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Nexperia USA Inc. 74ABT245DB,118
- Part No.:
- 74ABT245DB,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT245DB,118.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,407
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Product details
Overview
74ABT245DB,118 from Nexperia is an octal bidirectional 3-state transceiver with independent direction (DIR) and output enable (OE) controls, operating at 4.5–5.5 V. It provides ±64 mA/–32 mA drive capability, IOFF partial power-down protection, and operates across –40 °C to +85 °C for bus isolation in industrial control backplanes.
For engineers reviewing the 74ABT245DB,118 datasheet, 74ABT245DB,118 pinout, 74ABT245DB,118 application, or 74ABT245DB,118 equivalent, key selection criteria include bidirectional data flow control, high-speed propagation delays (tPLH/tPHL ≤ 4.6 ns), IOFF-enabled hot-swap capability, and SO20 package compatibility with legacy 74-series layouts.
Technical Context
The device implements a dual-bus interface with separate A-side (pins 2–9) and B-side (pins 11–18) 8-bit I/O ports, controlled by DIR (pin 1) to determine data flow direction (A→B or B→A). OE (pin 19) independently places all outputs into high-impedance state regardless of DIR state.
Its BiCMOS architecture enables TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and fast switching with tPZH/tPLZ ≤ 5.3 ns, while IOFF circuitry limits off-state leakage to ±100 μA when VCC = 0 V-critical for live insertion and multi-voltage domain isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - ensures robust operation under industrial rail tolerances without level-shifting. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns - supports >200 MHz bus toggle rates in synchronous systems. |
| Output Drive | +64 mA / –32 mA - drives heavy capacitive loads (e.g., 50 pF buses) with clean edges. |
| IOFF Leakage | ±100 μA at VCC = 0 V - prevents backfeed current during partial power-down sequencing. |
| Operating Temp | –40 °C to +85 °C - qualified for extended industrial ambient environments. |
| ESD Rating | HBM >2000 V, CDM >1000 V - withstands handling and board-level ESD events. |
| Input Clamping | VIK ≥ –1.2 V - protects inputs against negative transients on shared bus lines. |
Pinout & Package
74ABT245DB,118 is supplied in SO20 (SOT163-1) package: plastic small outline, 20 leads, 7.5 mm body width, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Active-HIGH signal selecting A→B (DIR=H) or B→A (DIR=L) data path. |
| 2–9 (A0–A7) | A-side I/O port | Bidirectional data pins connected to local subsystem bus; high-impedance when OE=H. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers. |
| 11–18 (B0–B7) | B-side I/O port | Bidirectional data pins interfacing to upstream/downstream bus segment. |
| 19 (OE) | Output enable (active LOW) | When HIGH, forces all A/B outputs into 3-state; overrides DIR for bus isolation. |
| 20 (VCC) | Power supply | 5 V nominal supply; IOFF remains active even during VCC ramp-down. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional interface | Enables full-duplex or half-duplex data exchange between two 8-bit buses using single control signals. |
| IOFF partial power-down | Prevents destructive back-current when VCC is removed while A/B buses remain energized. |
| Live insertion/extraction support | IOFF + 3-state operation allows safe hot-plug of daughter cards without system reset. |
| TTL-compatible input thresholds | Accepts standard 5 V TTL logic levels without external biasing or level translation. |
| Latch-up immunity | Exceeds 500 mA per JESD78 Class II - eliminates risk of destructive latch-up in noisy environments. |
Applications
| Industrial Backplane Isolation | Legacy System Bus Extension |
|---|---|
Use Scenario: Isolating CPU and peripheral modules on a DIN-rail mounted PLC backplane where power domains may sequence independently. IC Role / Device Role / Timing Role: Bidirectional data bridge enabling read/write access between isolated 5 V domains while maintaining signal integrity. Use Value: IOFF prevents backfeed during module hot-swap; 4.6 ns max propagation delay preserves timing margins in 25 MHz parallel bus cycles. | Use Scenario: Extending a vintage 8086-based SBC bus to add new I/O expansion cards without modifying existing address/data routing. IC Role / Device Role / Timing Role: Level-consistent transceiver translating between local and extended bus segments with direction-controlled flow. Use Value: TTL-compatible inputs eliminate need for external translators; SO20 footprint matches legacy 74LS245 layouts for drop-in replacement. |
| Test Equipment Signal Routing | Modular Data Acquisition Chassis |
Use Scenario: Dynamically reconfiguring signal paths between DUT connectors and measurement instruments in automated test racks. IC Role / Device Role / Timing Role: Reversible bus switch enabling instrument-to-DUT or DUT-to-instrument data flow via DIR control. Use Value: 64 mA drive sinks scope probe capacitance; 3-state isolation prevents crosstalk when multiple instruments share common bus lines. | Use Scenario: Interfacing sensor front-end modules (ADC, signal conditioning) to a central controller in a modular DAQ chassis. IC Role / Device Role / Timing Role: Buffered bidirectional data channel carrying configuration commands and sampled data between slots. Use Value: –40 °C to +85 °C rating ensures reliability in uncooled enclosures; low 50 μA ICC supports low-power sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245N | DIP20 package; no IOFF; higher ICC (250 μA typical) | Not suitable for partial power-down or hot-swap systems | Select only for through-hole prototyping where IOFF is unnecessary. |
| 74LVC245APW | 3.3 V only (1.65–3.6 V); lower drive (±24 mA); no IOFF | Requires level-shifting for 5 V bus integration | Choose only for mixed-voltage 3.3 V subsystems with no 5 V legacy interface. |
Compared with SN74ABT245N and 74LVC245APW, the 74ABT245DB,118 uniquely combines 5 V operation, IOFF protection, and SO20 footprint-making it the sole option for industrial hot-plug-capable 5 V bus isolation without redesign.
Availability
74ABT245DB,118 is available at Aetrix Electronics and suitable for industrial backplane isolation, legacy system bus extension, and modular data acquisition chassis requiring stable component supply over extended product lifecycles.
Supply support for 74ABT245DB,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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in industrial and automotive markets.
The 74ABT series targets high-speed, robust 5 V digital interfaces-designed specifically for noise-immune bus bridging, hot-swap infrastructure, and legacy system modernization where signal integrity and power sequencing resilience are critical.
FAQ
What is the function of the DIR pin on the 74ABT245DB,118?
The DIR (direction) pin is a logic-level control input that determines data flow direction between the A-side (pins 2–9) and B-side (pins 11–18) ports. When DIR = HIGH, data passes from A to B; when DIR = LOW, data flows from B to A. It operates independently of OE and remains functional even during 3-state mode.
Does the 74ABT245DB,118 support hot-plug operation?
Yes-its IOFF circuitry actively disables outputs and limits leakage to ±100 μA when VCC = 0 V, preventing damaging back-current during live insertion or extraction. This, combined with 3-state control via OE, makes it certified for hot-swap applications in modular chassis and industrial backplanes.
Can the 74ABT245DB,118 interface directly with 3.3 V logic?
No-it is specified only for 4.5–5.5 V operation and features TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Direct connection to 3.3 V logic risks marginal VIH recognition and violates recommended operating conditions; a level translator such as TXB0108 is required for reliable 3.3 V ↔ 5 V interfacing.
What is the maximum capacitive load the 74ABT245DB,118 can drive reliably?
The device is characterized for 50 pF load capacitance in dynamic testing (Table 9), with tPLH/tPHL ≤ 4.6 ns at VCC = 5.0 V. Its +64 mA sink capability supports heavier loads, but signal integrity degrades beyond 50 pF without impedance-matched termination-designers should limit trace+load capacitance to ≤50 pF for guaranteed timing compliance.
74ABT245DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74ABT245DB,118 FAQ
1.How can I place an order for 74ABT245DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT245DB,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 74ABT245DB,118 reliable?
The price and inventory of 74ABT245DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT245DB,118 is usually 5 days.
3.What payment methods are accepted for 74ABT245DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT245DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT245DB,118?
74ABT245DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT245DB,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 74ABT245DB,118?
For technical support, including 74ABT245DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT245DB,118 requirements.
6.How does Aetrix verify that 74ABT245DB,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT245DB,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 74ABT245DB,118 meets industry standards.
7.What is the process for return or replacement of 74ABT245DB,118?
All 74ABT245DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT245DB,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 74ABT245DB,118 part is unused and in its original packaging.
Return procedure for 74ABT245DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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