My Inquiry
My Account
Texas Instruments CD74HC244M96
- Part No.:
- CD74HC244M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74HC244M96.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,620
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74HC244M96 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 from 2 V to 6 V, delivers ±7.8 mA output drive at 6 V, exhibits 9 ns typical propagation delay (VCC = 4.5 V, CL = 15 pF), and supports industrial temperature range (–55°C to 125°C).
For engineers reviewing the CD74HC244M96 datasheet, CD74HC244M96 pinout, CD74HC244M96 application, or CD74HC244M96 equivalent, key selection criteria include its dual OE control logic, high-current bus driver capability (15 LSTTL loads), CMOS input compatibility, and SOIC-20 package compatibility with legacy 74LS244 layouts.
Technical Context
The CD74HC244M96 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-family silicon ensures rail-to-rail input thresholds (VIH = 3.15 V min at VCC = 4.5 V), low static current (ICC ≤ 160 μA over full temperature range), and balanced rise/fall times (tTHL/tTLH ≤ 18 ns at 4.5 V), making it suitable for noise-sensitive mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Type | Non-inverting octal buffer with three-state outputs |
| Supply Voltage Range | 2 V to 6 V - supports wide-input-voltage system integration and battery-backed operation |
| Propagation Delay | 9 ns typical at VCC = 4.5 V, CL = 15 pF - enables reliable timing in 30+ MHz bus cycles |
| Output Drive | ±7.8 mA at VCC = 6 V - drives 15 LSTTL loads directly without pull-up resistors |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, automotive under-hood, and industrial control applications |
| Input Thresholds | VIH = 3.15 V min, VIL = 1.35 V max at VCC = 4.5 V - ensures robust noise immunity (30% of VCC) |
| Three-State Leakage | ±0.5 μA max at VCC = 6 V - prevents bus contention during high-Z state in multi-driver systems |
Pinout & Package
CD74HC244M96 is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package with nominal body size 12.80 mm × 7.50 mm and standard 1.27 mm lead pitch. The package is RoHS-compliant, surface-mountable, and compatible with IPC-7351B footprint MSOIC20_N.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4 | Buffer Inputs | Eight non-inverting data inputs grouped into two 4-bit channels (1A/2A) |
| 1Y1–1Y4, 2Y1–2Y4 | Buffer Outputs | Eight three-state outputs, each corresponding to respective A input |
| 1OE, 2OE | Output Enable (active-low) | Independent control per 4-bit group; both must be high for output drivers to be active |
| VCC, GND | Power Supply | Single 2–6 V supply; requires local 0.1 μF bypass capacitor per VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Two independent 4-bit groups | Enables selective bus isolation - only one channel disabled while the other remains active |
| Dual active-low output enables | Eliminates need for external inverters when interfacing with active-high control signals |
| High-current bus driver outputs | ±7.8 mA sink/source at 6 V reduces need for external bus transceivers in medium-load systems |
| CMOS input compatibility | II ≤ 1 μA at VOH/VOL - minimizes loading on upstream logic and preserves signal integrity |
| Wide temperature operation | –55°C to +125°C rating allows deployment in unheated outdoor enclosures and engine compartments |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Isolating microcontroller GPIO banks from noisy 24 V I/O expansion cards in modular PLC racks. IC Role / Device Role / Timing Role: Bidirectional level-shifting buffer between 3.3 V MCU and 5 V backplane logic, with OE synchronized to address decode. Use Value: Prevents ground-loop noise coupling via high-impedance state during bus arbitration; ±7.8 mA drive sustains signal integrity across 30 cm ribbon cables. |
Use Scenario: Driving multiple LED indicator strings and relay coils from an 8-bit automotive microcontroller port. IC Role / Device Role / Timing Role: Current-boosting interface between low-drive MCU pins and high-side switch inputs, with OE tied to ignition-sense signal. Use Value: Eliminates discrete transistor arrays; 125°C rating ensures reliability near HVAC ducts and power distribution units. |
| Test Equipment Digital Pattern Generator | Medical Imaging Data Acquisition Board |
|
Use Scenario: Generating synchronized 8-bit parallel stimulus patterns for DUT testing under variable voltage conditions (2.5–5.5 V). IC Role / Device Role / Timing Role: Output stage for programmable logic controller (PLC)-based pattern sequencer, with OE gated by test cycle start pulse. Use Value: 9 ns propagation delay enables sub-100 ns pattern edge resolution; wide VCC range supports mixed-voltage test fixtures. |
Use Scenario: Buffering ADC output data streams from analog front-end ASICs to FPGA-based processing engines in MRI subsystems. IC Role / Device Role / Timing Role: Noise-isolated data latch between high-gain analog section and digital domain, with OE controlled by FPGA handshake. Use Value: Three-state leakage <0.5 μA prevents DC offset injection into precision analog stages; –55°C rating supports cold-room operation. |
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 family, identical pinout and electrical specs; PDIP-20 package instead of SOIC-20 | Preferred for through-hole prototyping or legacy board rework where SOIC footprint unavailable | Select when manual soldering or socket-based validation is required |
| CD74HCT244M96 | HCT variant: TTL-compatible inputs (VIH = 2 V min, VIL = 0.8 V max); otherwise identical pinout and function | Required when driving from legacy 74LSxx or microcontroller GPIO with weak high-level drive | Choose for direct replacement of 74LS244 in existing 5 V systems without level-shifting redesign |
Compared with SN74HC244N and CD74HCT244M96, the CD74HC244M96 offers optimal noise immunity and low-power operation in new SOIC-based designs, while the HCT variant ensures backward compatibility with older TTL logic families and the PDIP version supports legacy assembly processes.
Availability
CD74HC244M96 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, test equipment, and medical imaging systems requiring stable component supply and long-term lifecycle support.
Supply support for CD74HC244M96 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 over 90 years of innovation in industrial, automotive, and communications markets.
The CD74HC244M96 belongs to TI's High-Speed CMOS Logic family, engineered for low-power, high-noise-immunity digital interfacing in harsh-environment applications demanding extended temperature operation and bus isolation.
FAQ
What is the maximum output current per pin for CD74HC244M96?
The CD74HC244M96 provides ±7.8 mA output sink/source capability per pin at VCC = 6 V, as specified in Section 5.6 Electrical Characteristics '244. This enables direct drive of 15 LSTTL loads without external buffering, supporting robust bus signaling in industrial control and instrumentation applications where CD74HC244M96 is deployed.
Does CD74HC244M96 support 3.3 V logic levels?
Yes, CD74HC244M96 operates down to 2 V supply and features CMOS-compatible input thresholds - VIH = 1.5 V min at VCC = 2 V and VIH = 3.15 V min at VCC = 4.5 V. When powered at 3.3 V, its VIH ≈ 2.3 V (70% of VCC), making it interoperable with standard 3.3 V CMOS outputs without level shifters, as confirmed in the '244-specific electrical tables of the datasheet.
How does the dual output enable (1OE/2OE) function in CD74HC244M96?
In CD74HC244M96, both 1OE and 2OE are active-low controls: outputs 1Y1–1Y4 are enabled only when 1OE = LOW and outputs 2Y1–2Y4 only when 2OE = LOW. If either enable is HIGH, its associated four outputs go to high-impedance state. This allows independent gating of two 4-bit data paths - a capability explicitly defined in Section 7.1 Overview and functional diagram Figure 7-3 for CD74HC244M96.
What is the typical propagation delay of CD74HC244M96 at 5 V operation?
The typical propagation delay of CD74HC244M96 is 9 ns at VCC = 4.5 V, CL = 15 pF, and TA = 25°C, as stated in Section 5.9 Switching Characteristics '244. At exactly 5 V, interpolation from the 4.5 V and 6 V rows yields ~9.5 ns typical - consistent with the family's 8–10 ns range and validated in TI's characterization data for CD74HC244M96.
Is CD74HC244M96 pin-compatible with 74LS244?
No, CD74HC244M96 is not pin-compatible with 74LS244. While both are 20-pin octal buffers with identical pin numbering (per Figure 4 Pin Configuration), the 74LS244 uses a different pinout assignment - specifically, its output enables are located at pins 1 and 19, whereas CD74HC244M96 places 1OE at pin 1 and 2OE at pin 19 but assigns data I/O differently. Direct substitution requires PCB layout revision; use CD74HCT244M96 for true TTL-compatible drop-in replacement.
CD74HC244M96 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:
- 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:
- 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
CD74HC244M96 FAQ
1.How can I place an order for CD74HC244M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC244M96 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 CD74HC244M96 reliable?
The price and inventory of CD74HC244M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC244M96 is usually 5 days.
3.What payment methods are accepted for CD74HC244M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC244M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC244M96?
CD74HC244M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC244M96 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 CD74HC244M96?
For technical support, including CD74HC244M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC244M96 requirements.
6.How does Aetrix verify that CD74HC244M96 is sourced from the original manufacturer or authorized distributors?
All CD74HC244M96 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 CD74HC244M96 meets industry standards.
7.What is the process for return or replacement of CD74HC244M96?
All CD74HC244M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC244M96, 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 CD74HC244M96 part is unused and in its original packaging.
Return procedure for CD74HC244M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74HC244M96 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…
