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Texas Instruments SN74LVCH16245ADLR
- Part No.:
- SN74LVCH16245ADLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCH16245ADLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:853
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Product details
Overview
SN74LVCH16245ADLR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65-V to 3.6-V buses. It supports mixed-mode signaling (5.5-V-tolerant inputs at 3.3-V VCC), delivers 4 ns max propagation delay at 3.3 V, and features Ioff for live insertion and partial-power-down protection. It is used in tablet memory expansion interfaces requiring level translation and bus isolation.
For engineers reviewing the SN74LVCH16245ADLR datasheet, SN74LVCH16245ADLR pinout, SN74LVCH16245ADLR application, or SN74LVCH16245ADLR equivalent, this page provides verified electrical specifications, SSOP-48 package mapping, functional mode table, bus-hold behavior, and validated alternative parts for industrial embedded bus interface design.
Technical Context
The SN74LVCH16245ADLR implements two independent 8-bit bidirectional transceiver sections (A↔B), each controlled by dedicated DIR and OE pins. Direction control is synchronous with data flow: DIR = L enables B→A transmission; DIR = H enables A→B transmission; OE = H forces both ports into high-impedance state regardless of DIR.
Its input circuitry includes active bus-hold on all A- and B-port data lines, eliminating external pull resistors, and supports overvoltage tolerance up to 5.5 V on all I/Os while operating at VCC = 1.65–3.6 V. The Ioff feature ensures <10 µA off-state leakage when VCC = 0 V, preventing back-drive during hot-swap or power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables direct integration into 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe interfacing with 5-V legacy peripherals in mixed-voltage systems. |
| Max Propagation Delay | 4 ns at VCC = 3.3 V - Supports >100 MHz bus operation with tight timing margins. |
| Output Drive Strength | ±24 mA at VCC = 3 V - Sufficient to drive 50-Ω transmission lines or multiple CMOS loads without buffering. |
| Ioff Leakage | <10 µA at VCC = 0 V - Enables safe live insertion and prevents current backflow during partial power-down. |
| Bus-Hold Current | ±45 µA at VCC = 3 V - Actively maintains valid logic state on undriven data lines, eliminating floating inputs. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements per JESD22-A114. |
Pinout & Package
SN74LVCH16245ADLR uses a 48-pin SSOP (DL) package measuring 15.88 mm × 7.49 mm, with 0.635-mm lead pitch and RoHS-compliant NiPdAu finish. Thermal resistance RθJA = 70.6°C/W enables operation up to 125°C ambient under typical PCB layout conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Active-high logic selects data flow direction per section: DIR = H → A→B; DIR = L → B→A. |
| 1OE, 2OE | Output Enable Input | Active-low control: OE = L enables transceiver; OE = H places both A and B ports in high-Z state. |
| 1A1–1A8, 2A1–2A8 | A-Port Data I/O | Bidirectional data lines for first/second 8-bit bus segment; include bus-hold circuitry. |
| 1B1–1B8, 2B1–2B8 | B-Port Data I/O | Bidirectional data lines for complementary bus segment; 5.5-V tolerant, no external pull required. |
| VCC (Pins 7, 18, 31, 42) | Power Supply | Four distributed VCC pins reduce supply noise and improve decoupling effectiveness across the die. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground Reference | Eight GND pins provide low-inductance return paths and minimize ground bounce (VOLP < 0.8 V). |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5.5-V-tolerant I/Os enable interoperability between 3.3-V logic and 5-V peripherals without external translators. |
| Active bus-hold circuitry | Eliminates need for external pullup/pulldown resistors on all 32 data lines, reducing BOM count and board space. |
| Ioff partial-power-down support | Prevents damaging current backflow when VCC is unpowered, enabling hot-plug capability in modular systems. |
| Low ground bounce (VOLP) | <0.8 V at VCC = 3.3 V ensures signal integrity in high-speed switching applications with light capacitive loads. |
| High noise immunity | VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC min), maintaining noise margin across full voltage range. |
Applications
| Tablet Memory Expansion Interface | Industrial PLC Backplane Bus |
|---|---|
|
Use Scenario: Bidirectional data transfer between ARM-based SoC and LPDDR2 memory subsystem in compact tablet designs. IC Role / Device Role / Timing Role: Level-translating bus transceiver isolating 1.8-V memory bus from 3.3-V system controller, with DIR-controlled direction and OE-gated isolation. Use Value: Eliminates discrete level shifters and pull resistors, reducing component count by ≥6 parts per interface while supporting 200-MHz burst transfers. |
Use Scenario: Isolating CPU module from I/O expansion slots in modular programmable logic controllers with hot-swap capability. IC Role / Device Role / Timing Role: Hot-plug-safe bidirectional bus buffer enabling live insertion of I/O cards without disrupting main controller operation. Use Value: Ioff and bus-hold ensure zero back-drive current and stable idle states during card insertion/removal, meeting IEC 61000-4-2 compliance. |
| Wearable Health Sensor Hub | Test Equipment Digital I/O Module |
|
Use Scenario: Interfacing ultra-low-power MCU (1.8-V) with legacy 3.3-V sensor fusion ASIC in fitness tracker mainboard. IC Role / Device Role / Timing Role: Voltage-level translating transceiver managing asynchronous sensor data bursts with minimal power overhead. Use Value: 1.65-V minimum VCC allows operation directly from buck-boost regulator output, reducing standby current to <20 µA per port. |
Use Scenario: Configurable digital pattern generator channel in automated test equipment requiring programmable bus direction and isolation. IC Role / Device Role / Timing Role: Dual-section transceiver enabling dynamic reconfiguration of DUT interface as input capture or stimulus source. Use Value: Independent DIR/OE per 8-bit section allows simultaneous read/write operations on separate sub-buses, doubling test throughput. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADLR | Lacks bus-hold and Ioff; 5-V-tolerant inputs only up to VCC + 0.5 V (not 5.5 V); max tpd = 5.2 ns at 3.3 V. | Suitable for cost-sensitive, non-hot-swap applications where external pull resistors are acceptable and 5-V tolerance is not required. | Select when BOM cost reduction outweighs need for bus-hold and live-insertion robustness. |
| 74ALVC16245PW | Higher VCC range (1.65–3.6 V same), but no Ioff; bus-hold present; 5-V-tolerant inputs; max tpd = 3.7 ns at 3.3 V. | Better speed for high-frequency test equipment, but lacks partial-power-down protection required for modular systems. | Select when propagation delay is critical and hot-swap is not required; verify thermal derating for SSOP-48 layout. |
Compared with SN74LVC16245ADLR and 74ALVC16245PW, the SN74LVCH16245ADLR uniquely combines Ioff, 5.5-V input tolerance, and bus-hold in a single SSOP-48 device-enabling simplified, robust, and field-upgradeable bus interfaces without design compromises.
Availability
SN74LVCH16245ADLR is available at Aetrix Electronics and suitable for tablet memory expansion interfaces, industrial PLC backplanes, wearable sensor hubs, and automated test equipment requiring stable component supply and long-term lifecycle support.
Supply support for SN74LVCH16245ADLR 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 solutions, with over 90 years of innovation in industrial, automotive, and consumer electronics.
The SN74LVCH16245ADLR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically for high-speed, low-voltage, mixed-signal bus interface applications in space-constrained and thermally demanding environments.
FAQ
What is the maximum input voltage rating for SN74LVCH16245ADLR?
The SN74LVCH16245ADLR supports input voltages up to 5.5 V on all A- and B-port pins, regardless of VCC setting (1.65–3.6 V). This overvoltage tolerance enables reliable interfacing with 5-V peripherals in mixed-voltage systems without external clamping or level-shifting circuitry, as confirmed in Section 7.1 Absolute Maximum Ratings and Section 9.3 Feature Description of the SCES495C datasheet.
Does SN74LVCH16245ADLR support hot-plug or live insertion?
Yes, the SN74LVCH16245ADLR supports live insertion via its Ioff feature, which limits off-state leakage current to <10 µA when VCC = 0 V. This prevents damaging back-current flow from powered buses into unpowered sections, making it suitable for modular systems like PLC backplanes and test equipment where cards are inserted or removed during operation, as specified in Section 9.3 and Table 3 of the SCES495C datasheet.
How does bus-hold functionality work on SN74LVCH16245ADLR?
The SN74LVCH16245ADLR integrates active bus-hold circuitry on all 32 A- and B-port data lines, maintaining undriven inputs at valid logic levels (±45 µA hold current at VCC = 3 V). This eliminates the need for external pullup or pulldown resistors, reduces BOM count, and prevents floating inputs that could cause excess ICC or erratic behavior, as detailed in Section 3 Description and Section 9.1 Overview of the SCES495C datasheet.
What is the propagation delay performance of SN74LVCH16245ADLR at 1.8 V?
At VCC = 1.8 V, the SN74LVCH16245ADLR achieves a maximum propagation delay (tpd) of 7.1 ns, as specified in Section 7.6 Switching Characteristics of the SCES495C datasheet. This enables reliable operation in low-voltage, battery-powered applications such as wearables while maintaining timing margins for 100+ MHz data bursts.
Which package variant does SN74LVCH16245ADLR use?
SN74LVCH16245ADLR uses the SSOP-48 (DL) package, measuring 15.88 mm × 7.49 mm with 0.635-mm lead pitch. It is RoHS-compliant, rated for –40°C to +125°C operation, and supplied in 1000-unit large tape-and-reel format, as documented in the Package Option Addendum of the SCES495C datasheet.
SN74LVCH16245ADLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 48-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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVCH16245ADLR FAQ
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6.How does Aetrix verify that SN74LVCH16245ADLR is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16245ADLR 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 SN74LVCH16245ADLR meets industry standards.
7.What is the process for return or replacement of SN74LVCH16245ADLR?
All SN74LVCH16245ADLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16245ADLR, 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 SN74LVCH16245ADLR part is unused and in its original packaging.
Return procedure for SN74LVCH16245ADLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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