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Texas Instruments CD74HC244M96G4
- Part No.:
- CD74HC244M96G4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74HC244M96G4.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,717
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Product details
Overview
CD74HC244M96G4 from Texas Instruments is a non-inverting octal buffer/line driver with three-state outputs and dual active-low output enables, designed for bidirectional bus interfacing in 5-V digital systems. It operates across 2 V to 6 V, delivers 7.8 mA sink/source per output, exhibits 9 ns typical propagation delay at 5 V/15 pF, and supports industrial temperature range (–55°C to 125°C) for use in programmable logic controllers and data acquisition backplanes.
For engineers reviewing the CD74HC244M96G4 datasheet, CD74HC244M96G4 pinout, CD74HC244M96G4 application, or CD74HC244M96G4 equivalent, key selection criteria include its HC-family CMOS logic compatibility, high-current bus driving capability (15 LSTTL loads), three-state control timing (30–45 ns enable/disable), and SOIC-20 package footprint for space-constrained PCB layouts.
Technical Context
The CD74HC244M96G4 implements two independent 4-bit non-inverting buffer sections, each controlled by its own active-low output enable (1OE, 2OE). All eight outputs enter high-impedance state when either enable is asserted low, enabling shared-bus arbitration without external logic.
Its HC process ensures rail-to-rail input thresholds (VIH = 3.15 V min, VIL = 1.35 V max at VCC = 4.5 V), noise immunity of 30% of VCC, and static power consumption below 160 μA over full temperature range - distinguishing it from HCT variants optimized for TTL-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), not TTL-compatible - requires ≥3.15 V VIH at 4.5 V supply |
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing and brown-out resilience down to 2 V |
| Output Drive Strength | ±7.8 mA at VCC = 6 V - drives 15 LSTTL loads, sufficient for backplane termination and fanout expansion |
| Propagation Delay | 9 ns typical (VCC = 4.5 V, CL = 15 pF) - enables reliable operation up to ~30 MHz data rates in buffered paths |
| Three-State Enable Time | 30–45 ns (VCC = 4.5 V) - defines minimum bus turnaround latency between master/slave device handshaking |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, automotive under-hood, and industrial motor control environments |
| Input Leakage Current | ±1 μA max (VCC = 6 V) - negligible loading on upstream drivers, critical for low-power sensor interface stages |
Pinout & Package
CD74HC244M96G4 is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package measuring 12.80 mm × 7.50 mm, with standard 1.27 mm pitch and gull-wing leads compatible with automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 9 | Input A1–A8 | Non-inverting data inputs; accept 2–6 V logic levels with 10 pF input capacitance |
| 11, 12, 13, 14, 15, 16, 17, 18 | Output Y1–Y8 | Three-state buffered outputs; high-impedance when OE asserted, ±7.8 mA drive capability |
| 19 | 1OE | Active-low enable for Y1–Y4; assertion forces Y1–Y4 into high-Z regardless of A1–A4 state |
| 10 | 2OE | Active-low enable for Y5–Y8; independent control allows split-bus segmentation |
| 20 | VCC | Positive supply (2–6 V); requires local 0.1 μF bypass capacitor per TI layout guidelines |
| 8 | GND | Ground reference; must be low-impedance plane to maintain noise margin and switching integrity |
Key Features
| Feature | Design Value |
|---|---|
| Non-inverting octal buffering | Preserves signal polarity across all 8 channels - eliminates need for external inversion logic in bus repeaters |
| Dual independent output enables | Enables selective activation of upper/lower 4-bit segments - reduces contention during partial bus updates |
| High-current bus driver outputs | Drives 15 LSTTL loads per output - supports longer trace lengths and higher fanout than standard logic buffers |
| Wide supply voltage range (2–6 V) | Operates across battery-backed, 3.3 V, and 5 V domains without level shifters - simplifies multi-rail system design |
| Industrial temperature rating | Validated performance from –55°C to +125°C - meets MIL-PRF-38535 Class B and automotive AEC-Q100 stress requirements |
Applications
| Industrial PLC Backplane Interface | Test Equipment Digital I/O Expansion |
|---|---|
Use Scenario: Isolating CPU address/data buses from modular I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent 4-bit enables, managing read/write arbitration and load isolation. Use Value: Prevents signal degradation across 20+ cm backplane traces while supporting hot-swap sequencing via controlled three-state entry. |
Use Scenario: Expanding digital stimulus/response channels in automated test equipment racks. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer between FPGA controller and DUT interface connectors. Use Value: Delivers 7.8 mA drive per line to meet TTL/CMOS load specs across 32-channel parallel interfaces without added transceivers. |
| Automotive Body Control Module | Medical Data Acquisition Front-End |
Use Scenario: Interfacing microcontroller GPIOs to distributed sensor/actuator networks in engine bay modules. IC Role / Device Role / Timing Role: Robust signal conditioner with wide-temp operation and ESD-hardened inputs. Use Value: Maintains logic integrity at 125°C ambient and withstands automotive load-dump transients via internal clamp diodes. |
Use Scenario: Buffering analog-to-digital converter parallel outputs to isolated microcontroller buses in patient-monitoring devices. IC Role / Device Role / Timing Role: Low-noise, low-leakage data latch stage minimizing sampling error from bus coupling. Use Value: Input leakage ≤1 μA prevents ADC reference current path corruption; 10 pF input capacitance avoids clock jitter on sampling edges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC244N | Same HC logic, identical pinout and specs, but in PDIP-20 package (25.4 mm × 6.35 mm) | Through-hole assembly only; lacks SOIC thermal performance (RθJA = 84.6°C/W vs. 109.1°C/W) | Select for prototyping or legacy through-hole production where reflow is unavailable |
| CD74HCT244M96 | HCT variant: TTL-compatible inputs (VIH = 2 V min, VIL = 0.8 V max), same SOIC-20 package | Required when interfacing directly to 5 V TTL outputs without level translation | Select when upstream logic is standard TTL or LS-TTL; avoid if driving from 3.3 V MCU GPIOs |
Compared with SN74HC244N and CD74HCT244M96, CD74HC244M96G4 provides optimal balance of surface-mount reliability, wide-voltage flexibility, and noise-immune CMOS inputs - making it preferred for new 5 V embedded designs requiring long-term supply continuity and thermal headroom.
Availability
CD74HC244M96G4 is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and automotive electronics requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for CD74HC244M96G4 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 high-reliability logic families.
CD74HC244M96G4 belongs to TI's CD74HC high-speed CMOS logic portfolio, engineered for robustness in harsh environments and compatibility with legacy TTL systems while delivering lower power and higher noise immunity.
FAQ
What is the maximum output current per pin for CD74HC244M96G4?
The CD74HC244M96G4 supports ±7.8 mA output current per pin at VCC = 6 V, as specified in its Electrical Characteristics table for VOH/VOL under IOH/IOL = 7.8 mA conditions. This enables direct driving of 15 LSTTL loads and ensures signal integrity across moderate-length PCB traces without external amplification.
Does CD74HC244M96G4 support 3.3 V logic inputs?
Yes, CD74HC244M96G4 accepts 3.3 V logic inputs reliably: at VCC = 4.5 V, its VIH(min) is 3.15 V and VIL(max) is 1.35 V, placing 3.3 V within the valid high-input window. However, ensure VCC ≥ 4.5 V when interfacing with 3.3 V sources to maintain noise margin and avoid marginal switching.
Can CD74HC244M96G4 be used in place of CD74HCT244M96?
No - CD74HC244M96G4 and CD74HCT244M96 are not interchangeable without circuit review. The HC version requires VIH ≥ 3.15 V at 4.5 V supply, while HCT accepts TTL-level inputs (VIH ≥ 2 V). Substituting HC for HCT may cause logic failures when driven by legacy 5 V TTL outputs.
What is the recommended bypass capacitor for CD74HC244M96G4?
Texas Instruments specifies a 0.1 μF ceramic capacitor placed as close as possible to the VCC pin (Pin 20) and GND (Pin 8) of CD74HC244M96G4. For enhanced high-frequency noise suppression, pairing it with a 1 μF capacitor in parallel is acceptable and commonly implemented in industrial PCB layouts.
Is CD74HC244M96G4 RoHS compliant?
Yes, CD74HC244M96G4 is RoHS compliant, as confirmed by Texas Instruments' packaging documentation: it uses NiPdAu (NIPDAU) lead finish and meets EU Directive 2011/65/EU requirements, with no exemptions applied for lead content in the SOIC-20 package.
CD74HC244M96G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74HC244M96G4 FAQ
1.How can I place an order for CD74HC244M96G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC244M96G4 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 CD74HC244M96G4 reliable?
The price and inventory of CD74HC244M96G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC244M96G4 is usually 5 days.
3.What payment methods are accepted for CD74HC244M96G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC244M96G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC244M96G4?
CD74HC244M96G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC244M96G4 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 CD74HC244M96G4?
For technical support, including CD74HC244M96G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC244M96G4 requirements.
6.How does Aetrix verify that CD74HC244M96G4 is sourced from the original manufacturer or authorized distributors?
All CD74HC244M96G4 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 CD74HC244M96G4 meets industry standards.
7.What is the process for return or replacement of CD74HC244M96G4?
All CD74HC244M96G4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC244M96G4, 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 CD74HC244M96G4 part is unused and in its original packaging.
Return procedure for CD74HC244M96G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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