My Inquiry
My Account
Texas Instruments 74ACT11640DW
- Part No.:
- 74ACT11640DW
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
74ACT11640DW.pdf
- Description:
- BUS TRANSCEIVER
- Quantity:
- Payment:
- Shipping:
Inventory:306
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74ACT11640DW from Texas Instruments is an octal bidirectional bus transceiver in a 24-pin SOIC (DW) package, designed for asynchronous two-way data transfer between A and B buses. It features TTL-compatible inputs, ±24 mA output drive, 5.5 V absolute max supply, and operates from −40°C to 85°C. Used in backplane interconnects and legacy industrial control systems requiring flow-through pinout.
For engineers reviewing the 74ACT11640DW datasheet, 74ACT11640DW pinout, 74ACT11640DW application, or 74ACT11640DW equivalent, key selection criteria include direction-control logic behavior, isolation capability during disable, high-speed switching noise suppression via center-pin VCC/GND, and EPIC-process latch-up immunity.
Technical Context
This device implements dual 8-bit bidirectional data paths controlled by separate DIR (direction) and G (enable) inputs. Logic operation follows a three-state flow-through architecture: when G = L, data propagates from A→B if DIR = L, or B→A if DIR = H; when G = H, both A and B ports enter high-impedance state.
It uses Texas Instruments' EPIC 1-µm CMOS process with TTL-voltage-compatible input thresholds (VIL = 0.8 V, VIH = 2 V), 5 V nominal supply, and supports up to 10.5 ns propagation delay (tPLH/tPHL) at 25°C. Center-placed VCC and GND pins reduce simultaneous switching noise in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS systems and margin against rail droop. |
| Output Drive | ±24 mA - sufficient to drive 50 Ω transmission lines or multiple TTL loads without external buffers. |
| Propagation Delay | 1.5–10.5 ns - enables reliable operation in sub-100 MHz synchronous bus environments. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - guarantees interoperability with legacy TTL outputs and robust noise margins. |
| Isolation Leakage | ±5 µA (IOZ) - maintains bus integrity during disable mode with negligible DC loading on either side. |
| Latch-Up Immunity | 500 mA typical at 125°C - meets stringent reliability requirements for industrial temperature cycling. |
Pinout & Package
74ACT11640DW is housed in a 24-pin plastic small-outline integrated circuit (SOIC) package with 300-mil width and standard DW footprint. Pin 1 is located at the top-left corner (notch or mark side), with center-aligned VCC (pins 13, 14) and GND (pins 5, 6, 7, 8, 19, 20, 21, 22) for low-noise power distribution.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | A-side data I/O | Octal bidirectional port connected to local bus; driven or sensed depending on DIR/G state. |
| B1–B8 | B-side data I/O | Octal bidirectional port connected to remote bus; mirrors A-side activity under active control. |
| DIR | Direction control input | Active-High signal selecting B→A (DIR = H) or A→B (DIR = L) data flow when G = L. |
| G | Output enable input | Active-Low global enable; G = H forces all A/B pins into high-Z isolation state. |
| VCC (pins 13, 14) | Power supply | Center-placed dual VCC pins minimize IR drop and improve high-frequency decoupling effectiveness. |
| GND (pins 5, 6, 7, 8, 19, 20, 21, 22) | Ground reference | Eight dedicated GND pins distributed across package centerline suppress ground bounce and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Linear A1–A8 → B1–B8 pin mapping simplifies PCB routing and eliminates layer jumps in dense backplanes. |
| Center-pin VCC/GND | Reduces simultaneous switching noise by >6 dB compared to edge-fed packages in multi-transceiver layouts. |
| TTL-voltage compatible inputs | Accepts standard 5 V TTL logic levels without level-shifting, enabling direct interface with legacy controllers. |
| EPIC 1-µm CMOS process | Delivers 10× lower static power than bipolar equivalents while maintaining 74ACT speed-grade performance. |
| 500 mA latch-up immunity | Withstands transient overcurrent events common in hot-swap or ESD-prone industrial environments. |
Applications
| Industrial Backplane Interconnect | Legacy System Bus Extension |
|---|---|
Use Scenario: Connecting CPU and peripheral modules across a 16-layer industrial backplane with 10+ transceivers per segment. IC Role / Device Role / Timing Role: Bidirectional data bridge isolating A-bus (CPU side) and B-bus (I/O side) with direction arbitration via system controller. Use Value: Flow-through pinout reduces trace length mismatch by 40%, minimizing skew-induced timing violations at 25 MHz. |
Use Scenario: Extending a 1980s-era VMEbus subsystem with new I/O cards while preserving original timing budgets. IC Role / Device Role / Timing Role: Level-translating and buffering interface between TTL-based master and CMOS-based slave devices. Use Value: TTL-compatible inputs eliminate need for external translators; ±24 mA drive sustains signal integrity over 30 cm ribbon cables. |
| Programmable Logic Interface | Test Equipment Data Path |
Use Scenario: Coupling FPGA I/O banks to external memory or ADC/DAC interfaces in reconfigurable instrumentation. IC Role / Device Role / Timing Role: Direction-controlled data conduit synchronized to FPGA clock domain using DIR as register-controlled signal. Use Value: 10.5 ns max tPLH allows setup/hold compliance with 50 MHz FPGA I/O clocks without added pipeline stages. |
Use Scenario: High-reliability data capture in automated test equipment where bus contention must be avoided during self-test sequences. IC Role / Device Role / Timing Role: Isolating DUT bus from tester logic during calibration using G input as safety interlock. Use Value: <1 µA IOZ leakage prevents false triggering during high-impedance monitoring phases of test routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT245DW | Octal non-inverting transceiver with single-direction control (OE only); no DIR pin; identical SOIC-24 package and 5 V specs. | Requires external logic to manage direction; suitable only when bus protocol mandates fixed A→B or B→A flow. | Select 74ACT245DW if direction is statically assigned and board space permits discrete XOR logic for DIR generation. |
| SN74LVC8T245RHLR | 3.3 V tolerant, dual-supply (1.65–5.5 V), 24-pin VQFN; supports voltage translation; higher speed (tPD = 3.8 ns typ). | Enables mixed-voltage systems (e.g., 3.3 V FPGA ↔ 5 V legacy peripherals); not pin-compatible with 74ACT11640DW. | Choose SN74LVC8T245RHLR for new designs requiring level shifting or lower power; requires PCB redesign due to QFN footprint. |
Compared with 74ACT11640DW, 74ACT245DW lacks direction control but offers identical drive strength and package; SN74LVC8T245RHLR adds voltage translation and speed at the cost of layout incompatibility and reduced latch-up immunity.
Availability
74ACT11640DW is available at Aetrix Electronics and suitable for industrial backplane interconnects, legacy system bus extensions, and programmable logic interface applications requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT11640DW 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74ACT11640DW belongs to TI's advanced CMOS (ACT) logic family, engineered for high-speed, low-noise bidirectional bus interfacing in mission-critical industrial and military-grade systems.
FAQ
What is the operating temperature range for the 74ACT11640DW?
The 74ACT11640DW is characterized for operation from −40°C to +85°C. This commercial-grade temperature specification aligns with standard industrial ambient requirements and is validated per TI's SCAS027A datasheet revision April 1993. The 74ACT11640DW does not support extended military ranges - that functionality is reserved for the 54ACT11640 variant.
Does the 74ACT11640DW support 3.3 V logic levels on its inputs?
No, the 74ACT11640DW inputs are TTL-voltage compatible (VIL = 0.8 V, VIH = 2.0 V), optimized for 5 V systems. While it may function with 3.3 V inputs in some cases, TI does not guarantee switching behavior or noise margins below 2.0 V VIH. For guaranteed 3.3 V interface, use the 74LVC8T245 instead of the 74ACT11640DW.
How many GND pins does the 74ACT11640DW package have, and why are they distributed centrally?
The 74ACT11640DW SOIC package has eight dedicated GND pins (pins 5, 6, 7, 8, 19, 20, 21, 22), symmetrically placed around the centerline. This layout minimizes ground loop inductance and suppresses simultaneous switching noise - a key design feature documented in the SCAS027A datasheet to support clean signal integrity in high-density bus applications using the 74ACT11640DW.
Can the 74ACT11640DW be used as a unidirectional buffer?
Yes - the 74ACT11640DW can operate unidirectionally by holding DIR constant (e.g., DIR = L for A→B only) while toggling G to enable/disable. Its internal architecture supports this mode without degradation; however, unlike dedicated unidirectional buffers, it retains bidirectional capability and pinout, making it ideal for flexible bus architectures where future upgrades may require reverse flow - a core use case for the 74ACT11640DW.
What is the maximum recommended load capacitance for the 74ACT11640DW outputs?
The 74ACT11640DW is characterized with CL = 50 pF in switching tests (Figure 1, SCAS027A), and its typical power dissipation capacitance is 45 pF when enabled. TI recommends limiting total capacitive load per output to ≤50 pF to maintain specified propagation delays and edge rates. Exceeding this value increases tPLH/tPHL and may cause timing violations in systems relying on the published 10.5 ns max delay of the 74ACT11640DW.
74ACT11640DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74ACT11640DW FAQ
1.How can I place an order for 74ACT11640DW through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11640DW 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 74ACT11640DW reliable?
The price and inventory of 74ACT11640DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11640DW is usually 5 days.
3.What payment methods are accepted for 74ACT11640DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11640DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11640DW?
74ACT11640DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11640DW 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 74ACT11640DW?
For technical support, including 74ACT11640DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11640DW requirements.
6.How does Aetrix verify that 74ACT11640DW is sourced from the original manufacturer or authorized distributors?
All 74ACT11640DW 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 74ACT11640DW meets industry standards.
7.What is the process for return or replacement of 74ACT11640DW?
All 74ACT11640DW units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11640DW, 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 74ACT11640DW part is unused and in its original packaging.
Return procedure for 74ACT11640DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ACT11640DW 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…
