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Texas Instruments CD74AC244M96
- Part No.:
- CD74AC244M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74AC244M96.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,151
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Product details
Overview
CD74AC244M96 from Texas Instruments is an octal 3-state non-inverting buffer/line driver in SOIC-20 package, operating from 1.5 V to 5.5 V, delivering ±24 mA output drive per channel with balanced propagation delays (e.g., 7.5 ns max at 5 V), and used for bidirectional bus interfacing in industrial control backplanes.
For engineers reviewing the CD74AC244M96 datasheet, CD74AC244M96 pinout, CD74AC244M96 application, or CD74AC244M96 equivalent, key selection criteria include 3-state enable timing (tPZL/tPLZ ≤ 15 ns), 50-Ω transmission-line drive capability, input voltage thresholds compatible with TTL and CMOS logic families, and thermal performance in SOIC-20 (RθJA = 101.2°C/W).
Technical Context
The CD74AC244M96 implements two independent 4-bit banks (Bank 1: pins 2–9; Bank 2: pins 11–18), each with active-low output enable (1OE on pin 1, 2OE on pin 19), enabling selective bus isolation. Its RCA Advanced CMOS process ensures SCR latch-up resistance and operation across −40°C to +85°C.
It features symmetric AC-series electrical characteristics: VIH = 3.85 V (min at VCC = 5.5 V), VOL = 0.5 V (max at IO = 24 mA, VCC = 4.5 V), and CPD = 71 pF - directly supporting low-power, high-speed digital interface design without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 5.5 V - supports mixed-voltage system interfacing (e.g., 3.3 V microcontroller to 5 V peripheral bus) |
| Output Drive Current | ±24 mA per output - drives 50 Ω transmission lines directly and fans out to 15 FAST ICs |
| Propagation Delay | 7.5 ns max (tPHL/tPLH at VCC = 5 V, CL = 50 pF) - enables reliable operation up to ~100 MHz data rates |
| 3-State Enable/Disable Time | tPZL/tPLZ ≤ 15 ns (at VCC = 5 V) - minimizes bus contention during dynamic bus arbitration |
| Input Thresholds | VIH = 3.85 V min, VIL = 1.65 V max (at VCC = 5.5 V) - provides 0.85 V noise margin vs. TTL-compatible inputs |
| Power Dissipation Capacitance | CPD = 71 pF - enables accurate dynamic power estimation: PD = VCC² × fi × (71 pF + CL) |
| Operating Temperature | −40°C to +85°C - qualified for industrial embedded applications including PLC I/O modules |
Pinout & Package
CD74AC244M96 is housed in a 20-pin SOIC (DW) package (12.8 mm × 10.3 mm body with leads), optimized for surface-mount assembly and thermal management in space-constrained industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables for Bank 1 and Bank 2 - asserted low to enable respective 4-channel outputs |
| 2, 4, 6, 8 | 1A0–1A3 | Bank 1 input channels - accept logic signals routed to corresponding outputs 1Y0–1Y3 (pins 18, 16, 14, 12) |
| 11, 13, 15, 17 | 2A0–2A3 | Bank 2 input channels - feed signals to outputs 2Y0–2Y3 (pins 9, 5, 7, 3) |
| 12, 14, 16, 18 | 1Y0–1Y3 | Bank 1 non-inverting buffered outputs - electrically isolated when 1OE = high |
| 3, 5, 7, 9 | 2Y0–2Y3 | Bank 2 non-inverting buffered outputs - high-impedance state activated by 2OE = high |
| 10 | GND | Ground reference - must be low-impedance connection to minimize switching noise coupling |
| 20 | VCC | Positive supply - requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latch-up-resistant CMOS process | Guarantees robust operation in electrically noisy industrial environments without destructive latch-up events |
| Balanced propagation delays | Ensures simultaneous edge alignment across all 8 outputs - critical for parallel bus integrity and setup/hold timing |
| 1.5 V to 5.5 V wide supply range | Eliminates need for level translators when interfacing 1.8 V, 2.5 V, 3.3 V, or 5 V logic domains |
| ±24 mA output drive | Directly terminates 50 Ω transmission lines - avoids external series resistors in high-speed backplane designs |
| 3-state leakage current ≤ ±5 µA | Prevents signal corruption during bus contention or hot-swap scenarios where multiple drivers share a line |
Applications
| Industrial Backplane Interface | Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Isolating and driving parallel address/data buses between a PLC CPU module and distributed I/O cards over 10–20 cm PCB traces. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing bidirectional bus separation and signal integrity restoration. Use Value: Enables clean 5 V bus signaling at >20 MHz with <15 ns enable/disable latency, reducing inter-slot skew and eliminating contention-induced glitches. |
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU (3.3 V I/O) to drive legacy 5 V peripherals like LCD controllers or DACs. IC Role / Device Role / Timing Role: Level-translating buffer with rail-to-rail output swing and TTL-compatible input thresholds. Use Value: Delivers full 5 V logic swing from 3.3 V inputs without external biasing, while maintaining <8 ns propagation delay for real-time control loops. |
| Test Equipment Signal Routing | Automated Test Fixture Control |
|
Use Scenario: Multiplexing stimulus signals from a PXI-based pattern generator to multiple DUT sites using shared cabling infrastructure. IC Role / Device Role / Timing Role: Channel-selectable 3-state driver enabling time-multiplexed access to common test nodes. Use Value: Achieves <15 ns output disable time to prevent signal bleed between test sequences, ensuring measurement repeatability across 100+ DUTs. |
Use Scenario: Controlling 8-channel relay arrays in semiconductor ATE fixtures requiring precise sequencing and isolation between control and sensing paths. IC Role / Device Role / Timing Role: High-current digital switch interface with independent bank enables for staggered actuation. Use Value: Supplies 24 mA per channel to directly drive relay coils, eliminating discrete transistor stages and reducing BOM count by 8×. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AC244N | Same AC logic family, identical pinout and specs, but in PDIP-20 package (24.33 mm × 9.4 mm); RθJA = 40°C/W vs. 101.2°C/W | Preferred for prototyping or through-hole assembly; higher thermal efficiency but larger footprint | Select SN74AC244N for breadboard evaluation or legacy through-hole production; CD74AC244M96 preferred for volume SMT manufacturing. |
| CD74ACT244M96 | TTL-compatible input thresholds (VIH = 2.0 V min), faster propagation (7.8 ns max), but narrower 4.5–5.5 V supply range | Required only when interfacing with legacy 5 V TTL sources; not suitable for mixed-voltage or sub-4.5 V systems | Choose CD74ACT244M96 only if driven exclusively by 5 V TTL logic; CD74AC244M96 offers broader voltage flexibility and lower static current. |
Compared with SN74AC244N and CD74ACT244M96, CD74AC244M96 uniquely balances wide supply range (1.5–5.5 V), industrial temperature rating, and SOIC-20 manufacturability - making it optimal for cost-sensitive, high-volume embedded systems requiring voltage interoperability.
Availability
CD74AC244M96 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and microcontroller peripheral expansion requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for CD74AC244M96 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 connectivity technologies, with decades of expertise in logic IC design and industrial-grade reliability validation.
CD74AC244M96 belongs to TI's CD74AC high-speed CMOS logic family, engineered for low-power, high-noise-immunity digital interfacing in harsh industrial and automotive-qualified environments.
FAQ
What is the maximum operating temperature range for CD74AC244M96?
The CD74AC244M96 is rated for operation from −40°C to +85°C, meeting industrial temperature requirements. This range is confirmed in Section 4.2 Recommended Operating Conditions of the TI datasheet SCHS287C, and applies specifically to the CD74AC244M96 variant in SOIC-20 (DW) package.
Does CD74AC244M96 support 3.3 V logic levels?
Yes, CD74AC244M96 fully supports 3.3 V operation: its 1.5 V to 5.5 V supply range includes 3.3 V nominal, and input thresholds (VIH = 2.1 V min, VIL = 0.9 V max at VCC = 3.3 V) ensure compatibility with standard 3.3 V CMOS outputs without level shifting.
What is the pinout configuration of CD74AC244M96?
CD74AC244M96 uses a 20-pin SOIC (DW) package with dual 4-bit banks: Bank 1 inputs (1A0–1A3) on pins 2,4,6,8; outputs (1Y0–1Y3) on pins 18,16,14,12; Bank 2 inputs (2A0–2A3) on pins 11,13,15,17; outputs (2Y0–2Y3) on pins 9,5,7,3; 1OE/2OE on pins 1/19; GND on pin 10; VCC on pin 20.
Can CD74AC244M96 drive 50 Ω transmission lines directly?
Yes, CD74AC244M96 is explicitly characterized to drive 50 Ω transmission lines - verified per Section 4.4 Static Electrical Characteristics (note 2) and Figure 4-1 test conditions, delivering ±24 mA output current sufficient for clean 50 Ω termination at 5 V.
Is CD74AC244M96 pin-compatible with CD74ACT244M96?
Yes, CD74AC244M96 and CD74ACT244M96 share identical SOIC-20 (DW) pinout, pin functions, and package dimensions - enabling direct substitution in layouts where voltage and timing requirements align, though ACT variants require ≥4.5 V supply and exhibit TTL input thresholds.
CD74AC244M96 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:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74AC244M96 FAQ
1.How can I place an order for CD74AC244M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC244M96 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 CD74AC244M96 reliable?
The price and inventory of CD74AC244M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC244M96 is usually 5 days.
3.What payment methods are accepted for CD74AC244M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC244M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74AC244M96?
CD74AC244M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC244M96 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 CD74AC244M96?
For technical support, including CD74AC244M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC244M96 requirements.
6.How does Aetrix verify that CD74AC244M96 is sourced from the original manufacturer or authorized distributors?
All CD74AC244M96 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 CD74AC244M96 meets industry standards.
7.What is the process for return or replacement of CD74AC244M96?
All CD74AC244M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC244M96, 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 CD74AC244M96 part is unused and in its original packaging.
Return procedure for CD74AC244M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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