My Inquiry
My Account
Texas Instruments 74ACT11245PWR
- Part No.:
- 74ACT11245PWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ACT11245PWR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,513
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74ACT11245PWR 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 TTL-voltage-compatible systems. It features direction control (DIR), output enable (OE), ±24 mA drive strength, 5 V supply operation, and operates from –40°C to 85°C - used in backplane interface and legacy system bus isolation.
For engineers reviewing the 74ACT11245PWR datasheet, 74ACT11245PWR pinout, 74ACT11245PWR application, or 74ACT11245PWR equivalent, key selection criteria include bidirectional flow-through architecture, 3-state bus isolation timing (tPLZ/tPHZ ≤ 13.9 ns), TSSOP-24 package compatibility, and EPIC CMOS process latch-up immunity (500 mA at 125°C).
Technical Context
The 74ACT11245PWR implements dual 8-bit bidirectional data paths controlled by a single DIR input and shared OE signal, enabling either A→B or B→A transmission while maintaining high-speed isolation during disable. Its flow-through pinout minimizes PCB trace crossovers and reduces signal skew.
It uses Texas Instruments' EPIC (Enhanced-Performance Implanted CMOS) 1-μm process, delivering TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V), rail-to-rail output swing, and robust noise margins. Center-placed VCC and GND pins suppress simultaneous switching noise in high-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V logic rails and tolerates power supply ripple. |
| Drive Strength | ±24 mA per output - supports direct connection to standard TTL/CMOS loads without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 10 ns - enables reliable operation in 50 MHz–100 MHz bus systems with tight timing budgets. |
| 3-State Enable/Disable Time | tPZH/tPLZ ≤ 13.9 ns - guarantees fast bus release and prevents contention during direction switching. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
| Input Compatibility | TTL-voltage compatible (VIH = 2.0 V, VIL = 0.8 V) - interfaces directly with legacy 74LS/74F logic without level shifters. |
| Latch-Up Immunity | 500 mA typical at 125°C - meets stringent JEDEC JESD78 requirements for robustness in noisy environments. |
Pinout & Package
TSSOP-24 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant green finish, moisture sensitivity level 1 (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Input/Output port A | 8-bit bidirectional data bus side A; driven when DIR = H and OE = L (A→B) or DIR = L and OE = L (B→A). |
| B1–B8 | Input/Output port B | 8-bit bidirectional data bus side B; complementary to A port with direction determined by DIR state. |
| DIR | Direction control input | Active-High logic: DIR = H enables A→B transfer; DIR = L enables B→A transfer. |
| OE | Output enable input | Active-Low logic: OE = L enables transceiver; OE = H places both A and B ports in high-impedance state. |
| VCC | Power supply | 5 V supply pin; two center-placed VCC pins (pins 13 & 24) reduce IR drop and switching noise. |
| GND | Ground reference | Four dedicated GND pins (pins 5, 6, 7, 8) provide low-inductance return paths for all I/Os. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Minimizes PCB trace length and layer transitions - reduces signal integrity degradation and EMI in dense routing. |
| Center-placed VCC/GND | Dual VCC (pins 13, 24) and quad GND (pins 5–8) lower power delivery impedance and suppress ground bounce. |
| EPIC CMOS process | Enables TTL-compatible inputs with CMOS power efficiency - ICC < 80 μA static, 66 pF power dissipation capacitance. |
| 3-state bus isolation | Guaranteed high-impedance output leakage ≤ ±5 μA - prevents bus contention during hot-swap or power sequencing. |
| High latch-up immunity | 500 mA typical at 125°C - eliminates need for external current-limiting protection in harsh thermal environments. |
Applications
| Industrial Backplane Interface | Legacy System Bus Isolation |
|---|---|
Use Scenario: Isolating CPU and peripheral modules on a 24-bit ISA-style backplane where multiple masters share address/data lines. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between processor and expansion cards under software-controlled DIR/OE timing. Use Value: Flow-through layout allows straight-line routing across backplane connectors, reducing skew and improving timing margin by >1.5 ns. | Use Scenario: Interfacing FPGA-based controller with aging 74LS-based I/O subsystems requiring voltage-level and timing compatibility. IC Role / Device Role / Timing Role: Level-shifting and bus-driving transceiver translating between 3.3 V FPGA I/O and 5 V TTL peripherals. Use Value: TTL-compatible inputs eliminate external pull-ups; ±24 mA drive ensures full fanout to 10 LS loads without buffering. |
| Modular Test Equipment Data Path | Automated Test Fixture Control |
Use Scenario: Configurable data path in PXI or VXI slot-card architecture where DUT communication direction changes dynamically during test sequences. IC Role / Device Role / Timing Role: Reversible data conduit synchronized to test pattern generator clocks via DIR and OE strobes. Use Value: tPLZ ≤ 13.9 ns enables sub-100 ns bus turnaround - critical for high-throughput parametric testing at 10+ MHz rates. | Use Scenario: Controlling multiple sensor acquisition channels on a single PCB where analog front-end and digital processing sections require electrical isolation. IC Role / Device Role / Timing Role: Signal-direction arbitrator isolating ADC result bus from microcontroller during conversion cycles. Use Value: High-impedance state leakage ≤ ±5 μA prevents loading of sensitive analog reference nodes during sampling windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT245DBR | Same function, identical AC/DC specs, but DB package has different thermal resistance (θJA = 108°C/W vs PW's 120°C/W) and slightly higher ICC. | Preferred for SSOP-24 footprint compatibility; not pin-to-pin with TSSOP-24 due to body width and lead form differences. | Select when existing board uses SSOP-24 land pattern or requires marginally better thermal performance. |
| 74LVC245APW | Lower voltage (1.65–3.6 V), smaller drive (±24 mA only at 3.3 V), and faster propagation (tPD ≈ 4.2 ns), but lacks TTL input compatibility. | Suitable for modern 3.3 V-only systems; incompatible with 5 V buses or legacy TTL inputs without level translation. | Choose only for new 3.3 V designs where power efficiency and speed outweigh backward compatibility needs. |
Compared with SN74ACT245DBR, the 74ACT11245PWR offers identical logic behavior but optimized TSSOP-24 footprint for space-constrained layouts; versus 74LVC245APW, it retains full 5 V TTL interoperability at the cost of higher static current and slightly slower timing - making it the sole choice for mixed-voltage or legacy-replacement use cases.
Availability
74ACT11245PWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus isolation, modular test equipment data paths, automated test fixture control, and FPGA-to-TTL bridging requiring stable component supply over extended production lifecycles.
Supply support for 74ACT11245PWR 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 decades of heritage in industry-standard logic families.
The 74ACT11245PWR belongs to TI's advanced CMOS (ACT) logic portfolio, engineered specifically for high-noise-immunity, 5 V system interfacing where reliability, timing predictability, and backward compatibility are critical.
FAQ
What is the maximum operating temperature range for the 74ACT11245PWR?
The 74ACT11245PWR is characterized for operation from –40°C to +85°C, meeting industrial temperature grade requirements. This range is validated across all electrical parameters including propagation delay, output drive, and 3-state leakage, ensuring consistent performance in factory automation, test equipment, and outdoor-rated electronics where ambient conditions vary widely. The 74ACT11245PWR maintains specified timing and drive strength throughout this full range.
Does the 74ACT11245PWR support true bidirectional data flow without external logic?
Yes, the 74ACT11245PWR supports true bidirectional data flow using only its DIR and OE inputs - no external gates or controllers needed. When OE is low, asserting DIR = H enables A→B transfer; DIR = L enables B→A transfer. Both directions operate with matched propagation delays (tPLH/tPHL ≤ 10 ns), and the device enters high-impedance isolation on either port when OE is high. This native dual-direction capability is intrinsic to the 74ACT11245PWR design.
Is the 74ACT11245PWR pin-compatible with other 74ACT245 variants?
No - the 74ACT11245PWR is not pin-compatible with standard 74ACT245 packages such as SOIC (DW) or PDIP (NT). While functionally identical, its TSSOP-24 (PW) footprint has different pad pitch (0.65 mm), body width (4.4 mm), and pin 1 location. Substitution requires PCB layout revision. The 74ACT11245PWR shares logic behavior and timing with SN74ACT245DBR but differs mechanically - confirming that pin compatibility must be verified per package drawing, not part number prefix.
What is the purpose of the multiple GND pins on the 74ACT11245PWR?
The 74ACT11245PWR includes four dedicated GND pins (pins 5–8) to minimize ground inductance and suppress simultaneous switching noise in high-speed bus applications. This configuration provides low-impedance return paths for all 16 I/Os and internal logic, reducing ground bounce by up to 40% compared to single-GND alternatives. The placement supports symmetrical current distribution - a design feature confirmed in TI's EPIC process layout guidelines and essential for maintaining signal integrity in the 74ACT11245PWR's 10 ns timing window.
Can the 74ACT11245PWR interface directly with 3.3 V logic devices?
The 74ACT11245PWR is not guaranteed to interface safely with 3.3 V logic without level translation. Its inputs are TTL-compatible (VIH = 2.0 V min), so 3.3 V outputs may register correctly, but its 5 V outputs exceed 3.3 V absolute maximum ratings of most 3.3 V devices. Driving a 3.3 V input directly risks damage or accelerated wear. For mixed-voltage systems, the 74ACT11245PWR should be paired with bus switches or level translators - a constraint explicitly documented in TI's application notes for the 74ACT11245PWR family.
74ACT11245PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 24-TSSOP (0.173", 4.40mm 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:
- 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-TSSOP
74ACT11245PWR FAQ
1.How can I place an order for 74ACT11245PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11245PWR 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 74ACT11245PWR reliable?
The price and inventory of 74ACT11245PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11245PWR is usually 5 days.
3.What payment methods are accepted for 74ACT11245PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11245PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11245PWR?
74ACT11245PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11245PWR 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 74ACT11245PWR?
For technical support, including 74ACT11245PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11245PWR requirements.
6.How does Aetrix verify that 74ACT11245PWR is sourced from the original manufacturer or authorized distributors?
All 74ACT11245PWR 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 74ACT11245PWR meets industry standards.
7.What is the process for return or replacement of 74ACT11245PWR?
All 74ACT11245PWR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11245PWR, 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 74ACT11245PWR part is unused and in its original packaging.
Return procedure for 74ACT11245PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ACT11245PWR 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…
