My Inquiry
My Account
Texas Instruments SN74LVT245BZQNR
- Part No.:
- SN74LVT245BZQNR
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFBGA
- Datasheet:
-
SN74LVT245BZQNR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,589
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVT245BZQNR from Texas Instruments is an octal bus transceiver designed for 3.3-V VCC operation with mixed-mode 5-V input/output tolerance, supporting bidirectional data flow between A and B buses under DIR control and high-impedance isolation via OE, with Ioff and power-up 3-state for hot insertion in industrial backplane and FPGA interface applications.
For engineers reviewing the SN74LVT245BZQNR datasheet, SN74LVT245BZQNR pinout, SN74LVT245BZQNR application, or SN74LVT245BZQNR equivalent, key selection criteria include 3.3-V supply compatibility, 5-V tolerant I/O, hot-swap support, output drive strength (64 mA sink), and VFBGA-20 (ZQN) package thermal performance (θJA = 78°C/W).
Technical Context
The SN74LVT245BZQNR implements TTL-compatible level translation with asynchronous bidirectional bus control: DIR selects direction (A→B or B→A), while OE enables/disables all outputs simultaneously into high-impedance state. Its Ioff circuitry blocks current backflow during power-down, and power-up 3-state ensures outputs remain Hi-Z until VCC stabilizes.
It operates across 2.7–3.6 V VCC, supports 5.5-V inputs, delivers VOL ≤ 0.55 V at 64 mA sink, VOH ≥ 2.0 V at −32 mA source, and achieves tPLH/tPHL ≤ 3.5 ns (VCC = 3.3 V, CL = 50 pF). Latch-up immunity exceeds 100 mA per JESD 78 Class II.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Enables stable operation from unregulated batteries down to 2.7 V without external regulation. |
| I/O Voltage Tolerance | Up to 5.5 V - Allows direct interfacing with legacy 5-V TTL logic without level-shifting components. |
| Output Drive | 64 mA sink / 32 mA source - Sufficient to drive multiple TTL loads or trace capacitance in dense PCB layouts. |
| Propagation Delay | ≤ 3.5 ns - Supports high-speed data transfer up to ~100 MHz bus rates in synchronous systems. |
| Hot-Insertion Support | Ioff and power-up 3-state - Prevents damaging current flow and bus contention during live board insertion. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets industrial-grade robustness requirements for handling and field operation. |
| Latch-Up Immunity | >100 mA per JESD 78 Class II - Ensures reliability in noisy or fault-prone power environments. |
Pinout & Package
VFBGA-20 package (ZQN), 3.0 mm × 3.0 mm, 0.5-mm ball pitch, lead-free, bottom-terminal array with standard MicroStar Junior configuration per JEDEC MO-225 variation BC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Input/Output port A | 8-bit bidirectional data terminal connected to local bus (e.g., FPGA or ASIC side); tolerates 5-V signals at 3.3-V VCC. |
| B1–B8 | Input/Output port B | 8-bit bidirectional data terminal connected to remote bus (e.g., legacy controller or memory side); same 5-V tolerance. |
| DIR | Direction control input | Active-High logic: HIGH routes A→B, LOW routes B→A; no internal pullup/pulldown - requires external bias if floating. |
| OE | Output enable input | Active-LOW: LOW enables transceiver, HIGH forces all A/B pins into high-impedance state; tied to VCC via pullup for safe power-up. |
| VCC | Supply voltage | 3.3-V nominal supply; accepts 2.7–3.6 V; powers internal logic and output drivers; decoupling required near ball A1. |
| GND | Ground reference | Primary return path for I/O and supply currents; two dedicated GND balls (E4, E5) minimize ground bounce (VOLP < 0.8 V). |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant I/O on 3.3-V VCC eliminates need for external level shifters in hybrid-voltage systems. |
| Hot-insertion support | Ioff limits reverse current to ±100 µA at VCC = 0, enabling safe insertion into live backplanes or hot-swap modules. |
| Power-up 3-state | Outputs remain Hi-Z until VCC reaches functional threshold (~1.5 V), preventing bus conflicts during power ramp. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V ensures signal integrity during heavy simultaneous switching of all 8 outputs. |
| Industry-standard ESD/latch-up | Exceeds JESD 22 (HBM/MM/CDM) and JESD 78 Class II - qualified for industrial and telecom infrastructure use. |
Applications
| Industrial Backplane Interface | FPGA-to-ASIC Data Bridge |
|---|---|
|
Use Scenario: Connecting a 3.3-V FPGA I/O bank to a 5-V legacy peripheral bus in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing data flow direction via FPGA-controlled DIR and enabling via OE. Use Value: Eliminates discrete level-shifters and reduces BOM count while maintaining timing margin (tPLH ≤ 3.5 ns) for 20-MHz control bus operation. |
Use Scenario: Isolating and translating between two voltage domains in a multi-FPGA system with shared memory-mapped registers. IC Role / Device Role / Timing Role: Octal transceiver providing controlled, isolated data path with Hi-Z disable during FPGA reconfiguration cycles. Use Value: Power-up 3-state prevents bus contention during partial reconfiguration, and Ioff protects FPGA I/O pins during hot-swap events. |
| Telecom Line Card Interconnect | Automotive ADAS Sensor Hub |
|
Use Scenario: Interfacing a 3.3-V baseband processor to 5-V analog front-end ICs on a hot-pluggable line card in optical transport equipment. IC Role / Device Role / Timing Role: Hot-insertion–qualified bus buffer enabling live replacement without system shutdown or signal corruption. Use Value: Meets GR-63-CORE shock/vibration specs via robust ZQN package and JESD 78 latch-up immunity (>100 mA). |
Use Scenario: Aggregating sensor data from multiple 5-V analog sensors (e.g., radar, camera) into a 3.3-V domain microcontroller in advanced driver-assistance systems. IC Role / Device Role / Timing Role: Voltage-tolerant data translator with ESD protection (2000-V HBM) meeting ISO 10605 automotive requirements. Use Value: Integrated ESD and latch-up hardening reduces need for external protection components, saving PCB area in space-constrained ECUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Lower drive (24 mA sink), 1.65–3.6 V VCC, no Ioff or power-up 3-state | Suitable only for non-hot-swap, low-noise 3.3-V-only systems; lacks 5-V tolerance and robust insertion support | Choose when cost sensitivity outweighs hot-swap requirement and 5-V interfacing is unnecessary. |
| TXB0108PWR | Auto-direction sensing, 1.2–3.6 V dual-supply, higher propagation delay (6.2 ns), no 5-V tolerance | Designed for automatic bidirectional translation between disparate low-voltage domains (e.g., 1.8 V ↔ 3.3 V), not mixed 3.3/5-V | Select only for fully autonomous direction detection in ultra-low-voltage systems where 5-V compatibility is irrelevant. |
Compared with SN74LVC245APWR and TXB0108PWR, the SN74LVT245BZQNR uniquely combines 5-V I/O tolerance, hot-insertion capability, and sub-4-ns timing - making it irreplaceable in legacy-system integration where voltage bridging and live maintenance are mandatory.
Availability
SN74LVT245BZQNR is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA-to-peripheral bridges, telecom line cards, and automotive ADAS sensor hubs requiring stable component supply across extended temperature (−40°C to 85°C) and long-lifecycle programs.
Supply support for SN74LVT245BZQNR 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 headquartered in Dallas, Texas, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets since 1930.
The SN74LVT245BZQNR belongs to TI's LVT logic family, engineered specifically for mixed-voltage system interconnection with emphasis on hot-swap resilience, noise immunity, and timing predictability in mission-critical infrastructure.
FAQ
What is the maximum input voltage the SN74LVT245BZQNR can tolerate on its A/B pins?
The SN74LVT245BZQNR supports input voltages up to 5.5 V on all A and B port pins, regardless of VCC level (2.7–3.6 V), enabling direct connection to 5-V TTL logic without external clamping or level-shifting circuitry. This 5-V tolerance is explicitly specified in the recommended operating conditions table and verified across temperature.
Does the SN74LVT245BZQNR support hot insertion, and how is it implemented?
Yes, the SN74LVT245BZQNR supports hot insertion via two integrated features: Ioff circuitry disables outputs and limits reverse current to ±100 µA when VCC = 0, and power-up 3-state holds all outputs in high-impedance until VCC reaches functional threshold. These are documented in the device description and absolute maximum ratings sections of the SCES004H datasheet.
What is the thermal resistance (θJA) of the SN74LVT245BZQNR in its ZQN package?
The SN74LVT245BZQNR in the ZQN (VFBGA-20) package has a junction-to-ambient thermal resistance (θJA) of 78°C/W, as specified in the absolute maximum ratings table. This value assumes standard JEDEC test board conditions per JESD 51-7 and is critical for thermal design in enclosed or high-power-density applications.
Can the SN74LVT245BZQNR be used with a 2.5-V supply?
No - the SN74LVT245BZQNR is not rated for 2.5-V operation. Its recommended VCC range is strictly 2.7 V to 3.6 V, with minimum supply voltage defined by both functional operation (2.7 V) and Ioff specification (VCC = 0). Operation below 2.7 V may result in undefined logic states or failure to meet timing and drive specifications.
How does the DIR pin control data flow direction in the SN74LVT245BZQNR?
In the SN74LVT245BZQNR, the DIR pin is an active-HIGH control: when DIR = HIGH, data flows from A bus to B bus; when DIR = LOW, data flows from B bus to A bus. This behavior is confirmed in the FUNCTION TABLE and logic diagram of the SCES004H datasheet, and DIR has no internal pullup - external biasing is required if left unconnected.
SN74LVT245BZQNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVT
- Package/Case:
- 20-VFBGA
- Packaging:
- Tape & Reel (TR)
- 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:
- 20-BGA MICROSTAR JUNIOR (4x3)
SN74LVT245BZQNR FAQ
1.How can I place an order for SN74LVT245BZQNR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT245BZQNR 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 SN74LVT245BZQNR reliable?
The price and inventory of SN74LVT245BZQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT245BZQNR is usually 5 days.
3.What payment methods are accepted for SN74LVT245BZQNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT245BZQNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVT245BZQNR?
SN74LVT245BZQNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT245BZQNR 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 SN74LVT245BZQNR?
For technical support, including SN74LVT245BZQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT245BZQNR requirements.
6.How does Aetrix verify that SN74LVT245BZQNR is sourced from the original manufacturer or authorized distributors?
All SN74LVT245BZQNR 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 SN74LVT245BZQNR meets industry standards.
7.What is the process for return or replacement of SN74LVT245BZQNR?
All SN74LVT245BZQNR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT245BZQNR, 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 SN74LVT245BZQNR part is unused and in its original packaging.
Return procedure for SN74LVT245BZQNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVT245BZQNR 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…
