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Texas Instruments SN74ALVCH16952DLR
- Part No.:
- SN74ALVCH16952DLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH16952DLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,339
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Product details
Overview
SN74ALVCH16952DLR 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 banks, clock-enable control per direction, bus-hold circuitry on all data inputs, and operates across –40°C to 85°C. It is used in high-speed board-level interconnects such as memory expansion interfaces and FPGA-to-ASIC data bridges.
For engineers reviewing the SN74ALVCH16952DLR datasheet, SN74ALVCH16952DLR pinout, SN74ALVCH16952DLR application, or SN74ALVCH16952DLR equivalent, key selection criteria include its dual-clock-enable architecture, guaranteed 150-MHz clock frequency at 2.5 V/3.3 V, bus-hold elimination of external pull resistors, and DL-package thermal impedance of 74°C/W for thermally constrained PCB layouts.
Technical Context
The SN74ALVCH16952DLR implements two independent 8-bit D-type flip-flop banks-one for A→B and one for B→A data paths-each controlled by dedicated clock (CLKAB/CLKBA), clock-enable (CLKENAB/CLKENBA), and output-enable (OEAB/OEBA) signals. Data is latched on the low-to-high clock transition when clock-enable is low.
Its bus-hold circuitry actively maintains unused data inputs at valid logic levels without external components, and its 3-state outputs support hot-swap compatibility and bus contention avoidance. The device uses TI's EPIC™ submicron CMOS process and meets JESD 17 latch-up immunity (>500 mA) and MIL-STD-883 ESD ratings (>2000 V HBM).
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) |
| Max Clock Frequency | 150 MHz - enables high-throughput synchronous data transfer in real-time control and communication subsystems |
| Propagation Delay (tpd) | 1 ns (min) to 4.6 ns (max) at 3.3 V - ensures tight timing margins in high-speed register-to-register transfers |
| Bus-Hold Current | ±25 µA to ±75 µA depending on VCC - eliminates need for external pullup/pulldown resistors on floating data lines |
| Output Drive | ±24 mA at 3 V - drives standard TTL loads and multiple CMOS inputs without buffering |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications including motor control and PLC I/O modules |
| Input Capacitance (Ci) | 3.5 pF - minimizes signal loading on upstream drivers and preserves edge integrity in dense routing |
Pinout & Package
SN74ALVCH16952DLR is packaged in a 56-pin Plastic Shrink Small-Outline (DL) package, 300-mil body width, 1.2-mm max height, with 0.5-mm pitch and exposed thermal pad (per JEDEC MO-153). Pin 1 identifier located at top-left corner with quadrant Q1 orientation in tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Controls 3-state output drivers per 8-bit port; tying OE to VCC via pullup ensures high-Z during power-up |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Register Clock (rising-edge) | Latches data from A to B or B to A on low-to-high transition; requires clean, monotonic edges per ∆t/∆v ≤ 10 ns/V |
| 1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA | Clock Enable (active-low) | Gates clock propagation to registers; must be low before CLK edge to avoid metastability or missed latch |
| A1–A8, B1–B8 (x2) | Bidirectional Data I/O | 16-bit A-side and 16-bit B-side ports with integrated bus-hold; no external termination required |
| VCC, GND (x8 total) | Power Distribution | Multiple VCC/GND pairs minimize simultaneous switching noise and improve PSRR across wide frequency range |
Key Features
| Feature | Design Value |
|---|---|
| Dual 8-bit registered paths | Enables independent A↔B data flow control-supports split-bus architectures like CPU local bus ↔ DMA controller |
| Integrated bus-hold on all data inputs | Eliminates 32 external pull resistors, reduces BOM count and layout area, and prevents floating-input-induced glitches |
| EPIC™ submicron CMOS process | Delivers low ICC (40 µA typical) and high noise immunity while maintaining 150-MHz operation across full VCC range |
| 3.6-V absolute maximum rating | Allows safe operation during transient overvoltage events (e.g., hot-plug, supply sequencing faults) without latch-up |
| JEDEC MO-153-compliant TSSOP-DL | Ensures mechanical compatibility with automated assembly equipment and standard reflow profiles (MSL-1, 260°C peak) |
Applications
| Industrial Backplane Interconnect | FPGA I/O Expansion Bridge |
|---|---|
Use Scenario: Bidirectional data transfer between microcontroller host and modular I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Registered transceiver synchronizing asynchronous card data into the controller's clock domain using CLKAB/CLKBA. Use Value: Bus-hold prevents spurious reads during card insertion/removal; 150-MHz capability supports >1.2-Gbps aggregate throughput across 16 lanes. | Use Scenario: Extending limited FPGA I/O pins to interface with external SRAM, flash, or ADC/DAC peripherals. IC Role / Device Role / Timing Role: Level-shifting and registered buffering between 1.8-V FPGA I/O banks and 3.3-V memory devices. Use Value: Dual VCC range (1.65–3.6 V) enables seamless voltage translation; low tpd (<4.6 ns) preserves setup/hold timing for fast memory access cycles. |
| Automotive Domain Controller Hub | Test Equipment Data Acquisition Interface |
Use Scenario: Aggregating sensor data streams from multiple ECUs onto a central domain controller bus. IC Role / Device Role / Timing Role: Synchronized data capture node registering time-critical CAN/LIN auxiliary signals before forwarding to main processor. Use Value: –40°C to +85°C rating meets automotive under-hood requirements; bus-hold secures inputs during ECU power cycling events. | Use Scenario: High-fidelity digital pattern capture between test head and digitizer in automated test equipment (ATE). IC Role / Device Role / Timing Role: Registered repeater isolating tester logic from DUT load while preserving signal integrity and timing alignment. Use Value: Low Cio (8.5 pF) minimizes capacitive loading on high-speed test vectors; 24-mA drive sustains signal swing across long probe cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH162245DLR | Non-registered, octal-direction-controlled transceiver; no clock or register functionality | Suitable only for simple level-shifting or bus isolation-not for synchronous data capture or pipeline staging | Select when timing registration is unnecessary and lower propagation delay (2.1 ns) is prioritized over storage capability |
| SN74LVC16245ADGGR | Non-registered 16-bit transceiver; lacks bus-hold and operates up to 3.6 V but not below 2.7 V | Requires external pull resistors; unsuitable for 1.65–2.7 V systems or floating-input environments | Choose for cost-sensitive, non-industrial designs where VCC ≥ 2.7 V and board space allows discrete termination |
Compared with SN74ALVCH16952DLR, SN74ALVCH162245DLR offers faster raw throughput but no data synchronization, while SN74LVC16245ADGGR reduces gate count but increases BOM complexity and narrows voltage operating range-making SN74ALVCH16952DLR the sole choice for registered, bus-hold-enabled, wide-VCC industrial interconnects.
Availability
SN74ALVCH16952DLR is available at Aetrix Electronics and suitable for industrial backplane interconnects, FPGA I/O expansion bridges, automotive domain controller hubs, and test equipment data acquisition interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ALVCH16952DLR 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 IC design.
The SN74ALVCH16952DLR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for high-speed, low-voltage, registered data transfer in industrial, automotive, and communications infrastructure systems.
FAQ
What is the recommended power-up sequence for SN74ALVCH16952DLR to ensure high-impedance outputs?
TI specifies that OE inputs must be held high (via pullup to VCC) during power-up to guarantee 3-state outputs. For SN74ALVCH16952DLR, use a minimum pullup resistor value determined by the driver's current-sinking capability-typically 4.7 kΩ to 10 kΩ suffices for most 3.3-V systems. This prevents bus contention before firmware initializes control signals.
Does SN74ALVCH16952DLR support mixed-voltage operation between its A and B ports?
No-SN74ALVCH16952DLR has a single VCC pin shared across all I/Os and logic. Both A and B ports operate at the same VCC potential (1.65–3.6 V). Voltage translation between disparate domains requires external level shifters; the device itself does not provide dual-supply or auto-sensing translation.
Can SN74ALVCH16952DLR be used as two independent 8-bit transceivers?
Yes. SN74ALVCH16952DLR contains two fully independent 8-bit register banks: one for A1–A8 ↔ B1–B8 (controlled by CLKAB/CLKENAB/OEAB), and another for A9–A16 ↔ B9–B16 (controlled by CLKBA/CLKENBA/OEBA). Each bank functions autonomously, enabling split-bus configurations without cross-talk.
What is the purpose of the bus-hold circuitry on SN74ALVCH16952DLR data inputs?
The bus-hold circuitry on SN74ALVCH16952DLR actively maintains each unused or floating data input at its last-valid logic state using weak feedback-eliminating the need for external pullup/pulldown resistors. This reduces BOM cost, saves PCB area, and prevents undefined states during hot-swap or partial initialization sequences.
Is SN74ALVCH16952DLR pin-compatible with other 56-pin TSSOP transceivers like SN74ALVCH162245DLR?
No. Although both use 56-pin TSSOP packages (DL), SN74ALVCH16952DLR and SN74ALVCH162245DLR have fundamentally different pinouts: SN74ALVCH16952DLR dedicates pins to dual clock/enable controls and register logic, while SN74ALVCH162245DLR allocates pins for direction-control and non-registered I/O. PCB layout is not interchangeable.
SN74ALVCH16952DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SSOP
SN74ALVCH16952DLR FAQ
1.How can I place an order for SN74ALVCH16952DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16952DLR 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 SN74ALVCH16952DLR reliable?
The price and inventory of SN74ALVCH16952DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16952DLR is usually 5 days.
3.What payment methods are accepted for SN74ALVCH16952DLR?
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4.How is shipping managed for SN74ALVCH16952DLR?
SN74ALVCH16952DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH16952DLR 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 SN74ALVCH16952DLR?
For technical support, including SN74ALVCH16952DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16952DLR requirements.
6.How does Aetrix verify that SN74ALVCH16952DLR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16952DLR 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 SN74ALVCH16952DLR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16952DLR?
All SN74ALVCH16952DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16952DLR, 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 SN74ALVCH16952DLR part is unused and in its original packaging.
Return procedure for SN74ALVCH16952DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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