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Texas Instruments SN74LVCH16952ADLR
- Part No.:
- SN74LVCH16952ADLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCH16952ADLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56SSOP
- Quantity:
- Payment:
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Inventory:2,868
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Product details
Overview
SN74LVCH16952ADLR from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between A and B buses in mixed-voltage systems. It operates from 1.65 V to 3.6 V, accepts 5.5-V inputs, delivers ≤6.6 ns propagation delay at 3.3 V, and supports partial-power-down via Ioff. It is used in high-density memory interface and bus isolation applications requiring registered data staging.
For engineers reviewing the SN74LVCH16952ADLR datasheet, SN74LVCH16952ADLR pinout, SN74LVCH16952ADLR application, or SN74LVCH16952ADLR equivalent, key selection criteria include its dual 8-bit register configuration, bus-hold inputs eliminating external resistors, mixed-mode 3.3-V/5-V signal translation capability, and SSOP-56 package compatibility with industrial temperature range (–40°C to 85°C).
Technical Context
The SN74LVCH16952ADLR implements two independent sets of D-type flip-flops-one for A-to-B and one for B-to-A data flow-each controlled by dedicated clock (CLKAB/CLKBA), clock-enable (CEAB/CEBA), and output-enable (OEAB/OEBA) signals. Its dual-register architecture enables synchronous latching on both data paths without internal arbitration logic.
It features active bus-hold circuitry on all A and B port inputs, ensuring stable logic levels on floating lines without external pullups; Ioff protection disables outputs during power-down to prevent backflow current; and input tolerance up to 5.5 V allows direct interfacing with legacy 5-V logic while powered from 3.3-V or lower rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage logic families including 1.8-V, 2.5-V, and 3.3-V systems. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe connection to 5-V drivers without level-shifting circuitry. |
| Max tpd | 6.6 ns at 3.3 V - Supports high-speed synchronous bus transfer up to 150 MHz clock frequency. |
| Ioff Current | ±10 µA at VI/VO = 5.5 V - Prevents damaging current flow during partial power-down states. |
| Bus-Hold Input Current | ±75 µA at 3 V - Maintains valid logic state on unused inputs without external biasing components. |
| Output Drive | ±24 mA at 3 V - Sufficient to drive multiple LVTTL loads or short PCB traces without buffering. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets industrial-grade robustness requirements per JESD22. |
Pinout & Package
SN74LVCH16952ADLR uses a 56-pin SSOP (DL) package with 0.5-mm lead pitch, 11.4 mm × 4.4 mm body size, and 1.2 mm max height. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and suitable for standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Controls 3-state output drivers for respective 8-bit segments; low enables A↔B data transfer. |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Register Clock (rising-edge triggered) | Samples data from A or B bus into D-flip-flops on low-to-high transition when CE is asserted. |
| 1CEAB, 2CEAB, 1CEBA, 2CEBA | Clock Enable (active-low) | Gates clock sampling - must be low for CLK edge to capture data; high holds register value. |
| 1A1–1A8, 2A1–2A8 | A-side data inputs/outputs | First and second 8-bit group of bidirectional I/O ports connected to A bus. |
| 1B1–1B8, 2B1–2B8 | B-side data inputs/outputs | First and second 8-bit group of bidirectional I/O ports connected to B bus. |
| VCC, GND | Power supply and ground | Dual VCC/GND pairs per side ensure low-noise operation and reduce simultaneous switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | Accepts 5-V inputs while operating at 1.65–3.6-V VCC - eliminates need for discrete level shifters in 3.3/5-V hybrid systems. |
| Integrated bus-hold circuitry | Active on all A/B port inputs - prevents floating nodes and system glitches without external pullup/pulldown resistors. |
| Partial-power-down support (Ioff) | Outputs disable automatically when VCC = 0 V - blocks reverse current flow in hot-swap or standby modes. |
| Dual 8-bit register architecture | Two independent 8-bit register banks allow flexible partitioning as two separate transceivers or one 16-bit unit. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes noise coupling into shared ground planes during high-speed switching - critical for signal integrity in dense layouts. |
Applications
| Memory Interface Buffering | Industrial Backplane Isolation |
|---|---|
|
Use Scenario: Buffering address/data lines between a 3.3-V FPGA controller and legacy 5-V SRAM modules in programmable logic systems. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free data staging with clocked enable control and 5-V-tolerant inputs. Use Value: Eliminates timing skew between controller and memory by registering both read and write paths, while supporting mixed-voltage signaling without external level shifters. |
Use Scenario: Isolating control and status buses across redundant power domains in industrial PLC backplanes. IC Role / Device Role / Timing Role: Bidirectional registered buffer enabling deterministic data handoff between independently powered subsystems. Use Value: Ioff protection prevents backfeed during domain power cycling; bus-hold maintains valid logic states during transient power loss. |
| High-Density Bus Expansion | Test Equipment Signal Conditioning |
|
Use Scenario: Expanding parallel data bus width in automated test equipment where space-constrained PCBs require minimal component count. IC Role / Device Role / Timing Role: Dual 8-bit transceiver acting as a compact, register-synchronized bus repeater with 3-state output control. Use Value: Reduces layout complexity versus discrete latch + buffer solutions; 6.6-ns tpd ensures timing closure in 100+ MHz test pattern generation. |
Use Scenario: Conditioning digital stimulus/response signals between 5-V DUT interfaces and 3.3-V measurement ASICs in ATE platforms. IC Role / Device Role / Timing Role: Voltage-tolerant registered transceiver providing clean, synchronized signal translation with noise-immune bus-hold inputs. Use Value: VOLP < 0.8 V and VOHV > 2 V suppress ground bounce-induced false triggering during high-speed test vector execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | No internal registers; unregistered 16-bit transceiver with identical VCC range and 5.5-V tolerant inputs. | Suitable only where asynchronous bus bridging is acceptable; lacks clocked data staging. | Select when deterministic setup/hold timing is not required and lower propagation delay (≤5.2 ns) is prioritized over registration. |
| SN74AVC16T245DGGR | Auto-direction sensing, no clock or register controls; supports 1.2–3.6-V VCC and 3.6-V max I/O tolerance. | Used in direction-transparent applications like PCIe sideband or USB PHY interfaces; not suitable for clocked staging. | Choose for dynamic bidirectional control without external clocking logic; avoid when synchronous latching or hold-time compliance is mandatory. |
Compared with SN74LVCH16952ADLR, SN74LVC16245ADGGR offers faster unregistered transfer but no clocked data retention, while SN74AVC16T245DGGR provides automatic direction detection at the cost of losing precise timing control - making SN74LVCH16952ADLR uniquely suited for applications demanding registered, synchronous, mixed-voltage bus interfacing.
Availability
SN74LVCH16952ADLR is available at Aetrix Electronics and suitable for memory interface buffering, industrial backplane isolation, high-density bus expansion, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCH16952ADLR 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 ICs, with decades of experience in high-reliability industrial and automotive-grade components.
The SN74LVCH16952ADLR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, mixed-voltage board-level interconnect in space-constrained industrial and communications infrastructure applications.
FAQ
What is the maximum clock frequency supported by the SN74LVCH16952ADLR?
The SN74LVCH16952ADLR supports a maximum clock frequency of 150 MHz at VCC = 3.3 V, as specified in the timing requirements table. At lower supply voltages (e.g., 1.8 V), the maximum frequency reduces to 130 MHz due to increased propagation delay. This rating assumes proper signal integrity, load capacitance ≤50 pF, and adherence to setup/hold time margins defined in the datasheet.
Does the SN74LVCH16952ADLR require external pull-up resistors on its control inputs?
No, the SN74LVCH16952ADLR does not require external pull-up resistors on control inputs such as OEAB, CEAB, or CLKAB because it includes internal bus-hold circuitry on all A and B port inputs - and control inputs are CMOS-compatible with rail-to-rail thresholds. However, TI recommends tying OE to VCC via a pull-up resistor during power-up to guarantee high-impedance outputs before initialization.
Can the SN74LVCH16952ADLR be used as a level shifter between 5-V and 3.3-V logic domains?
Yes, the SN74LVCH16952ADLR can serve as a bidirectional level shifter: its inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), and its outputs swing rail-to-rail within the VCC range. When VCC = 3.3 V, it safely accepts 5-V inputs and drives 3.3-V–compatible outputs - enabling direct interface between 5-V peripherals and 3.3-V controllers without additional translation circuitry.
What is the purpose of the Ioff feature in the SN74LVCH16952ADLR?
The Ioff feature in the SN74LVCH16952ADLR disables all outputs when VCC = 0 V, preventing current backflow from live I/O lines into the unpowered device. This protects downstream circuitry during hot-swap, partial power-down, or system sleep modes - a critical requirement in modular industrial systems where subsystems may be powered independently.
Is the SN74LVCH16952ADLR pin-compatible with other members of the LVCH16xxx family?
Yes, the SN74LVCH16952ADLR shares the same 56-pin SSOP (DL) footprint and pinout with functionally related devices including SN74LVCH162373ADLR and SN74LVCH16374ADLR, enabling drop-in replacement in designs using registered latches or flip-flops. However, register control logic (e.g., clock polarity, enable behavior) differs - firmware and timing constraints must be verified before substitution.
SN74LVCH16952ADLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm 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-SSOP
SN74LVCH16952ADLR FAQ
1.How can I place an order for SN74LVCH16952ADLR through Aetrix?
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The price and inventory of SN74LVCH16952ADLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16952ADLR is usually 5 days.
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Once your SN74LVCH16952ADLR 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 SN74LVCH16952ADLR?
For technical support, including SN74LVCH16952ADLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16952ADLR requirements.
6.How does Aetrix verify that SN74LVCH16952ADLR is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16952ADLR 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 SN74LVCH16952ADLR meets industry standards.
7.What is the process for return or replacement of SN74LVCH16952ADLR?
All SN74LVCH16952ADLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16952ADLR, 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 SN74LVCH16952ADLR part is unused and in its original packaging.
Return procedure for SN74LVCH16952ADLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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