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Texas Instruments SN74LVTH652DWR
- Part No.:
- SN74LVTH652DWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVTH652DWR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,416
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Product details
Overview
SN74LVTH652DWR from Texas Instruments is a 3.3-V octal bus transceiver with dual D-type registers, supporting mixed-mode 5-V/3.3-V interfacing, real-time or stored data transfer, and hot-insertion via Ioff and power-up 3-state. It features bus-hold on all A/B data inputs, operates down to 2.7 V, and delivers 64 mA sink current per output at VCC = 3.3 V. Used in backplane interface and legacy system bridging.
For engineers reviewing the SN74LVTH652DWR datasheet, SN74LVTH652DWR pinout, SN74LVTH652DWR application, or SN74LVTH652DWR equivalent, this page provides verified functional architecture, timing-critical switching parameters (tPLH/tPHL ≤ 5.9 ns), bus-hold behavior, hot-swap enablement, and direct alternative part comparisons for industrial bus management designs.
Technical Context
The SN74LVTH652DWR integrates two independent 8-bit bidirectional transceivers with synchronous storage registers clocked by CLKAB and CLKBA. Each side supports real-time pass-through or registered data output controlled by SAB/SBA select inputs and OEAB/OEBA enables - eliminating multiplexer glitches during mode transitions.
Its TTL-compatible 5-V input tolerance (VI up to 5.5 V) and 3.3-V VCC operation enable seamless interfacing between legacy 5-V logic and modern low-voltage buses. Bus-hold circuitry maintains valid logic states on floating A/B inputs without external resistors, while Ioff limits current backflow during partial power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery supply and stable 3.3-V rail operation |
| Input Voltage Tolerance | Up to 5.5 V - enables direct connection to 5-V TTL buses without level shifters |
| Output Drive Strength | 64 mA sink / 32 mA source at VCC = 3.3 V - drives heavy capacitive loads and multiple TTL inputs |
| Max Clock Frequency | 150 MHz - supports high-speed synchronous bus transfers in real-time or register modes |
| Bus-Hold Current | ±500 µA at VCC = 3.6 V - actively holds unused A/B inputs at valid logic levels, eliminating pullup/pulldown resistors |
| Ioff Leakage | ±100 µA at VCC = 0 V - prevents damaging back-current during hot insertion or partial power-down |
| Propagation Delay | tPLH/tPHL ≤ 5.9 ns (CL = 50 pF) - ensures timing-critical synchronization across 8-bit data paths |
Pinout & Package
SN74LVTH652DWR is packaged in a 24-pin SOIC (DW) with 300-mil body width, 1.27-mm lead pitch, and RoHS-compliant NiPdAu finish. The package meets JEDEC MS-013 and is rated MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4–11, 14–21 | A1–A8, B1–B8 data I/O | Bidirectional 8-bit data ports with bus-hold; no external termination required |
| 3, 13 | OEAB, OEBA | Active-low output enables controlling direction and high-impedance state of A↔B paths |
| 12, 24 | GND, VCC | Power reference and 3.3-V supply - decoupling required within 10 mm of pins |
| 22, 23 | CLKAB, CLKBA | Positive-edge clock inputs latching data into respective A or B registers |
| 21, 22 | SAB, SBA | Select inputs choosing real-time (low) or stored (high) data routing - glitch-free transition |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage interface | 5-V-tolerant inputs with 3.3-V VCC enable direct interconnection between legacy and modern logic families |
| Hot-insertion support | Ioff and power-up 3-state prevent back-current and bus conflicts during live board insertion |
| Integrated bus-hold | Eliminates need for 10-kΩ pullup/pulldown resistors on all 16 data lines - reduces BOM count and layout area |
| Glitch-free mode selection | SAB/SBA control logic avoids transient invalid states when switching between real-time and registered data paths |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V ensures signal integrity during simultaneous output switching |
Applications
| Backplane Data Routing | Legacy-to-Modern System Bridge |
|---|---|
Use Scenario: Isolating and synchronizing data flow between two independent 8-bit parallel buses in a modular chassis with shared backplane. IC Role / Device Role / Timing Role: Bidirectional transceiver with register staging - stores incoming data on one bus while forwarding previously captured data to the other. Use Value: Enables deterministic latency and eliminates metastability risk via synchronous clocking of both A and B sides using separate CLKAB/CLKBA inputs. | Use Scenario: Interfacing a 5-V microcontroller address/data bus to a 3.3-V FPGA-based peripheral subsystem. IC Role / Device Role / Timing Role: Level-translating bus transceiver with storage - buffers 5-V signals for safe 3.3-V domain sampling and allows burst-mode handshaking. Use Value: Eliminates discrete level shifters and external latches while maintaining full 150-MHz throughput and 5.9-ns propagation delay. |
| Hot-Swappable Module Interface | Industrial Control Bus Management |
Use Scenario: Enabling live replacement of I/O modules in a programmable logic controller rack without powering down the main controller. IC Role / Device Role / Timing Role: Hot-insertion-qualified transceiver - Ioff disables outputs during power ramp, preventing bus contention during module insertion. Use Value: Guarantees zero current backflow (< ±100 µA at VCC = 0) and automatic high-Z state above 1.5 V, satisfying IEC 61000-4-2 ESD and MIL-STD-704 power sequencing requirements. | Use Scenario: Managing shared sensor/actuator data lanes across multiple PLC subracks with varying voltage domains and timing constraints. IC Role / Device Role / Timing Role: Dual-register bus manager - stores sensor readings locally before forwarding to master CPU, decoupling acquisition and communication timing. Use Value: Reduces master CPU polling overhead by enabling autonomous data capture at 150 MHz and selective readout via OEAB/OEBA gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver with register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVT652DW | Lacks bus-hold and Ioff; 5-V-only VCC operation; lower drive (32 mA sink) | Requires external pullups and cannot support hot-swap or battery-down scenarios | Choose only if legacy 5-V-only design and cost sensitivity outweigh reliability needs |
| SN74LVCH16652DLR | 16-bit, 3.3-V-only, no 5-V input tolerance; includes power-down mode and higher density | Not suitable for mixed-voltage interfaces; requires redesign for 16-bit lane width and new PCB layout | Select when migrating to fully 3.3-V systems and needing double data width without voltage translation |
Compared with SN74LVT652DW and SN74LVCH16652DLR, the SN74LVTH652DWR uniquely combines 5-V-tolerant inputs, integrated bus-hold, hot-swap safety, and octal registered transceivers in a standard SOIC-24 footprint - making it irreplaceable for mixed-domain industrial backplanes requiring zero-BOM-addition robustness.
Availability
SN74LVTH652DWR is available at Aetrix Electronics and suitable for industrial control backplanes, legacy system upgrades, and hot-swappable I/O modules requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for SN74LVTH652DWR 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 SN74LVTH652DWR belongs to TI's LVT/H series of advanced bus-interface ICs, engineered specifically for robust mixed-voltage system integration, hot-plug reliability, and reduced external component count in mission-critical infrastructure.
FAQ
What voltage levels does the SN74LVTH652DWR support on its inputs and outputs?
The SN74LVTH652DWR accepts 5-V-tolerant inputs (up to 5.5 V) while operating from a 3.3-V supply (VCC = 2.7 V to 3.6 V). Its outputs swing rail-to-rail within the 3.3-V domain - VOH ≥ 2.4 V and VOL ≤ 0.55 V at IOL = 64 mA - enabling direct interfacing with both 5-V TTL and 3.3-V CMOS loads without level-shifting circuitry. This dual-voltage capability is intrinsic to the SN74LVTH652DWR silicon design.
Does the SN74LVTH652DWR require external pullup or pulldown resistors on its data lines?
No, the SN74LVTH652DWR includes active bus-hold circuitry on all 16 A/B data inputs (A1–A8, B1–B8), which maintains valid logic states on floating or unused lines without external components. TI explicitly warns against adding pullup/pulldown resistors when bus-hold is enabled, as they may overload the internal circuitry. This feature is confirmed in the SN74LVTH652DWR datasheet Section 2 and eliminates up to 16 resistors per device.
How does the SN74LVTH652DWR support hot-insertion in live backplane systems?
The SN74LVTH652DWR supports hot-insertion through two integrated features: Ioff circuitry disables outputs when VCC = 0 V (leakage < ±100 µA), preventing back-current into powered sections; and power-up 3-state forces outputs into high-impedance during VCC ramp (0–1.5 V), avoiding bus conflicts. Both mechanisms are process-hardened and tested per JESD78, and are core specifications of the SN74LVTH652DWR - not optional configurations.
What is the maximum clock frequency supported by the SN74LVTH652DWR for register operations?
The SN74LVTH652DWR supports a maximum clock frequency of 150 MHz for both CLKAB and CLKBA inputs under recommended conditions (VCC = 3.3 V ± 0.3 V, TA = 25°C, CL = 50 pF). This value is guaranteed across the full commercial temperature range (−40°C to 85°C) and appears in the "Timing Requirements" table of the official SN74LVTH652DWR datasheet (SCBS706F, Rev. October 2003), confirming deterministic register capture at high-speed bus rates.
Can the SN74LVTH652DWR operate with a supply voltage below 3.3 V?
Yes, the SN74LVTH652DWR is fully specified from VCC = 2.7 V to 3.6 V, enabling reliable operation with unregulated battery supplies or brownout conditions. At 2.7 V, it maintains 48 mA output sink capability, 150 MHz clock rate, and bus-hold functionality - all validated in the "Recommended Operating Conditions" and "Electrical Characteristics" tables of the SN74LVTH652DWR datasheet. This 2.7-V minimum is a hard specification, not a derated recommendation.
SN74LVTH652DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
SN74LVTH652DWR FAQ
1.How can I place an order for SN74LVTH652DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH652DWR 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 SN74LVTH652DWR reliable?
The price and inventory of SN74LVTH652DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH652DWR is usually 5 days.
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SN74LVTH652DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH652DWR 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 SN74LVTH652DWR?
For technical support, including SN74LVTH652DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH652DWR requirements.
6.How does Aetrix verify that SN74LVTH652DWR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH652DWR 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 SN74LVTH652DWR meets industry standards.
7.What is the process for return or replacement of SN74LVTH652DWR?
All SN74LVTH652DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH652DWR, 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 SN74LVTH652DWR part is unused and in its original packaging.
Return procedure for SN74LVTH652DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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