My Inquiry
My Account
Texas Instruments SN74LVC16T245GQLR
- Part No.:
- SN74LVC16T245GQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74LVC16T245GQLR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,454
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC16T245 from Texas Instruments is a 16-bit dual-supply noninverting bus transceiver with configurable level-shifting, supporting bidirectional voltage translation between 1.65 V–5.5 V domains (e.g., 1.8 V ↔ 3.3 V). It features independent VCCA and VCCB rails, tri-state outputs controlled by DIR/OE pins, and Ioff partial-power-down protection. It is used in mixed-voltage system interconnects such as FPGA-to-ASIC data buses.
For engineers reviewing the SN74LVC16T245 datasheet, SN74LVC16T245 pinout, SN74LVC16T245 application, or SN74LVC16T245 equivalent, key selection criteria include dual-rail supply flexibility, guaranteed high-impedance isolation during power sequencing, VCC isolation behavior, and verified 200 MHz data-rate capability at 3.3 V → 5 V translation under 15 pF load.
Technical Context
The SN74LVC16T245 implements two independent 8-bit transceiver channels (1A↔1B and 2A↔2B), each with dedicated DIR and OE controls referenced to VCCA. Direction control is asynchronous and non-latched: DIR = HIGH enables A→B flow; DIR = LOW enables B→A flow. OE = HIGH forces both ports into high-impedance regardless of DIR state.
VCCA powers all control inputs (1DIR, 2DIR, 1OE, 2OE) and A-port I/Os; VCCB powers B-port I/Os. The device guarantees Ioff ≤ ±2 µA when either VCC rail is at 0 V, and supports overvoltage-tolerant I/Os up to 6.5 V in high-Z state - enabling safe interfacing with legacy 5 V systems while operating from 1.8 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.65 V to 5.5 V per rail - enables translation across 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without external level shifters |
| Max Data Rate | 200 MHz (3.3 V → 5 V, CL = 15 pF) - supports high-speed parallel bus interfaces including memory expansion and peripheral bridging |
| Ioff Current | ≤ ±2 µA at TA = –40°C to 85°C - prevents backflow current during partial power-down, critical for hot-swap and power-gated subsystems |
| VCC Isolation | Both ports enter high-Z if VCCA = GND or VCCB = GND - eliminates bus contention during asymmetric power-up/down sequences |
| tPLH / tPHL (A→B) | 0.4 ns to 21.9 ns (VCCA = 1.8 V, VCCB = 5 V) - propagation delay varies with supply pair; worst-case defines minimum clock period |
| IOH / IOL Drive | –32 mA / +32 mA at VCC = 4.5 V - sufficient to drive 50 Ω transmission lines or multiple CMOS loads without external buffers |
| ESD Rating | ±2000 V HBM - meets industrial-grade ESD robustness requirements for board-level handling and field operation |
Pinout & Package
TSSOP-48 package (12.50 mm × 6.10 mm); 48-pin surface-mount with exposed thermal pad (GQL suffix). Pin numbering follows standard TSSOP top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction-control input | Asynchronous control: HIGH = A→B data flow; LOW = B→A flow; referenced to VCCA |
| 1OE, 2OE | Output-enable input | Active-LOW enable: LOW = output enabled; HIGH = both A/B ports forced to high-Z; referenced to VCCA |
| 1A1–1A8, 2A1–2A8 | A-port I/O | Bidirectional data lines referenced to VCCA; tolerate VI up to 6.5 V in high-Z state |
| 1B1–1B8, 2B1–2B8 | B-port I/O | Bidirectional data lines referenced to VCCB; tolerate VI up to 6.5 V in high-Z state |
| VCCA | A-port supply | Must be stable before asserting DIR/OE; powers A I/Os and all control inputs |
| VCCB | B-port supply | Independent rail; powers only B I/Os; no control signal dependency |
| GND | Ground reference | Common return for both VCCA and VCCB; requires low-inductance PCB connection |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Each port operates independently across full 1.65 V–5.5 V range - eliminates need for discrete level-shifter ICs in heterogeneous SoC interconnects |
| VCC isolation | Automatic high-Z on both ports if either VCCA or VCCB = 0 V - prevents bus contention during staggered power sequencing in multi-rail systems |
| Ioff partial-power-down | Guaranteed ≤ ±2 µA off-state current - enables safe insertion/removal in live-backplane applications without damaging upstream drivers |
| Overvoltage-tolerant I/Os | Withstands up to 6.5 V on A/B pins in high-Z state - allows direct interface to 5 V peripherals while powered from 1.8 V or 2.5 V rails |
| Configurable channel grouping | Two independent 8-bit sections (1x and 2x) with separate DIR/OE - supports asymmetric data flow (e.g., command up / status down) without cross-talk |
Applications
| Industrial PLC Backplane Interface | FPGA-to-ASIC Voltage Bridging |
|---|---|
Use Scenario: Connecting 3.3 V FPGA I/O banks to legacy 5 V sensor acquisition modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level translator managing command writes (FPGA→sensor) and status reads (sensor→FPGA) on shared parallel bus. Use Value: Eliminates discrete resistor-divider networks or dedicated level-shifter ICs; VCC isolation prevents bus lockup during FPGA configuration reset. | Use Scenario: Interfacing 1.8 V ASIC core logic with 2.5 V DDR2 memory controller in embedded vision processing unit. IC Role / Device Role / Timing Role: Synchronous data bridge with sub-5 ns propagation delay ensuring setup/hold timing margins at 100 MHz DDR2 clock rates. Use Value: Ioff support enables ASIC power gating without disrupting memory controller operation; dual-channel independence isolates address/data paths. |
| Automotive Infotainment Head Unit | Enterprise SSD Controller Interface |
Use Scenario: Linking 3.3 V microcontroller UART peripherals to 5 V CAN transceiver modules in automotive dashboard systems. IC Role / Device Role / Timing Role: Asymmetric level shifter enabling MCU-side control signaling (3.3 V) and transceiver-side fault reporting (5 V). Use Value: Overvoltage tolerance protects MCU I/Os from 5 V transceiver fault conditions; HBM ±2000 V rating meets automotive EMC requirements. | Use Scenario: Translating between 1.65 V NVMe controller signals and 3.3 V PCIe switch management interfaces in enterprise solid-state drives. IC Role / Device Role / Timing Role: High-speed bidirectional translator supporting PCIe Gen3 sideband communication (CLKREQ#, PERST#) with <10 ns enable/disable times. Use Value: Guaranteed tPZH/tPZL < 32 ns ensures reliable reset signaling during hot-plug events; dual-rail design accommodates mixed-voltage SSD firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245 | Higher speed (tPLH ≤ 3.2 ns @ 3.3 V), lower VCC min (1.2 V), but no VCC isolation feature | Suitable for high-frequency DDR interfaces where power sequencing is tightly controlled; not recommended for hot-swap or asymmetric power-up scenarios | Select when maximum data rate > 300 MHz is required and VCC rails ramp synchronously |
| TXB0108PWR | Auto-direction sensing (no DIR pin), 8-bit only, lower drive strength (±8 mA), no Ioff spec | Better for simple GPIO expansion; unsuitable for synchronous bus protocols requiring explicit direction control and high-current drive | Select for low-pin-count, low-speed I²C/SPI peripheral expansion where direction is infrequent and predictable |
Compared with SN74AVCH16T245 and TXB0108PWR, the SN74LVC16T245 uniquely balances robust VCC isolation, guaranteed Ioff, and 16-bit channel density - making it optimal for industrial backplanes and automotive systems where power sequencing reliability outweighs peak speed requirements.
Availability
SN74LVC16T245 is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and enterprise storage 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 company specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and interface solutions.
The SN74LVC16T245 belongs to TI's LVC logic family, designed specifically for low-voltage, mixed-domain system interconnects where voltage translation, power sequencing resilience, and industrial-grade reliability are mandatory.
FAQ
What is the minimum supply voltage required for reliable operation of the SN74LVC16T245?
The SN74LVC16T245 operates reliably with VCCA and VCCB as low as 1.65 V. Below this threshold, VIH/VIL thresholds degrade, propagation delays increase significantly, and Ioff protection is no longer guaranteed per datasheet specifications. For 1.8 V system designs, operation is fully characterized and recommended.
Can the SN74LVC16T245 translate between 1.8 V and 5 V logic levels in both directions?
Yes, the SN74LVC16T245 supports bidirectional translation between 1.8 V and 5 V domains. When VCCA = 1.8 V and VCCB = 5 V, it translates 1.8 V inputs to 5 V outputs (A→B); when VCCA = 5 V and VCCB = 1.8 V, it translates 5 V inputs to 1.8 V outputs (B→A), with all parameters validated per SCES636B.
Does the SN74LVC16T245 require external pull-up resistors on DIR or OE pins?
No external pull-ups are required on DIR pins, but TI recommends tying OE to VCCA via a pull-up resistor (value determined by driver sink capability) to ensure high-Z state during power-up/power-down. This prevents undefined bus states before VCCA and VCCB stabilize.
How does the VCC isolation feature behave if only VCCA is powered and VCCB is floating?
If VCCB is floating (not connected to GND or supply), the VCC isolation feature does not activate - the device may exhibit undefined behavior or excessive ICC. VCCB must be actively driven to GND or its nominal supply to guarantee high-Z operation per the isolation specification. Floating VCCB violates recommended operating conditions.
Is the SN74LVC16T245 pin-compatible with other 16-bit transceivers in the same package?
The SN74LVC16T245 is not pin-compatible with SN74LVC16245 or SN74ALVC16245 due to different DIR/OE pin assignments and internal architecture. Its pinout is unique to the LVC16T245 family and matches only SN74LVC16T245 variants (e.g., SN74LVC16T245DGGR, SN74LVC16T245ZQLR) in identical TSSOP/TVSOP packages.
SN74LVC16T245GQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 56-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 56-BGA Microstar Junior (7x4.5)
SN74LVC16T245GQLR FAQ
1.How can I place an order for SN74LVC16T245GQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC16T245GQLR 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 SN74LVC16T245GQLR reliable?
The price and inventory of SN74LVC16T245GQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC16T245GQLR is usually 5 days.
3.What payment methods are accepted for SN74LVC16T245GQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC16T245GQLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC16T245GQLR?
SN74LVC16T245GQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC16T245GQLR 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 SN74LVC16T245GQLR?
For technical support, including SN74LVC16T245GQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC16T245GQLR requirements.
6.How does Aetrix verify that SN74LVC16T245GQLR is sourced from the original manufacturer or authorized distributors?
All SN74LVC16T245GQLR 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 SN74LVC16T245GQLR meets industry standards.
7.What is the process for return or replacement of SN74LVC16T245GQLR?
All SN74LVC16T245GQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC16T245GQLR, 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 SN74LVC16T245GQLR part is unused and in its original packaging.
Return procedure for SN74LVC16T245GQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC16T245GQLR 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
