VCC/GND pairs minimize switching noise and improve PSRR across high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-Hold Circuitry | Eliminates need for 32 external pullup/pulldown resistors on A/B data lines, reducing component count and board area. |
| Dual Independent Register Banks | Enables simultaneous A→B and B→A registered transfers - supports full-duplex buffered communication without arbitration. |
| Wide VCC Range (1.65–3.6 V) | Allows direct interfacing between 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| High-Speed Timing (150 MHz) | Meets timing requirements for DDR memory buffers, high-speed test interfaces, and FPGA I/O expansion. |
| Industrial Temperature Rating | Validated operation from -40°C to +85°C ensures reliability in base station, industrial PLC, and automotive under-hood applications. |
Applications
| Memory Expansion Interface | FPGA-to-ASIC Bridging |
|---|---|
Use Scenario: Expanding external SRAM or Flash memory width from 8-bit to 16-bit on a microcontroller-based system. IC Role / Device Role / Timing Role: Registered transceiver acting as synchronous data latch and bus isolator between MCU address/data bus and memory array. Use Value: Enables deterministic setup/hold timing via clocked registers, while bus-hold prevents glitches during memory access arbitration. |
Use Scenario: Interfacing a Xilinx Artix-7 FPGA with a legacy ASIC requiring registered 16-bit parallel control and status signals. IC Role / Device Role / Timing Role: Bidirectional registered buffer providing clock-domain crossing and voltage translation between 1.8-V FPGA I/O and 3.3-V ASIC interface. Use Value: Eliminates need for discrete level shifters and external latches; built-in bus-hold maintains valid state during FPGA configuration reset. |
| Backplane Data Buffering | Test Equipment Signal Conditioning |
Use Scenario: Isolating and retiming parallel control signals across a 10-cm backplane in modular instrumentation chassis. IC Role / Device Role / Timing Role: Registered repeater that reclocks and drives long-trace signals to overcome skew and attenuation. Use Value: 4.6 ns max propagation delay and 150 MHz clock support maintain timing integrity across noisy backplane environments. |
Use Scenario: Conditioning parallel digital stimulus/response signals in automated test equipment (ATE) with variable voltage rails. IC Role / Device Role / Timing Role: Voltage-flexible transceiver enabling programmable I/O voltage adaptation (1.65–3.6 V) for DUT interface calibration. Use Value: Single device replaces multiple fixed-VCC transceivers, simplifying test head design and supporting multi-DUT voltage standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16952DGGR | Lower drive strength (±24 mA @ 3.3 V vs. ±32 mA for LVC), identical pinout and logic function. | Optimized for lower-power 3.3-V-only systems; lacks 1.65-V minimum VCC support. | Select when operating exclusively at 3.3 V and lower static current (<20 µA ICC) is prioritized over wide-VCC flexibility. |
| 74ALVCH162245DGGR | Non-registered, 16-bit non-inverting transceiver; no clock or register functionality. | Suitable only for simple level-shifting or bus isolation without timing control. | Choose only if clocked registration is unnecessary and minimal propagation delay (2.1 ns) is critical. |
Compared with SN74LVC16952DGGR and 74ALVCH162245DGGR, the SN74ALVCH16952DGGR uniquely delivers registered bidirectional data flow across 1.65–3.6 V, making it irreplaceable in synchronous, mixed-voltage, or glitch-immune bus extension designs where timing determinism and input retention are required.
Availability
SN74ALVCH16952DGGR is available at Aetrix Electronics and suitable for memory expansion, FPGA bridging, backplane buffering, and ATE signal conditioning requiring stable component supply across industrial temperature and mixed-voltage environments.
Supply support for SN74ALVCH16952DGGR 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 decades of expertise in high-reliability interface ICs.
The SN74ALVCH16952DGGR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage, registered bus interfacing in industrial and communications infrastructure.
FAQ
What is the recommended power-up sequence for SN74ALVCH16952DGGR?
TI specifies that OE inputs must be held high (via pullup to VCC) during power-up and power-down to guarantee 3-state outputs. For SN74ALVCH16952DGGR, tie OEAB and OEBA to VCC through ≥10-kΩ resistors. VCC should ramp monotonically; no sequencing between VCC and control inputs is required beyond maintaining OE high until stable operation begins.
Does SN74ALVCH16952DGGR support hot-swap or live-insertion?
SN74ALVCH16952DGGR is not rated for hot-swap operation. Its absolute maximum ratings do not include powered insertion into a live backplane. The device lacks Ioff protection - when VCC = 0 V, I/O pins may sink current if driven externally, risking damage. Use only in systems with controlled power sequencing.
Can SN74ALVCH16952DGGR operate at 1.5-V VCC?
No. SN74ALVCH16952DGGR has a minimum specified VCC of 1.65 V per its recommended operating conditions. Operation below 1.65 V is outside characterization and may result in undefined timing, reduced noise margin, or failure to meet bus-hold or output drive specifications. Do not use at 1.5 V.
How does bus-hold work on SN74ALVCH16952DGGR data inputs?
Each A and B port input in SN74ALVCH16952DGGR includes an internal weak feedback resistor (~100 kΩ) that holds the pin at its last valid logic level when floating. This eliminates external biasing components. Bus-hold current ranges from ±25 µA to ±75 µA depending on VCC and input voltage, ensuring robust noise immunity without loading the driving source.
Is SN74ALVCH16952DGGR pin-compatible with SN74ALVCH162245DGGR?
No. Although both are 56-pin TSSOP transceivers, SN74ALVCH16952DGGR has 24 control signals (clocks, enables) and 32 I/Os, while SN74ALVCH162245DGGR has only 2 control inputs and 32 I/Os. Their pinouts differ significantly - e.g., CLKAB/CLKBA occupy pins 2/27 in SN74ALVCH16952DGGR but are absent in SN74ALVCH162245DGGR - making them incompatible at the PCB layout level.
SN74ALVCH16952DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
SN74ALVCH16952DGGR FAQ
1.How can I place an order for SN74ALVCH16952DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16952DGGR 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 SN74ALVCH16952DGGR reliable?
The price and inventory of SN74ALVCH16952DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16952DGGR is usually 5 days.
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Once your SN74ALVCH16952DGGR 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 SN74ALVCH16952DGGR?
For technical support, including SN74ALVCH16952DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16952DGGR requirements.
6.How does Aetrix verify that SN74ALVCH16952DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16952DGGR 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 SN74ALVCH16952DGGR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16952DGGR?
All SN74ALVCH16952DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16952DGGR, 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 SN74ALVCH16952DGGR part is unused and in its original packaging.
Return procedure for SN74ALVCH16952DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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