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Texas Instruments SN74ALVCH16952DL
- Part No.:
- SN74ALVCH16952DL
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH16952DL.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,838
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Product details
Overview
SN74ALVCH16952DL from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between A and B buses in 1.65-V to 3.6-V systems. It features dual 8-bit register banks, bus-hold circuitry on all data inputs, and independent clock-enable and output-enable controls per direction. Used in high-speed memory interface buffering and FPGA-to-ASIC interconnects where registered data staging and bus contention avoidance are required.
For engineers reviewing the SN74ALVCH16952DL datasheet, SN74ALVCH16952DL pinout, SN74ALVCH16952DL application, or SN74ALVCH16952DL equivalent, key selection criteria include VCC operating range (1.65–3.6 V), clock frequency up to 150 MHz, bus-hold input retention, 3-state output drive capability (±24 mA at 3 V), and DL-package thermal impedance (74 °C/W).
Technical Context
This device implements two independent 8-bit D-type flip-flop banks-one for A→B and one for B→A data flow-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, and outputs enter high-impedance state when output-enable is high.
Bus-hold circuitry actively maintains unused data inputs at valid logic levels without external pullup/pulldown resistors. The design supports hot-insertion-safe operation via OE tie-high with pullup resistor 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 - Enables interoperability across mixed-voltage 1.8-V, 2.5-V, and 3.3-V logic domains. |
| Max Clock Frequency | 150 MHz - Supports high-throughput data staging in memory controllers and programmable logic interfaces. |
| Output Drive | ±24 mA at 3 V - Sufficient to drive 50-pF loads with <4.6 ns propagation delay (tpd), enabling clean signal integrity in dense PCB layouts. |
| Bus-Hold Current | ±75 µA at 3 V - Actively holds floating inputs without external components, reducing BOM count and layout complexity. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems including motor control and communications infrastructure. |
| Input Leakage | ±5 µA max at 3.6 V - Minimizes standby power impact in battery-backed or low-power subsystems. |
| Thermal Impedance (θJA) | 74 °C/W (DL package) - Enables reliable operation at full speed without forced airflow in compact enclosures. |
Pinout & Package
SN74ALVCH16952DL uses a 56-pin DL package (300-mil shrink small-outline), 13.9 mm × 7.9 mm body, 1.2 mm max height, with 0.5-mm pitch leads and gull-wing terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output-enable control (active-low) | Individually disables A↔B port outputs into high-impedance state; OE tied to VCC via pullup ensures safe power-up state. |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Register clock input (rising-edge triggered) | Latches data from A to B or B to A on low-to-high transition; requires stable edge timing per tsu/th specs. |
| 1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA | Register clock-enable (active-low) | Gates clock action - clock ignored when high; enables synchronous gating of data capture windows. |
| A1–A8, B1–B8 (x2 sets) | Bidirectional data I/O ports | Each port pair (e.g., 1A1/1B1) connects to separate 8-bit buses; bus-hold applies to all A/B pins. |
| VCC, GND (x8 total) | Power distribution network | Distributed VCC/GND pins minimize switching noise and improve PSRR; decoupling required per pin group. |
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 8-bit register banks | Enables flexible configuration as two independent 8-bit transceivers or one synchronized 16-bit path with staggered enable control. |
| Independent CLKEN per channel | Allows selective registration of data subsets - e.g., only high-byte latching while low-byte passes transparently. |
| 3-state output control per port | Prevents bus contention during multi-master arbitration; OE polarity and timing ensure glitch-free bus release. |
| EPIC™ submicron CMOS process | Delivers low ICC (40 µA typical) and high noise immunity (200 V MM ESD), supporting robust operation in electrically noisy environments. |
Applications
| Memory Interface Buffering | FPGA-to-ASIC Interconnect |
|---|---|
Use Scenario: Isolating DDR SDRAM address/control bus from a microcontroller with mismatched timing margins. IC Role / Device Role / Timing Role: Registered transceiver staging control signals with clock-aligned capture and 3-state isolation during refresh cycles. Use Value: Eliminates setup/hold violations using internal registers; bus-hold prevents floating states during controller reset. | Use Scenario: Bridging configurable logic (FPGA) I/O banks to fixed-function ASIC peripherals operating at different voltage levels. IC Role / Device Role / Timing Role: Voltage-tolerant bidirectional buffer with independent A/B clocking to synchronize data transfers across clock domains. Use Value: Supports 1.8-V FPGA core and 3.3-V ASIC I/O simultaneously; 150-MHz clock rate matches high-speed SerDes link rates. |
| Industrial Backplane Interface | Test Equipment Signal Routing |
Use Scenario: Managing shared data bus among multiple PLC modules in a modular automation rack. IC Role / Device Role / Timing Role: Registered bus transceiver providing deterministic latency and contention-free access via OE arbitration. Use Value: Dual OE/CLKEN controls allow precise time-slicing of bus ownership; –40°C to +85°C rating ensures field reliability. | Use Scenario: Reconfigurable signal path routing in automated test equipment (ATE) for DUT interface adaptation. IC Role / Device Role / Timing Role: Programmable 16-bit data switch with registered sampling to align stimulus/response timing across channels. Use Value: Independent clock enables phase-aligned capture of parallel test vectors; 3-state outputs support multiplexed probe connections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH162245DGGR | Non-registered 16-bit transceiver; no clock or register functionality; higher drive (±64 mA). | Suitable only for transparent, non-timed data transfer; cannot replace clocked staging or hold timing requirements. | Select only if system does not require registered sampling or clock-domain bridging. |
| SN74LVC16245ADGGR | Registered transceiver but lacks bus-hold; operates 1.65–3.6 V; lower max clock (100 MHz); no independent CLKEN per channel. | Requires external pullups on unused inputs; less flexible clock gating; limited to lower-speed interconnects. | Choose when bus-hold is unnecessary and cost is prioritized over feature set and timing margin. |
Compared with SN74ALVCH16952DL, SN74ALVCH162245DGGR omits registration entirely-making it unsuitable for timing-critical staging-while SN74LVC16245ADGGR trades bus-hold and per-channel clock-enable for lower cost and reduced feature depth, limiting its use in hot-plug or multi-clock-domain systems.
Availability
SN74ALVCH16952DL is available at Aetrix Electronics and suitable for memory interface buffering, FPGA-to-ASIC interconnect, and industrial backplane interface applications requiring stable component supply, long-term industrial temperature support, and registered bus isolation.
Supply support for SN74ALVCH16952DL 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74ALVCH16952DL belongs to TI's Widebus™ family of high-speed logic devices, engineered specifically for registered data transfer, bus isolation, and voltage-level translation in complex digital systems.
FAQ
What is the recommended power-up sequence for SN74ALVCH16952DL?
TI specifies that OE inputs must be held high (via pullup to VCC) during power-up to guarantee high-impedance outputs before internal logic stabilizes. For SN74ALVCH16952DL, use a minimum 10-kΩ pullup on each OEAB/OEBA pin; VCC should ramp monotonically from 0 V to final value within 100 ms. No sequencing between VCC and GND is required, but simultaneous ramping is preferred.
Does SN74ALVCH16952DL support hot-swap operation?
Yes - SN74ALVCH16952DL supports hot-swap when OE is pulled high during insertion, ensuring outputs remain in high-impedance state until host firmware asserts control. Its bus-hold circuitry prevents floating inputs during partial connection, and JESD 17 latch-up immunity (>500 mA) protects against transient overstress during live insertion.
Can SN74ALVCH16952DL operate at 1.65 V with full 150-MHz performance?
No - while SN74ALVCH16952DL is rated for 1.65–3.6 V operation, the 150-MHz maximum clock frequency is specified only at VCC ≥ 2.3 V. At 1.65 V, timing parameters degrade: tpd increases to 4.6 ns and fmax drops to 100 MHz per TI characterization data. Full-speed operation requires VCC ≥ 2.5 V.
How does bus-hold function on SN74ALVCH16952DL affect input threshold voltage?
Bus-hold circuitry on SN74ALVCH16952DL maintains input voltage near the existing logic state using weak feedback, but does not alter nominal VIH/VIL thresholds. At VCC = 3.3 V, VIH remains 2.0 V min and VIL stays 0.8 V max; bus-hold current (±75 µA) ensures stable retention without shifting switching points - verified across –40°C to +85°C.
Is SN74ALVCH16952DL pin-compatible with other Widebus™ transceivers like SN74ALVCH162245?
No - SN74ALVCH16952DL has a unique 56-pin DL footprint with dedicated clock-enable and dual-direction control signals not present on SN74ALVCH162245 (a 48-pin device). Pin counts, signal assignments, and power pin distribution differ; PCB redesign is required for substitution. Functional equivalence does not imply mechanical compatibility.
SN74ALVCH16952DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
SN74ALVCH16952DL FAQ
1.How can I place an order for SN74ALVCH16952DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16952DL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74ALVCH16952DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16952DL is usually 5 days.
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Once your SN74ALVCH16952DL 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 SN74ALVCH16952DL?
For technical support, including SN74ALVCH16952DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16952DL requirements.
6.How does Aetrix verify that SN74ALVCH16952DL is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16952DL 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 SN74ALVCH16952DL meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16952DL?
All SN74ALVCH16952DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16952DL, 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 SN74ALVCH16952DL part is unused and in its original packaging.
Return procedure for SN74ALVCH16952DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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