My Inquiry
My Account
onsemi 74LVTH652WM
- Part No.:
- 74LVTH652WM
- Manufacturer:
- onsemi
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVTH652WM.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,723
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVTH652WM from Fairchild Semiconductor is a low-voltage octal transceiver/register with 3-STATE outputs, designed for bidirectional data flow between A and B buses in 3.3V systems while maintaining TTL-level compatibility with 5V environments. It integrates D-type flip-flops, bushold inputs, dual clock inputs (CPAB/CPBA), and independent output enables (OEAB/OEBA), supporting real-time transfer, register storage, and multiplexed bus management in industrial control backplanes.
For engineers reviewing the 74LVTH652WM datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.3V supply operation with 5V-tolerant I/O, ±32 mA/64 mA drive capability, bushold input retention, live insertion support, and SOIC-24 package footprint compatibility with legacy 74-series logic designs.
Technical Context
The 74LVTH652WM implements dual-directional bus transceivers with synchronous register functionality: data on either A or B bus is latched on LOW-to-HIGH transitions of CPAB or CPBA, respectively. Select inputs (SAB/SBA) determine whether real-time or registered data propagates to the opposite bus.
Its BiCMOS fabrication enables 150 MHz maximum clock frequency at 3.3V, with propagation delays as low as 1.3 ns (data-to-output), output skew ≤1.0 ns, and power-up/down high-impedance behavior that prevents bus glitches during hot-swap events - critical for modular backplane architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 2.7 V to 3.6 V - ensures stable operation across industrial-grade voltage tolerances in 3.3V systems |
| IOH/IOL Drive | −32 mA / +64 mA - supports driving heavy capacitive loads and multiple TTL inputs without external buffers |
| Max Clock Frequency | 150 MHz - enables high-speed synchronous data transfer in backplane and memory interface applications |
| Propagation Delay | 1.3 ns min (data-to-output) - guarantees tight timing margins in fast-bus systems like PCI-X or custom parallel interconnects |
| Bushold Input Current | ±75 µA at VI = 0.8V/2.0V - eliminates need for external pull-ups on unused data lines, reducing BOM count and board space |
| Operating Temperature | −40°C to +85°C - qualified for extended temperature industrial and telecom infrastructure deployments |
| ESD Rating | HBM > 2000 V - provides robust handling tolerance during assembly and field service operations |
Pinout & Package
74LVTH652WM is housed in a 24-lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013 compliant, 0.300-inch wide package (Package Number M24B), with standard lead pitch of 1.27 mm and body dimensions 15.4 mm × 7.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | Data Register A Inputs / 3-STATE Outputs | Bidirectional port for bus A: latches input data on CPAB rising edge or drives registered/real-time data when OEAB active |
| B0–B7 | Data Register B Inputs / 3-STATE Outputs | Bidirectional port for bus B: latches input data on CPBA rising edge or drives registered/real-time data when OEBA active |
| CPAB, CPBA | Asynchronous Clock Inputs | Independent rising-edge-triggered clocks controlling latch timing for A→B and B→A register paths |
| SAB, SBA | Multiplexer Select Inputs | Configure data path mode: real-time transfer, stored-A-to-B, stored-B-to-A, or simultaneous register update |
| OEAB, OEBA | Output Enable Controls | Enable/disable 3-STATE outputs independently per direction - allows isolated bus arbitration and hot-swap isolation |
| VCC, GND | Power Supply Pins | Single 3.3V supply with dedicated power/ground pairs per side to minimize switching noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| 5V-Tolerant I/O | Supports direct interfacing with 5V TTL logic without level shifters - simplifies mixed-voltage system integration |
| Bushold Inputs | Retains logic state on floating A/B data pins without external resistors - reduces component count and layout complexity |
| Live Insertion Support | Power-up/down high-impedance behavior prevents bus contention during hot-plug events - essential for modular chassis systems |
| Dual Register Architecture | Independent A and B registers enable simultaneous capture and forwarding - enables ping-pong buffering and deterministic latency control |
| Functional 74-Series Compatibility | Pin- and function-compatible replacement for 74652 in 3.3V designs - enables drop-in upgrade with no PCB redesign |
Applications
| Industrial Backplane Interface | Modular PLC I/O Expansion |
|---|---|
Use Scenario: Bidirectional data routing between CPU module and I/O carrier boards in a 19-inch rack-mounted controller chassis. IC Role / Device Role / Timing Role: Bus transceiver/register managing time-critical status updates and command distribution across isolated voltage domains. Use Value: Enables deterministic 150 MHz clocked transfers with bushold protection against signal float during module insertion/removal. | Use Scenario: Extending digital input/output capacity across multiple plug-in modules in programmable logic controllers. IC Role / Device Role / Timing Role: Synchronizing sensor actuator data between local microcontroller and centralized scan engine using registered handshaking. Use Value: Dual-register architecture allows overlapping acquisition and transmission cycles, improving overall scan throughput by up to 40%. |
| Legacy System Voltage Translation | High-Density Memory Interposer |
Use Scenario: Interfacing modern 3.3V FPGAs with legacy 5V peripheral ASICs in test equipment and instrumentation platforms. IC Role / Device Role / Timing Role: Level-translating transceiver providing bidirectional data flow while preserving setup/hold timing integrity. Use Value: 5V-tolerant inputs and 3.3V-compatible outputs eliminate need for discrete level-shifter ICs, reducing layer count and signal path skew. | Use Scenario: Buffering address/data/control signals between DDR2 memory banks and SoC in compact embedded computing modules. IC Role / Device Role / Timing Role: Registered repeater minimizing capacitive loading and skew across long parallel traces on dense PCBs. Use Value: Sub-2 ns propagation delay and <1 ns output skew maintain timing closure for 200+ MHz memory interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver/register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVT652PWR | TI part uses LVT logic family; identical 24-pin TSSOP package but different thermal resistance and slightly higher ICCZ (0.35 mA vs. 0.19 mA) | Optimized for lower static power in battery-backed systems; lacks bushold inputs - requires external pull-ups on unused pins | Select when TSSOP footprint is preferred and bushold is not required; verify thermal derating in high-density layouts |
| 74ALVCH16652DLR | 16-bit variant in 48-pin SSOP; double the channel count and wider voltage range (1.65–3.6V); no 5V-tolerant inputs | Targeted at high-channel-count memory subsystems; incompatible pinout and package - requires full PCB redesign | Choose only when scaling beyond 8-bit width is needed; not a drop-in replacement for 74LVTH652WM |
Compared with SN74LVT652PWR and 74ALVCH16652DLR, the 74LVTH652WM uniquely combines bushold input retention, 5V I/O tolerance, and SOIC-24 footprint - making it the only option enabling legacy 74-series upgrades without layout changes or added passives.
Availability
74LVTH652WM is available at Aetrix Electronics and suitable for industrial backplane interfaces, modular PLC I/O expansion, legacy system voltage translation, and high-density memory interposer applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74LVTH652WM 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, power management, and logic devices before its acquisition by ON Semiconductor in 2016.
The 74LVTH652WM belongs to Fairchild's LVTH (Low-Voltage TTL-High-Speed) logic family, engineered specifically for seamless migration from 5V TTL systems to 3.3V infrastructure while preserving timing performance and interoperability.
FAQ
What is the recommended operating voltage range for the 74LVTH652WM?
The 74LVTH652WM is specified to operate over a VCC supply range of 2.7 V to 3.6 V. This range ensures reliable functionality across industrial temperature extremes and accommodates typical 3.3V rail tolerances. Operation outside this window may compromise timing margins, output drive strength, or bushold behavior - always verify voltage stability under load using the device's ICCZ and ICCCL current specifications from the datasheet.
Does the 74LVTH652WM support hot-swap or live insertion?
Yes, the 74LVTH652WM supports live insertion/extraction due to its power-up/down high-impedance feature. During power transitions, all outputs enter a high-impedance state before supply stabilization, preventing bus contention or glitch injection into live systems. This behavior is inherent to the BiCMOS design and does not require external circuitry - confirmed in the Functional Description section of the Fairchild DS012018 datasheet.
How does the bushold function work on the 74LVTH652WM data inputs?
The bushold circuitry on the 74LVTH652WM A0–A7 and B0–B7 inputs actively retains the last valid logic state when an input floats, eliminating external pull-up resistors. It sources or sinks ±75 µA at defined voltage thresholds (VI = 0.8V/2.0V), ensuring stable HIGH or LOW retention. This feature is enabled by default and requires no configuration - verified in the DC Electrical Characteristics table under II(HOLD).
Is the 74LVTH652WM pin-compatible with standard 74-series 652 devices?
Yes, the 74LVTH652WM is functionally and pin-compatible with the original 74652, sharing identical pin assignments, logic behavior, and SOIC-24 footprint. However, it operates at 3.3V with 5V-tolerant I/O, whereas the legacy 74652 requires 5V supply. This enables direct replacement in existing designs where voltage rails have been updated - confirmed in the Features section of DS012018.
What are the maximum output drive capabilities of the 74LVTH652WM?
The 74LVTH652WM delivers −32 mA (sourcing) and +64 mA (sinking) per output, as specified under IOH and IOL in the Recommended Operating Conditions table. These values ensure robust drive into TTL loads and moderate capacitive buses. Performance is guaranteed across −40°C to +85°C and 2.7–3.6V VCC - critical for driving multiple downstream gates or longer traces without signal degradation.
74LVTH652WM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVTH
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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-SOP
74LVTH652WM FAQ
1.How can I place an order for 74LVTH652WM through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH652WM 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 74LVTH652WM reliable?
The price and inventory of 74LVTH652WM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH652WM is usually 5 days.
3.What payment methods are accepted for 74LVTH652WM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH652WM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH652WM?
74LVTH652WM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH652WM 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 74LVTH652WM?
For technical support, including 74LVTH652WM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH652WM requirements.
6.How does Aetrix verify that 74LVTH652WM is sourced from the original manufacturer or authorized distributors?
All 74LVTH652WM 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 74LVTH652WM meets industry standards.
7.What is the process for return or replacement of 74LVTH652WM?
All 74LVTH652WM units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH652WM, 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 74LVTH652WM part is unused and in its original packaging.
Return procedure for 74LVTH652WM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVTH652WM Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
