My Inquiry
My Account
Nexperia USA Inc. 74LVT245D,118
- Part No.:
- 74LVT245D,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVT245D,118.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:14,133
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVT245D,118 from Nexperia is an octal 3-state bidirectional transceiver with direction control (DIR) and output enable (OE), designed for 3.3 V bus interface applications. It features ±64 mA/–32 mA drive strength, 5.5 V overvoltage-tolerant inputs, bus-hold inputs eliminating external pull-ups, and operates from –40 °C to +85 °C. Used in backplane data routing between 3.3 V logic domains and legacy 5 V buses.
For engineers reviewing the 74LVT245D,118 datasheet, 74LVT245D,118 pinout, 74LVT245D,118 application, or 74LVT245D,118 equivalent, key selection criteria include 3-state timing (tPLZ ≤ 4.8 ns), IOFF power-down capability, JEDEC JESD8C compliance (2.7–3.6 V), and SO20 package compatibility with legacy PCB footprints.
Technical Context
This BiCMOS transceiver implements dual-bus bidirectional data flow controlled by DIR (active-HIGH for A→B, active-LOW for B→A) and OE (active-LOW). Its IOFF circuitry ensures no current leakage when VCC = 0 V, enabling live insertion/extraction in hot-swap systems.
Bus-hold inputs maintain valid logic states on unused A/B pins without external resistors, while overvoltage tolerance up to 5.5 V allows direct interfacing with TTL-level signals. Propagation delays are specified at 2.7 V and 3.3 V, with tPLH/tPHL ≤ 4.0 ns (VCC = 3.3 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Ensures compatibility with 3.3 V systems while tolerating rail droop during transient load conditions. |
| Input Voltage Range | 0 V to 5.5 V - Enables direct connection to 5 V TTL buses without level-shifting components. |
| Output Drive | +64 mA / –32 mA - Supports driving heavy capacitive loads (e.g., >50 pF traces) and fan-out to multiple CMOS inputs. |
| Propagation Delay | tPLH/tPHL ≤ 4.0 ns @ 3.3 V - Meets high-speed synchronous bus timing budgets up to ~100 MHz clock domains. |
| Bus-Hold Current | IBHL = 75–150 μA, IBHH = –150 to –75 μA - Actively maintains input state with <150 μA static current, eliminating need for 10 kΩ pull-up/down resistors. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - Prevents back-driving of powered-down buses during partial system power-down sequences. |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - Satisfies industrial IEC 61000-4-2 immunity requirements without additional protection circuitry. |
Pinout & Package
74LVT245D,118 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 index located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | HIGH enables A→B data flow; LOW enables B→A - critical for half-duplex bus arbitration in shared-memory interfaces. |
| 2–9 (A0–A7) | Port A data I/O | Bidirectional data terminals with bus-hold - retain last valid logic state when disconnected, preventing floating inputs. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers - must be low-impedance to minimize ground bounce during switching. |
| 11–18 (B0–B7) | Port B data I/O | Second bidirectional port with identical bus-hold behavior - supports mirrored interface to separate subsystems (e.g., CPU ↔ peripheral bus). |
| 19 (OE) | Output enable (active LOW) | Drives all A/B outputs to high-impedance when HIGH - enables multi-drop bus sharing and prevents contention during reset. |
| 20 (VCC) | Supply voltage | 3.3 V nominal supply - decoupling capacitor (100 nF) required within 10 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Withstands 5.5 V inputs while powered from 3.3 V - eliminates level translators in mixed-voltage backplanes. |
| IOFF partial power-down | Blocks current flow between ports when VCC = 0 V - enables safe hot-plug insertion into live 5 V backplanes. |
| Bus-hold inputs | Maintains logic state on unconnected A/B pins using internal feedback - removes requirement for 10 kΩ external pull resistors per line. |
| Live insertion/extraction support | Guaranteed non-disruptive operation during board insertion into powered systems - validated per JEDEC JESD78 latch-up Class II (>500 mA). |
| 3-state timing control | tPZH/tPHZ ≤ 5.9 ns @ 3.3 V - ensures clean bus release before new driver activation, preventing short-duration bus contention. |
Applications
| Industrial Backplane Interface | Embedded Memory Expansion |
|---|---|
|
Use Scenario: Interfacing a 3.3 V microcontroller to a legacy 5 V ISA-style backplane with shared address/data lines. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing direction and 3-state control under CPU arbitration logic. Use Value: Eliminates discrete level shifters and pull-up networks while maintaining signal integrity across 20 cm trace lengths. |
Use Scenario: Expanding external SRAM/Flash memory space on a 3.3 V SoC with limited native bus width. IC Role / Device Role / Timing Role: Octal data path extender synchronized to SoC's external memory controller strobes. Use Value: Provides 8-bit parallel data transfer at ≤10 ns propagation delay, meeting 66 MHz memory access timing windows. |
| Hot-Swappable Module Interface | Legacy Peripheral Bridge |
|
Use Scenario: Enabling field-replaceable I/O modules in programmable logic controllers with powered backplanes. IC Role / Device Role / Timing Role: Isolation buffer with IOFF and live-insertion support for module-side bus termination. Use Value: Prevents bus corruption during module insertion/removal by disabling outputs before VCC ramp-up completes. |
Use Scenario: Connecting modern 3.3 V FPGAs to legacy 5 V UART, SPI, or GPIO peripherals in test equipment. IC Role / Device Role / Timing Role: Voltage-tolerant bidirectional bridge translating logic levels without timing skew. Use Value: Maintains full 5 V TTL input thresholds while driving 3.3 V CMOS loads, reducing BOM count by 3 components per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245A (TI) | Lower drive (+32 mA/–32 mA), narrower VCC range (1.65–3.6 V), no bus-hold | Requires external pull resistors; unsuitable for unconnected bus segments | Select when lower power consumption is prioritized over robustness on unterminated buses. |
| 74ALVC245 (Nexperia) | Same pinout, higher speed (tPLH ≤ 3.2 ns), but no 5.5 V overvoltage tolerance | Cannot interface directly with 5 V TTL without external clamping | Choose for pure 3.3 V systems demanding minimal propagation delay and reduced EMI. |
Compared with SN74LVC245A and 74ALVC245, the 74LVT245D,118 uniquely combines 5.5 V input tolerance, bus-hold, and ±64 mA drive - making it optimal for ruggedized 3.3 V/5 V mixed-signal interconnect where reliability outweighs marginal speed gains.
Availability
74LVT245D,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded memory expansion, hot-swappable module designs, and legacy peripheral bridging requiring stable component supply across extended temperature ranges.
Supply support for 74LVT245D,118 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
Nexperia is a global semiconductor expert focused on high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets, with manufacturing rooted in process innovation and quality rigor.
The 74LVT series targets high-speed, mixed-voltage digital interfacing applications - specifically engineered for robust 3.3 V bus translation with legacy system compatibility and enhanced ESD/latch-up resilience.
FAQ
Can 74LVT245D,118 operate with a 2.5 V supply?
No. The device is specified only for 2.7 V to 3.6 V operation per JEDEC JESD8C. At 2.5 V, VIH minimum (2.0 V) and VOH performance fall outside guaranteed limits, risking logic misreads and reduced noise margin. Operation below 2.7 V voids parametric guarantees.
Does the SO20 package (SOT163-1) support reflow soldering per JEDEC J-STD-020?
Yes. The 74LVT245D,118 in SO20 package is qualified for standard Pb-free reflow profiles with peak temperature up to 260 °C (per JEDEC J-STD-020D.02), including preheat, soak, and ramp-to-peak phases. Moisture sensitivity level is MSL3.
How does bus-hold functionality behave when both A and B ports are unconnected?
Each A0–A7 and B0–B7 pin has independent bus-hold circuitry. When left floating, each pin retains its last driven logic state (HIGH or LOW) via internal feedback resistors (~100 kΩ), drawing ≤150 μA - no external biasing is needed for either port.
Is DIR pin latched or edge-sensitive?
The DIR pin is level-sensitive, not latched or edge-triggered. Direction changes occur synchronously with DIR voltage transitions while OE is LOW. No internal storage or metastability mitigation is provided - external synchronization logic is required for asynchronous DIR updates.
74LVT245D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SO
74LVT245D,118 FAQ
1.How can I place an order for 74LVT245D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT245D,118 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 74LVT245D,118 reliable?
The price and inventory of 74LVT245D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT245D,118 is usually 5 days.
3.What payment methods are accepted for 74LVT245D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT245D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT245D,118?
74LVT245D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT245D,118 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 74LVT245D,118?
For technical support, including 74LVT245D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT245D,118 requirements.
6.How does Aetrix verify that 74LVT245D,118 is sourced from the original manufacturer or authorized distributors?
All 74LVT245D,118 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 74LVT245D,118 meets industry standards.
7.What is the process for return or replacement of 74LVT245D,118?
All 74LVT245D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT245D,118, 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 74LVT245D,118 part is unused and in its original packaging.
Return procedure for 74LVT245D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVT245D,118 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…
