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onsemi 74LVTH652MTC
- Part No.:
- 74LVTH652MTC
- Manufacturer:
- onsemi
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVTH652MTC.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,210
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Product details
Overview
74LVTH652MTC 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 74LVTH652MTC datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.3V supply operation (2.7–3.6V), ±32 mA/64 mA drive capability, bushold input retention, live insertion support, and TSSOP-24 package compatibility with JEDEC MO-153 footprint.
Technical Context
The 74LVTH652MTC implements a dual-bus architecture with independent clocking (CPAB for A→B, CPBA for B→A) and select logic (SAB/SBA) enabling four fundamental modes: real-time B→A, real-time A→B, stored A→B, and simultaneous stored A↔B transfer. Its BiCMOS process delivers ABT-class speed (150 MHz max clock) with low power dissipation.
All eight A and B data lines serve as both inputs and 3-STATE outputs, with bushold circuitry eliminating external pull-ups on unused pins. Power-up/down high-impedance behavior ensures glitch-free bus loading during hot-swap events, and latch-up immunity exceeds 500 mA per IEC 61000-4-2 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Ensures stable operation across industrial-grade 3.3V rail tolerances. |
| IOH/IOL | −32 mA / +64 mA - Supports driving heavy capacitive loads or multiple TTL inputs without external buffers. |
| fMAX | 150 MHz - Enables high-speed synchronous bus interfacing in real-time control applications. |
| tPLH/tPHL | 1.3 ns to 6.4 ns - Guarantees sub-7 ns propagation delay across voltage/temperature range for timing-critical designs. |
| Bushold Current | ±75 µA at VI = 0.8V/2.0V - Maintains valid logic state on floating inputs without external resistors. |
| ESD Rating | HBM > 2000 V - Provides robust handling protection during PCB assembly and field service. |
| Operating Temp | −40°C to +85°C - Qualified for extended temperature use in automotive body electronics and industrial PLCs. |
Pinout & Package
74LVTH652MTC is housed in a 24-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4 mm wide, with 0.65 mm lead pitch and exposed pad not present. Pin numbering follows standard JEDEC TSSOP convention, counterclockwise from notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | Data Register A Inputs / 3-STATE Outputs | Bi-directional I/O port for Bus A; latched or passed-through based on CPAB/SAB/OEAB states. |
| B0–B7 | Data Register B Inputs / 3-STATE Outputs | Bi-directional I/O port for Bus B; latched or passed-through based on CPBA/SBA/OEBA states. |
| CPAB | Clock Pulse Input (A-to-B) | Triggers load of A-bus data into B-register on LOW-to-HIGH transition; active regardless of OEAB/OEBA. |
| CPBA | Clock Pulse Input (B-to-A) | Triggers load of B-bus data into A-register on LOW-to-HIGH transition; active regardless of OEAB/OEBA. |
| SAB | Select Input (A-to-B Path) | Controls whether A→B path passes real-time or registered data when OEAB is active. |
| SBA | Select Input (B-to-A Path) | Controls whether B→A path passes real-time or registered data when OEBA is active. |
| OEAB | Output Enable (A-to-B) | Enables/disables A→B transceiver path; HIGH disables outputs to high-impedance state. |
| OEBA | Output Enable (B-to-A) | Enables/disables B→A transceiver path; HIGH disables outputs to high-impedance state. |
| VCC | Power Supply | 3.3V nominal supply; must be decoupled locally due to fast switching current demands. |
| GND | Ground Reference | Dual ground pins (pins 12 and 24) reduce ground bounce in high-speed bus switching. |
Key Features
| Feature | Design Value |
|---|---|
| Bushold Inputs | Eliminates need for 10-kΩ external pull-up resistors on all 16 data pins, reducing BOM count and board space. |
| Live Insertion Support | Power-up/down high-impedance behavior prevents bus contention during hot-plug operations in modular backplane systems. |
| TTL Interface Compatibility | Accepts 5V-tolerant inputs (VI up to 5.5V) and drives 5V TTL loads, enabling mixed-voltage system interconnect. |
| Dual Independent Clocking | CPAB and CPBA allow asynchronous registration of A and B bus data, supporting independent timing domains. |
| Functional 74 Series Compatibility | Pin- and function-compatible replacement for legacy 74652 in upgrade paths, preserving existing PCB layouts. |
Applications
| Industrial Backplane Interconnect | Modular PLC I/O Expansion |
|---|---|
Use Scenario: Bidirectional data routing between CPU module and hot-swappable I/O cards in a 3U CompactPCI chassis. IC Role / Device Role / Timing Role: Octal transceiver/register managing time-multiplexed address/data bus handshaking with glitch-free isolation during card insertion. Use Value: Bushold inputs prevent floating bus states during partial insertion; 3-STATE control enables clean arbitration between master and slave modules. | Use Scenario: Synchronizing sensor data from analog input modules to a central controller via shared 3.3V backplane. IC Role / Device Role / Timing Role: Registering sampled ADC values on B-bus and forwarding to A-bus under CPBA control, decoupling sampling and processing clocks. Use Value: Dual-clock architecture allows independent timing of acquisition and transmission, improving deterministic latency. |
| Automotive Body Control Gateway | Test Equipment Signal Multiplexing |
Use Scenario: Interfacing 3.3V microcontroller peripherals with legacy 5V CAN/LIN transceivers and discrete driver ICs. IC Role / Device Role / Timing Role: Level-shifting transceiver bridging mixed-voltage domains while providing registered buffering for noise-prone harness connections. Use Value: 5V-tolerant inputs and 64 mA sink capability drive long traces directly; latch-up immunity meets AEC-Q100 stress requirements. | Use Scenario: Routing stimulus signals from multiple AWG channels to DUT pins in automated test fixtures with dynamic reconfiguration. IC Role / Device Role / Timing Role: Configurable register/transceiver enabling pattern-based signal injection or response capture via SAB/SBA-controlled mode selection. Use Value: Real-time and registered modes allow both immediate signal pass-through and synchronized capture windows within single device. |
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 different BiCMOS process; tPLH/tPHL typical 3.2 ns vs. Fairchild's 4.5 ns typ; identical pinout and DC specs. | Preferred in TI-centric designs where design tools and reference layouts are optimized for TI packaging and simulation models. | Select when leveraging TI's WEBENCH or when sourcing from TI-authorized channels with volume pricing advantages. |
| 74ALVCH16652DLR | 16-bit version in 48-pin TSSOP; higher channel count but no bushold; requires external pull-ups; operates at same VCC range. | Suitable for wider bus widths where space permits larger package; lacks bushold, increasing external component count. | Choose only when 16-bit width is required and bushold is not critical; verify layout compatibility with 48-pin footprint. |
Compared with SN74LVT652PWR and 74ALVCH16652DLR, the 74LVTH652MTC offers unique bushold functionality and proven live-insertion reliability in TSSOP-24, making it optimal for space-constrained, hot-swap-capable industrial backplanes where pin count and passive component reduction are critical.
Availability
74LVTH652MTC is available at Aetrix Electronics and suitable for industrial backplane interconnect, modular PLC I/O expansion, automotive body control gateways, and test equipment signal multiplexing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74LVTH652MTC 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 leading designer and manufacturer of high-performance analog and power ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed and supported.
The LVTH logic family was engineered specifically for low-voltage 3.3V systems needing backward compatibility with 5V TTL interfaces, targeting industrial control, telecom infrastructure, and embedded computing applications.
FAQ
What is the maximum clock frequency supported by the 74LVTH652MTC?
The 74LVTH652MTC supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 3.3V ± 0.3V, TA = −40°C to +85°C). This specification is guaranteed across temperature and voltage ranges and applies to both CPAB and CPBA inputs. The 74LVTH652MTC achieves this performance using an advanced BiCMOS process that balances speed and power efficiency, making it suitable for high-throughput bus arbitration in real-time control systems.
Does the 74LVTH652MTC require external pull-up resistors on its data inputs?
No, the 74LVTH652MTC does not require external pull-up resistors on its A0–A7 or B0–B7 inputs due to integrated bushold circuitry. This feature actively maintains the last-valid logic state on floating inputs, with minimum drive requirements of ±75 µA at VI = 0.8V/2.0V. The bushold function is inherent to the 74LVTH652MTC silicon design and eliminates BOM cost and board area associated with discrete pull-ups.
Can the 74LVTH652MTC interface directly with 5V logic systems?
Yes, the 74LVTH652MTC supports direct interfacing with 5V logic systems: its inputs tolerate up to 5.5V (VI), and its outputs can drive standard TTL loads with 64 mA sink capability. While powered from a 3.3V supply (VCC = 2.7–3.6V), the 74LVTH652MTC maintains full 5V-tolerant input operation and provides compatible output voltage levels, enabling seamless integration into mixed-voltage architectures without level shifters.
What package type is used for the 74LVTH652MTC?
The 74LVTH652MTC is packaged in a 24-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4 mm wide, with 0.65 mm lead pitch. This package is distinct from the SOIC variant (74LVTH652WM, M24B) and offers higher pin density and improved thermal performance for compact industrial PCB layouts. The 74LVTH652MTC's MTC24 package designation confirms its TSSOP construction and footprint compatibility.
How does the 74LVTH652MTC handle power-up and power-down sequencing?
The 74LVTH652MTC features power-up/down high-impedance behavior: during VCC ramp-up or ramp-down, all outputs enter a high-impedance state before internal logic stabilizes, preventing bus contention and glitches. This behavior is intrinsic to the 74LVTH652MTC's BiCMOS design and is verified across temperature ranges. It enables safe live insertion/extraction in modular systems without requiring external reset or enable sequencing circuits.
74LVTH652MTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVTH
- Package/Case:
- 24-TSSOP (0.173", 4.40mm 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-TSSOP
74LVTH652MTC FAQ
1.How can I place an order for 74LVTH652MTC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH652MTC 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 74LVTH652MTC reliable?
The price and inventory of 74LVTH652MTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH652MTC is usually 5 days.
3.What payment methods are accepted for 74LVTH652MTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH652MTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH652MTC?
74LVTH652MTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH652MTC 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 74LVTH652MTC?
For technical support, including 74LVTH652MTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH652MTC requirements.
6.How does Aetrix verify that 74LVTH652MTC is sourced from the original manufacturer or authorized distributors?
All 74LVTH652MTC 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 74LVTH652MTC meets industry standards.
7.What is the process for return or replacement of 74LVTH652MTC?
All 74LVTH652MTC units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH652MTC, 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 74LVTH652MTC part is unused and in its original packaging.
Return procedure for 74LVTH652MTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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