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Texas Instruments CD74AC623M96G4
- Part No.:
- CD74AC623M96G4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74AC623M96G4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
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Product details
Overview
CD74AC623M96G4 from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for bidirectional data transmission in TTL-compatible digital systems. It features ±24mA output drive, 7.5ns typical propagation delay at VCC = 5V, and operates across −40°C to +85°C industrial temperature range. It is used in microprocessor address/data bus isolation and memory interface buffering.
For engineers reviewing the CD74AC623M96G4 datasheet, CD74AC623M96G4 pinout, CD74AC623M96G4 application, or CD74AC623M96G4 equivalent, key selection criteria include 3-state control logic (OE\ active-low), symmetric high/low output drive strength, SOIC-20 package compatibility with IPC-7351 land patterns, and AC-series voltage-level tolerance (2V–6V).
Technical Context
The CD74AC623M96G4 implements dual 4-bit non-inverting transceivers with independent transmit/receive direction control via two active-low Output Enable (OE\) inputs. Each 4-bit section has separate Direction (DIR) inputs that determine data flow direction-high enables A-to-B transmission, low enables B-to-A.
It uses advanced CMOS (AC) technology to achieve TTL-compatible input thresholds while maintaining CMOS power efficiency. Input hysteresis ensures noise immunity on control lines, and bus-hold circuitry is not integrated-external pull-ups/downs are required for unused inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC), compatible with TTL input levels and CMOS output swing |
| Supply Voltage Range | 2V to 6V - supports mixed-voltage system interfacing and battery-backed operation |
| Propagation Delay | 7.5ns max (VCC = 5V, CL = 50pF) - enables reliable timing in 20MHz+ synchronous bus designs |
| Output Drive | ±24mA (IOH/IO L) - sufficient to drive 10 LSTTL loads or terminate short PCB traces without external buffers |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications |
| Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC - ensures robust noise margin against ground bounce and crosstalk |
Pinout & Package
CD74AC623M96G4 is housed in a 20-pin SOIC (DW) package, 7.5mm wide, 12.83mm long, 2.65mm max height, RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A-side I/O ports (A1–A8) | Bidirectional data terminals connected to local subsystem (e.g., microcontroller port) |
| 11, 12, 13, 14, 15, 16, 17, 18 | B-side I/O ports (B1–B8) | Bidirectional data terminals connected to shared bus (e.g., memory or peripheral bus) |
| 9, 19 | OE\ (Output Enable) | Active-low enables/disables both A- and B-side outputs simultaneously; high-Z state isolates buses |
| 10, 20 | DIR (Direction Control) | High = A→B data flow; Low = B→A data flow - allows full-duplex bus arbitration per section |
| 20 | VCC | Positive supply pin - must be decoupled locally with 0.1µF ceramic capacitor |
| 10 | GND | Ground reference - shared return path for all I/O and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Dual 4-bit bidirectional transceivers | Enables independent control of two 4-bit data paths - reduces need for discrete logic in multi-bus architectures |
| 3-state outputs with common OE\ | Single pin disables all 16 I/Os into high-impedance - simplifies bus arbitration and prevents contention during reset |
| TTL-compatible input thresholds | Accepts standard 5V TTL logic levels while operating from 2–6V supply - eases migration from legacy TTL systems |
| ±24mA output drive capability | Drives heavy capacitive loads (e.g., >100pF trace + multiple inputs) without signal degradation or timing skew |
| Industrial temperature range support | Validated operation from −40°C to +85°C - suitable for factory automation, motor drives, and outdoor electronics |
Applications
| Microprocessor Bus Isolation | Memory Interface Buffering |
|---|---|
Use Scenario: Isolating CPU address/data bus from peripheral expansion slots to prevent signal contention during hot-plug events. IC Role / Device Role / Timing Role: Bidirectional bus transceiver providing controlled data path enable/disable and direction switching under CPU control. Use Value: Prevents bus conflicts during peripheral insertion/removal and supports dynamic reconfiguration without system reset. | Use Scenario: Interfacing an 8-bit microcontroller to external SRAM or EPROM with mismatched voltage levels or timing margins. IC Role / Device Role / Timing Role: Level-shifting and drive-strengthening transceiver ensuring clean signal integrity across 10cm PCB traces. Use Value: Eliminates need for discrete level shifters and buffer ICs, reducing BOM count and layout complexity. |
| Industrial I/O Expansion | Digital Signal Routing in PLC Modules |
Use Scenario: Extending GPIO count in programmable logic controllers using isolated backplane communication. IC Role / Device Role / Timing Role: Data path controller between local FPGA I/O bank and backplane differential bus drivers. Use Value: Provides deterministic 3-state control timing aligned with FPGA clock domain, avoiding metastability in asynchronous handshaking. | Use Scenario: Routing sensor data and actuator commands between isolated analog front-end and main control unit in modular PLC chassis. IC Role / Device Role / Timing Role: Synchronized bidirectional data shuttle with DIR-controlled flow direction and OE\-gated bus release. Use Value: Enables time-critical command-response cycles (e.g., PID loop updates) with sub-10ns timing predictability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Lower VCC range (1.65–3.6V); 24mA drive; no DIR/OE\ separation - single OE controls all 8 bits | Optimized for 3.3V-only systems; lacks independent direction control per 4-bit group | Select when operating exclusively at 3.3V and simplified control logic is acceptable |
| CD74ACT245E | Same AC logic family; PDIP-20 package; identical pinout but no M96 tape-and-reel variant | Requires through-hole assembly; lacks SOIC-20 tape-and-reel packaging for automated SMT lines | Select for prototyping or legacy through-hole production where reel-fed placement is not required |
Compared with SN74LVC245APWR and CD74ACT245E, the CD74AC623M96G4 uniquely supports dual independent 4-bit sections with separate DIR control and industrial temperature range in a RoHS-compliant SOIC-20 tape-and-reel format - making it optimal for automated SMT deployment in ruggedized embedded systems.
Availability
CD74AC623M96G4 is available at Aetrix Electronics and suitable for industrial control systems, programmable logic controller (PLC) modules, and microprocessor-based instrumentation requiring stable component supply and long-term manufacturability.
Supply support for CD74AC623M96G4 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, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CD74AC623M96G4 belongs to TI's legacy AC logic family, engineered for high-speed, low-power bidirectional data transfer in industrial-grade digital systems where reliability across extended temperature ranges is critical.
FAQ
What is the maximum clock frequency supported by CD74AC623M96G4?
The CD74AC623M96G4 is not a clocked device-it has no internal clock and operates asynchronously. Its usable data rate depends on propagation delay (7.5ns max at 5V) and system setup/hold timing. In practice, it reliably supports bidirectional bus transfers up to 20MHz in well-terminated 5V systems with proper PCB layout and decoupling.
Does CD74AC623M96G4 include bus-hold or weak pull-up circuitry on its inputs?
No, the CD74AC623M96G4 does not integrate bus-hold or weak pull-up circuitry. Unused inputs must be externally terminated to VCC or GND using resistors (typically 10kΩ) to prevent floating states, oscillation, and increased ICC current. This design choice preserves signal integrity and avoids unintended state latching.
Can CD74AC623M96G4 operate at 3.3V supply voltage?
Yes, CD74AC623M96G4 is fully specified for operation from 2V to 6V, including 3.3V. At VCC = 3.3V, VOH ≥ 2.97V and VOL ≤ 0.33V (with IOH/IO L = ±24mA), meeting LVTTL and 3.3V CMOS interface requirements. Propagation delay increases to ~9ns, remaining suitable for most 3.3V embedded interfaces.
What is the meaning of the "M96" suffix in CD74AC623M96G4?
The "M96" suffix in CD74AC623M96G4 indicates a SOIC-20 (DW) package supplied in tape-and-reel format with 2000 units per reel. It distinguishes this version from tube-packaged variants (e.g., CD74AC623M) and confirms RoHS compliance, NIPDAU lead finish, and MSL Level-1 moisture sensitivity rating.
Is CD74AC623M96G4 pin-compatible with CD74ACT623M96?
Yes, CD74AC623M96G4 and CD74ACT623M96 share identical pinout, package (SOIC-20 DW), and functional block diagram. The key difference is logic family: AC uses lower drive current and higher noise immunity, while ACT offers TTL-compatible output drive (±24mA same) but tighter VCC = 4.5–5.5V range. They are functionally interchangeable in most 5V designs, though AC provides wider voltage flexibility.
CD74AC623M96G4 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
CD74AC623M96G4 FAQ
1.How can I place an order for CD74AC623M96G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC623M96G4 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 CD74AC623M96G4 reliable?
The price and inventory of CD74AC623M96G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC623M96G4 is usually 5 days.
3.What payment methods are accepted for CD74AC623M96G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC623M96G4 transactions.
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4.How is shipping managed for CD74AC623M96G4?
CD74AC623M96G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC623M96G4 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 CD74AC623M96G4?
For technical support, including CD74AC623M96G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC623M96G4 requirements.
6.How does Aetrix verify that CD74AC623M96G4 is sourced from the original manufacturer or authorized distributors?
All CD74AC623M96G4 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 CD74AC623M96G4 meets industry standards.
7.What is the process for return or replacement of CD74AC623M96G4?
All CD74AC623M96G4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC623M96G4, 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 CD74AC623M96G4 part is unused and in its original packaging.
Return procedure for CD74AC623M96G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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