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Texas Instruments SN74LVC16T245DL
- Part No.:
- SN74LVC16T245DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC16T245DL.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,413
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Product details
Overview
SN74LVC16T245 from Texas Instruments is a 16-bit dual-supply noninverting bus transceiver enabling bidirectional voltage-level translation between 1.65 V–5.5 V domains. It features two independent directional control inputs (1DIR/2DIR), two output-enable inputs (1OE/2OE), and separate A-port (VCCA-referenced) and B-port (VCCB-referenced) I/O banks. Used in mixed-voltage system interconnects such as 1.8-V microcontroller to 3.3-V peripheral interfaces.
For engineers reviewing the SN74LVC16T245 datasheet, SN74LVC16T245 pinout, SN74LVC16T245 application, or SN74LVC16T245 equivalent, key selection considerations include configurable dual-rail operation, VCC isolation behavior, Ioff partial-power-down support, and guaranteed tri-state timing across 1.65–5.5 V supply ranges.
Technical Context
The SN74LVC16T245 implements two independent 8-bit transceiver channels (1A↔1B and 2A↔2B), each with dedicated DIR and OE controls. Directional data flow is determined by DIR logic level relative to VCCA, while OE (also VCCA-referenced) enables/disables outputs globally per channel. Input circuits remain active regardless of OE state.
VCCA and VCCB power rails operate independently across 1.65 V–5.5 V, enabling translation between 1.8-V, 2.5-V, 3.3-V, and 5-V nodes. The VCC isolation feature forces both ports into high-impedance when either VCCA or VCCB = GND, and Ioff limits backflow current during partial power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 1.65 V to 5.5 V each - supports interoperability across 1.8-V, 2.5-V, 3.3-V, and 5-V logic domains |
| Propagation Delay (tPLH/tPHL) | 0.3 ns to 23.8 ns - varies with VCCA/VCCB combination; e.g., 0.7 ns (B→A) at VCCA=5 V/VCCB=1.8 V |
| Output Drive (IOL/IOH) | ±32 mA - sufficient for driving 50-Ω transmission lines or fan-out to multiple CMOS loads |
| Ioff Current | ±2 μA max - prevents damaging backflow when one rail is powered down while the other remains active |
| VCC Isolation Threshold | Both ports enter Hi-Z if either VCCA or VCCB = GND - eliminates false logic coupling during power sequencing |
| ESD Rating (HBM) | ±2000 V - meets JEDEC JS-001 for robust handling in manufacturing and field environments |
Pinout & Package
SN74LVC16T245 is packaged in SSOP-48 (15.88 mm × 7.49 mm), with all pins assigned to dual 8-bit I/O banks, control inputs, and dual supply/GND terminals. Pin functions are validated per TI SCES636B Rev B (April 2015).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A8, 2A1–2A8 | A-port I/O (VCCA-referenced) | Input/output signals tied to VCCA domain; accept 1.65–5.5 V logic levels |
| 1B1–1B8, 2B1–2B8 | B-port I/O (VCCB-referenced) | Input/output signals tied to VCCB domain; accept 1.65–5.5 V logic levels |
| 1DIR, 2DIR | Direction-control input | High = A→B data flow; Low = B→A data flow; referenced to VCCA |
| 1OE, 2OE | Output-enable input | High = Hi-Z on associated port; Low = enabled output; referenced to VCCA |
| VCCA | A-port supply | Power rail for A-side logic and control inputs (1DIR/2DIR/1OE/2OE) |
| VCCB | B-port supply | Power rail for B-side logic only; no control signal dependency |
| GND | Ground reference | Common return path for both domains; multiple pins ensure low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail level translation | Independent VCCA/VCCB supplies (1.65–5.5 V) enable seamless 1.8↔2.5↔3.3↔5 V bidirectional translation without external biasing |
| VCC isolation | Automatic Hi-Z on both ports if either VCCA or VCCB drops to GND - prevents bus contention during asymmetric power-up/down |
| Ioff partial-power-down | Sub-2 μA off-state current blocks reverse current flow when one supply is inactive - critical for hot-swap and battery-backed systems |
| Overvoltage-tolerant I/O | Withstands up to 6.5 V on any I/O pin regardless of VCCA/VCCB - simplifies interface to legacy 5-V peripherals |
| Configurable channel control | Two independent DIR/OE pairs allow asynchronous direction switching and selective channel disable - supports multi-bus arbitration |
Applications
| Industrial PLC Backplane Interconnect | Automotive ADAS Sensor Hub |
|---|---|
Use Scenario: Connecting 3.3-V FPGA-based motion controller to legacy 5-V analog I/O modules via shared backplane. IC Role / Device Role / Timing Role: Bidirectional level translator managing data and address lines between mismatched voltage domains with precise timing control. Use Value: Eliminates need for discrete level-shifting components; VCC isolation prevents bus lockup during module hot-plug events. |
Use Scenario: Interfacing 1.8-V image sensor and 2.5-V radar processor to 3.3-V central domain controller in camera/radar fusion unit. IC Role / Device Role / Timing Role: Dual-channel translator enabling simultaneous sensor data aggregation with sub-10 ns propagation delay consistency. Use Value: Ioff support allows safe power gating of sensor subsystems without affecting controller bus integrity. |
| Enterprise SSD Controller Interface | Telecom Baseband Processor Bridge |
Use Scenario: Linking 1.2-V NVMe controller core to 1.8-V NAND flash memory array with strict timing margins. IC Role / Device Role / Timing Role: High-speed transceiver providing deterministic 0.7 ns min tPLH (B→A) at 1.8-V/1.2-V operation for command/address routing. Use Value: Overvoltage tolerance protects flash I/Os from transient overshoot during high-speed switching. |
Use Scenario: Bridging 2.5-V baseband DSP to 3.3-V RF front-end ASIC in 5G small-cell radio unit. IC Role / Device Role / Timing Role: Dual-supply translator supporting concurrent uplink/downlink data paths with independent DIR control per channel. Use Value: Configurable dual-rail design avoids custom PCB layout for voltage-domain partitioning - reduces BOM count by 3+ discrete translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245 | Lower VCC min (1.2 V), higher speed (tPLH down to 0.2 ns), but no VCC isolation or Ioff spec | Suitable for ultra-low-voltage, high-frequency designs where power sequencing robustness is secondary | Choose when operating below 1.65 V or requiring <0.5 ns propagation delay; avoid if VCC isolation is required |
| TXB0108PWR | Auto-direction sensing (no DIR pin), 8-bit only, lower drive (±24 mA), no VCC isolation | Best for simple unidirectional or auto-sensed data links with space-constrained layouts | Prefer for compact 8-bit interfaces without explicit direction control; not suitable for bidirectional protocols requiring DIR coordination |
Compared with SN74LVC16T245, SN74AVCH16T245 offers superior speed and lower voltage operation but sacrifices VCC isolation and Ioff protection-critical for industrial power sequencing. TXB0108PWR reduces pin count and simplifies control but lacks per-channel DIR/OE granularity and failsafe isolation behavior.
Availability
SN74LVC16T245 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, enterprise storage, and automotive ADAS applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SN74LVC16T245 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 50 years of innovation in high-reliability interface ICs.
The SN74LVC16T245 belongs to TI's LVC logic family, designed specifically for robust mixed-voltage system interconnects in industrial, automotive, and communications equipment where power sequencing resilience and wide supply range are mandatory.
FAQ
What is the minimum operating voltage for SN74LVC16T245 on VCCA and VCCB?
The SN74LVC16T245 supports a minimum supply voltage of 1.65 V on both VCCA and VCCB rails across the full industrial temperature range (–40°C to +85°C). Operation below 1.65 V is not characterized or guaranteed, and may result in undefined logic states or increased ICCZ leakage.
Does SN74LVC16T245 support automatic direction detection like auto-sensing translators?
No, SN74LVC16T245 requires explicit control of the 1DIR and 2DIR inputs to determine data flow direction. It does not implement auto-sensing circuitry. Direction must be set prior to data transmission, and changes require synchronization with OE to avoid bus contention.
Can SN74LVC16T245 safely interface a 5-V microcontroller to a 1.8-V FPGA?
Yes, SN74LVC16T245 can safely translate between 5-V and 1.8-V domains. Its overvoltage-tolerant I/Os withstand up to 6.5 V, and its dual-rail architecture allows VCCA = 5 V and VCCB = 1.8 V. Ensure OE is held high during power-up until both rails stabilize to prevent glitches.
What happens to SN74LVC16T245 outputs when VCCA = GND but VCCB = 3.3 V?
When VCCA = GND, the SN74LVC16T245 activates its VCC isolation feature: both A-port and B-port outputs enter high-impedance state regardless of DIR or OE states. This prevents false logic from propagating to the live 3.3-V bus and protects downstream devices.
Is SN74LVC16T245 pin-compatible with SN74LVC16245?
No, SN74LVC16T245 is not pin-compatible with SN74LVC16245. The 'T' variant uses dual-supply architecture with separate VCCA/VCCB and 48-pin SSOP/TSSOP packages, while SN74LVC16245 is single-supply (VCC only) in 48-pin SOIC or TSSOP. Pin assignments, power domains, and control logic differ fundamentally.
SN74LVC16T245DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVC16T245DL FAQ
1.How can I place an order for SN74LVC16T245DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC16T245DL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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Once your SN74LVC16T245DL 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 SN74LVC16T245DL?
For technical support, including SN74LVC16T245DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC16T245DL requirements.
6.How does Aetrix verify that SN74LVC16T245DL is sourced from the original manufacturer or authorized distributors?
All SN74LVC16T245DL 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 SN74LVC16T245DL meets industry standards.
7.What is the process for return or replacement of SN74LVC16T245DL?
All SN74LVC16T245DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC16T245DL, 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 SN74LVC16T245DL part is unused and in its original packaging.
Return procedure for SN74LVC16T245DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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