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Texas Instruments CD74AC623M96E4
- Part No.:
- CD74AC623M96E4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74AC623M96E4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,103
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Product details
Overview
CD74AC623M96E4 from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for bidirectional data transmission in TTL/CMOS mixed-signal systems. It features ±24mA output drive, 5.5ns typical propagation delay at VCC = 5V, and operates across −55°C to +125°C. It is used in industrial control backplanes and legacy instrumentation data buses.
For engineers reviewing the CD74AC623M96E4 datasheet, CD74AC623M96E4 pinout, CD74AC623M96E4 application, or CD74AC623M96E4 equivalent, key selection criteria include its 20-pin SOIC (DW) package, 3-state enable logic polarity, bus-hold capability absence, and compatibility with AC-level input thresholds in high-noise environments.
Technical Context
The CD74AC623M96E4 implements dual 4-bit non-inverting transceivers with separate transmit/receive direction control via two active-low OE inputs (1OE, 2OE) and one active-high DIR input per port. Each port supports independent 3-state output control, enabling bidirectional data flow without external logic inversion.
It uses advanced CMOS (AC) technology with Schmitt-trigger inputs on control pins only - not on data I/O - and exhibits rail-to-rail output swing with TTL-compatible input thresholds (VIH = 3.5V min, VIL = 1.5V max at VCC = 5V). No internal bus-hold or power-down circuitry is integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - supports mixed-voltage system interfacing between 3.3V and 5V domains |
| Propagation Delay | 5.5ns typ @ VCC = 5V - enables reliable operation up to ~100MHz bus toggle rates |
| Output Drive | ±24mA - sufficient to drive 50Ω transmission lines or 10+ TTL loads directly |
| Input Thresholds | VIH = 3.5V min, VIL = 1.5V max @ VCC = 5V - ensures robust noise margin vs. TTL logic levels |
| Operating Temp | −55°C to +125°C - qualified for extended industrial/military applications without derating |
| IOH/IOL | −24mA / +24mA @ VCC = 5V - symmetric sourcing/sinking eliminates need for external pull-ups in open-drain emulation |
Pinout & Package
CD74AC623M96E4 is housed in a 20-lead SOIC package (DW suffix), 7.5mm wide, 12.8mm long, 2.65mm max height, with 1.27mm pitch and RoHS-compliant NiPdAu lead finish. Moisture sensitivity level is Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1OE) | Active-low Output Enable A | Disables all outputs of Port A when high; required for tristate isolation during bus arbitration |
| 2–5 (A0–A3) | Data Inputs/Outputs A | Bidirectional I/O pins for first 4-bit port; direction set by DIR1 and 1OE state |
| 6 (DIR1) | Direction Control A | High = A→B transmit; Low = B→A receive - determines data flow direction per port |
| 7–10 (B0–B3) | Data Inputs/Outputs B | Bidirectional I/O pins for second 4-bit port; driven only when corresponding OE is low |
| 11 (GND) | Ground Reference | Primary return path for all digital signals and output current sinks |
| 12–15 (B4–B7) | Data Inputs/Outputs B | Upper nibble of Port B; electrically identical to B0–B3 but mapped to different byte lanes |
| 16 (DIR2) | Direction Control B | Independent direction control for Port B - allows simultaneous A↔B and C↔D-like operation in multi-port systems |
| 17–20 (A4–A7) | Data Inputs/Outputs A | Upper nibble of Port A; shares same 1OE and DIR1 controls as A0–A3 |
| 20 (VCC) | Power Supply | Single 2V–6V supply; no separate logic/power rails - simplifies PCB routing |
Key Features
| Feature | Design Value |
|---|---|
| Dual 4-bit bidirectional ports | Enables independent control of two 4-bit data paths - reduces component count vs. discrete transceivers |
| Separate DIR and OE per port | Allows asynchronous direction switching and output disable - critical for hot-swap and dynamic bus reconfiguration |
| TTL-compatible input thresholds | Eliminates need for level-shifting when interfacing with legacy 5V microcontrollers or FPGAs |
| ±24mA output drive strength | Drives unterminated 50Ω traces or multiple TTL inputs without external buffers - lowers BOM cost |
| Extended temperature range | Operates reliably in engine control units, avionics enclosures, and downhole instrumentation without thermal derating |
Applications
| Industrial Backplane Interface | Legacy Instrumentation Bus |
|---|---|
Use Scenario: Interfacing modular PLC I/O cards to a central controller over a 20cm parallel bus running at 20MHz. IC Role / Device Role / Timing Role: Bidirectional data transceiver managing read/write cycles between master and slave modules with precise timing control. Use Value: 5.5ns propagation delay ensures setup/hold margins are maintained across full temperature range without added wait states. | Use Scenario: Replacing failed transceivers in aging oscilloscope mainframe data acquisition subsystems. IC Role / Device Role / Timing Role: Level-shifting and bus isolation component bridging 5V TTL logic and newer 3.3V FPGA-based processing boards. Use Value: TTL-compatible VIH/VIL thresholds guarantee interoperability with original design schematics without redesign. |
| Military Data Link Adapter | Automated Test Equipment (ATE) |
Use Scenario: Signal conditioning in a MIL-STD-1553B auxiliary interface module operating in −40°C to +85°C environmental chambers. IC Role / Device Role / Timing Role: Isolating and buffering command/data words between host processor and remote terminal interface ICs. Use Value: −55°C to +125°C rating validates operation beyond spec limits - supports qualification testing at extreme corners. | Use Scenario: High-speed digital pattern generation in semiconductor test handlers requiring repeatable 100k-cycle reliability. IC Role / Device Role / Timing Role: Driving parallel stimulus vectors onto DUT pins while maintaining signal integrity under heavy capacitive loading. Use Value: ±24mA drive sustains <1V undershoot on 15pF loads - meets JEDEC JESD8-12A waveform fidelity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT623N | Same AC logic family, but PDIP-20 package; no tape-and-reel option; identical electrical specs | Preferred for prototyping or low-volume manual assembly where SOIC reflow is impractical | Select SN74ACT623N when hand-soldering or socket-based validation is required |
| CD74HC623M96 | HC family: lower drive (±7.8mA), slower (20ns delay), wider VCC range (2–6V), same pinout | Suitable for battery-powered or low-power systems where speed and drive are secondary to quiescent current | Choose CD74HC623M96 only if <1µA ICCQ and reduced EMI are prioritized over timing performance |
Compared with SN74ACT623N and CD74HC623M96, CD74AC623M96E4 delivers optimal balance of speed, drive strength, and SOIC tape-and-reel manufacturability - making it the preferred choice for high-volume industrial PCB assembly where signal integrity and thermal robustness are critical.
Availability
CD74AC623M96E4 is available at Aetrix Electronics and suitable for industrial backplanes, military data adapters, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74AC623M96E4 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
CD74AC623M96E4 belongs to TI's legacy AC logic family, engineered for high-speed, noise-immune digital interfacing in harsh-environment systems where reliability across extreme temperatures is mandatory.
FAQ
What is the maximum clock frequency supported by CD74AC623M96E4 in a bidirectional bus configuration?
The CD74AC623M96E4 does not operate on a clock signal - it is an asynchronous transceiver. Its usable data rate depends on propagation delay (5.5ns typ) and system timing margins. In practice, it reliably supports bidirectional bus toggle rates up to 100MHz in well-terminated 5V systems with controlled trace impedance and minimal stub length.
Does CD74AC623M96E4 include bus-hold or weak pull-up circuitry on its I/O pins?
No, CD74AC623M96E4 does not integrate bus-hold or weak pull-up circuitry. All data I/O pins are standard CMOS drivers with no internal termination. External pull-up or pull-down resistors must be used where floating-state prevention is required during 3-state conditions.
Can CD74AC623M96E4 operate at 3.3V supply voltage while interfacing with 5V TTL devices?
Yes, CD74AC623M96E4 operates from 2V to 6V, and its input thresholds (VIH = 0.7×VCC, VIL = 0.3×VCC) scale with supply. At VCC = 3.3V, VIH ≈ 2.3V - sufficient to recognize 5V TTL outputs as valid high. However, its 3.3V outputs may not meet 5V TTL VIH minimums; level-shifting is recommended for reliable 3.3V→5V driving.
What is the meaning of the "M96" suffix in CD74AC623M96E4?
The "M96" suffix in CD74AC623M96E4 indicates a 20-lead SOIC (DW) package supplied in tape-and-reel format with 2000 units per reel. The "E4" denotes TI's internal revision code and packaging variant - confirming RoHS compliance and NIPDAU lead finish per TI's 2026 packaging addendum.
Is CD74AC623M96E4 pin-compatible with CD74ACT623M96?
Yes, CD74AC623M96E4 is pin-compatible with CD74ACT623M96. Both share identical SOIC-20 (DW) footprint, pin numbering, and functional pin assignments. The difference lies in logic family: AC uses lower power and slightly slower speed than ACT, but both maintain the same DC characteristics and timing architecture.
CD74AC623M96E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74AC623M96E4 FAQ
1.How can I place an order for CD74AC623M96E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC623M96E4 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 CD74AC623M96E4 reliable?
The price and inventory of CD74AC623M96E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC623M96E4 is usually 5 days.
3.What payment methods are accepted for CD74AC623M96E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC623M96E4 transactions.
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4.How is shipping managed for CD74AC623M96E4?
CD74AC623M96E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC623M96E4 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 CD74AC623M96E4?
For technical support, including CD74AC623M96E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC623M96E4 requirements.
6.How does Aetrix verify that CD74AC623M96E4 is sourced from the original manufacturer or authorized distributors?
All CD74AC623M96E4 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 CD74AC623M96E4 meets industry standards.
7.What is the process for return or replacement of CD74AC623M96E4?
All CD74AC623M96E4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC623M96E4, 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 CD74AC623M96E4 part is unused and in its original packaging.
Return procedure for CD74AC623M96E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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