My Inquiry
My Account
Texas Instruments 74ACT11245DW
- Part No.:
- 74ACT11245DW
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT11245DW.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74ACT11245DW from Texas Instruments is an octal bus transceiver IC with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in industrial control and embedded computing systems. It operates from –40°C to 85°C, supports 4.5 V to 5.5 V supply, delivers ±24 mA output drive, and features flow-through pinout for optimized PCB layout.
For engineers reviewing the 74ACT11245DW datasheet, 74ACT11245DW pinout, 74ACT11245DW application, or 74ACT11245DW equivalent, this page provides verified functional role, timing characteristics (tPLH/tPHL ≤ 10 ns), 3-state isolation behavior, and package-specific thermal and layout guidance for SOIC-24 implementation.
Technical Context
The 74ACT11245DW implements dual-directional bus communication via DIR-controlled signal path selection (A→B or B→A) and OE-gated 3-state output enable/disable. Its EPIC (Enhanced-Performance Implanted CMOS) 1-µm process ensures TTL-voltage-compatible inputs and rail-to-rail output swing under load.
Center-pin VCC and GND placement minimizes high-speed switching noise, while flow-through architecture aligns input and output pins on opposite sides of the SOIC-24 package to reduce trace crossovers and signal integrity degradation in dense digital backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5 V logic systems and margin against rail droop in noisy environments. |
| Output Drive | ±24 mA - Sufficient to drive standard TTL loads and multiple CMOS inputs without external buffering. |
| Propagation Delay | tPLH/tPHL ≤ 10 ns - Enables reliable operation in 50 MHz–100 MHz bus clock domains with timing margin. |
| 3-State Leakage | ±0.5 µA max - Guarantees high-impedance isolation between buses during disable, preventing contention or leakage-induced logic errors. |
| Operating Temperature | –40°C to 85°C - Qualified for industrial-grade deployment in programmable logic controllers and motor drive interfaces. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - Directly interfaces with legacy 74LS/74F families without level-shifting circuitry. |
| Power Dissipation | 1.7 W max (DW package at TA = 55°C) - Requires minimal heatsinking in typical board-level airflow conditions. |
Pinout & Package
74ACT11245DW uses a 24-pin SOIC (DW) package with 300-mil width, JEDEC MS-013 compliant outline, and center-aligned power/ground pins (pins 10–11 VCC, pins 12–13 GND) to suppress simultaneous switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Input/Output port A | Unidirectional data terminals for A-bus side; driven by internal transceiver when DIR/OE enable A→B path. |
| B1–B8 | Input/Output port B | Unidirectional data terminals for B-bus side; driven when DIR/OE enable B→A path; isolated otherwise. |
| DIR | Direction control | Active-High logic selects B→A data flow; Active-Low selects A→B flow; no internal pull-up/down. |
| OE | Output enable | Active-Low enables 3-state outputs; High forces all A/B pins into high-impedance state for bus isolation. |
| VCC (pins 10,11) | Supply | Dual center VCC pins reduce IR drop and improve decoupling effectiveness across wide SOIC body. |
| GND (pins 12,13) | Reference | Dual center GND pins provide low-inductance return path and minimize ground bounce during switching. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins placed on opposite package edges to eliminate layer crossovers and reduce trace length in bus routing. |
| Center-pin VCC/GND | Paired VCC (pins 10–11) and GND (pins 12–13) minimize power delivery loop inductance and suppress simultaneous switching noise. |
| EPIC CMOS process | 1-µm implanted CMOS delivers TTL-compatible input thresholds and 500 mA latch-up immunity at 125°C for robust field operation. |
| 3-state output control | Independent OE input disables both A and B ports simultaneously, enabling clean bus arbitration in multi-master systems. |
| Wide temperature range | –40°C to +85°C qualification supports deployment in industrial enclosures without forced cooling or derating. |
Applications
| Industrial PLC Backplane | Embedded CPU Memory Interface |
|---|---|
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion cards in modular programmable logic controllers. IC Role / Device Role / Timing Role: Bus transceiver isolating address/data lines between modules while supporting hot-swap arbitration via OE control. Use Value: Flow-through pinout reduces PCB layer count; ±24 mA drive sustains signal integrity across 15 cm backplane traces at 25 MHz. | Use Scenario: Interfacing microcontroller local bus to external SRAM or flash memory in space-constrained edge devices. IC Role / Device Role / Timing Role: Direction-controlled data path between MCU D[7:0] and memory DQ[7:0], synchronized to WR/RD strobes. Use Value: tPLH ≤ 10 ns enables 50 MHz memory access cycles; 3-state isolation prevents bus contention during DMA transfers. |
| Test Equipment Digital I/O Card | Legacy System Bus Bridge |
Use Scenario: Signal conditioning and level translation between FPGA-based test pattern generator and DUT interface connectors. IC Role / Device Role / Timing Role: Bidirectional buffer translating between 3.3 V FPGA I/O and 5 V DUT logic, with DIR selecting stimulus vs. response direction. Use Value: TTL-compatible inputs accept 5 V signals directly; ±24 mA drive ensures fast edge rates into 50 Ω scope probes or cable loads. | Use Scenario: Connecting modern microcontroller peripherals to legacy ISA or VME bus segments in retro-computing or avionics upgrade kits. IC Role / Device Role / Timing Role: Protocol-agnostic bus repeater enabling voltage and timing domain bridging between new and old subsystems. Use Value: OE-controlled isolation allows safe insertion/removal of legacy cards; -40°C to 85°C rating matches aerospace environmental specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT245DW | Same pinout, identical electrical specs, but lacks DIR input - uses separate A→B and B→A enable controls (OE1/OE2). | Requires additional control logic for direction management; less suitable for single-wire DIR-driven systems. | Select 74ACT245DW only if existing design uses discrete direction gating or requires independent A/B output control. |
| SN74LVC245APWR | 3.3 V only (1.65–3.6 V), lower drive (±24 mA), smaller TSSOP-24 package, higher speed (tPD ≈ 5.3 ns). | Not voltage-compatible with 5 V buses; requires level shifters when interfacing with legacy 5 V logic. | Choose SN74LVC245APWR for new 3.3 V designs prioritizing size and speed; avoid for mixed-voltage or retrofit applications. |
Compared with 74ACT11245DW, 74ACT245DW offers identical 5 V performance but demands extra control signals, while SN74LVC245APWR enables compact 3.3 V designs at the cost of 5 V interoperability - making 74ACT11245DW the optimal choice for industrial 5 V bus isolation where DIR simplification and legacy compatibility are critical.
Availability
74ACT11245DW is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory interfaces, test equipment I/O cards, and legacy system bus bridges requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ACT11245DW 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 90 years of innovation in industrial, automotive, and communications markets.
The 74ACT11245DW belongs to TI's advanced CMOS logic family, engineered specifically for high-noise industrial environments requiring robust 5 V bus interfacing, precise timing control, and long-term reliability without derating.
FAQ
What is the maximum operating temperature for the 74ACT11245DW?
The 74ACT11245DW is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade specification is validated per TI's SCAS031C datasheet and applies to the SOIC (DW) package variant. Thermal derating is not required within this range, and the device maintains full electrical performance including ±24 mA output drive and ≤10 ns propagation delay across the entire span.
Does the 74ACT11245DW support 3.3 V logic levels?
No, the 74ACT11245DW is a 5 V-only device with recommended supply voltage of 4.5 V to 5.5 V. Its inputs are TTL-voltage compatible (VIH = 2.0 V min, VIL = 0.8 V max), but it does not guarantee correct operation below 4.5 V. For 3.3 V systems, TI recommends alternatives like SN74LVC245APWR - the 74ACT11245DW must be used with level-shifting circuitry if interfacing to 3.3 V logic.
How does the DIR pin function in the 74ACT11245DW?
The DIR pin on the 74ACT11245DW is a direction-control input that determines data flow path: when DIR = Low, data passes from A bus to B bus; when DIR = High, data passes from B bus to A bus. This single-pin control eliminates need for separate A→B and B→A enables. DIR has no internal pull-up or pull-down, so external biasing is required in floating scenarios to prevent undefined state.
What is the purpose of the dual VCC and GND pins on the 74ACT11245DW SOIC package?
The 74ACT11245DW SOIC (DW) package features two VCC pins (10 and 11) and two GND pins (12 and 13) positioned centrally to minimize power delivery loop inductance and suppress simultaneous switching noise. This layout reduces ground bounce and improves signal integrity in high-speed bus applications - a key differentiator from older DIP or single-power-pin SOIC logic devices.
Is the 74ACT11245DW RoHS compliant and lead-free?
Yes, the 74ACT11245DW is RoHS compliant and lead-free, with CU NIPDAU terminal finish and Green (RoHS & no Sb/Br) eco plan designation. It meets JEDEC Level-1 moisture sensitivity rating (MSL-1, 260°C peak reflow) and is qualified for standard Pb-free soldering processes. The part marking "ACT11245" appears on the top surface, consistent with TI's production release documentation dated November 2025.
74ACT11245DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
74ACT11245DW FAQ
1.How can I place an order for 74ACT11245DW through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11245DW 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 74ACT11245DW reliable?
The price and inventory of 74ACT11245DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11245DW is usually 5 days.
3.What payment methods are accepted for 74ACT11245DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11245DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11245DW?
74ACT11245DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11245DW 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 74ACT11245DW?
For technical support, including 74ACT11245DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11245DW requirements.
6.How does Aetrix verify that 74ACT11245DW is sourced from the original manufacturer or authorized distributors?
All 74ACT11245DW 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 74ACT11245DW meets industry standards.
7.What is the process for return or replacement of 74ACT11245DW?
All 74ACT11245DW units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11245DW, 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 74ACT11245DW part is unused and in its original packaging.
Return procedure for 74ACT11245DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ACT11245DW 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…
