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NXP Semiconductors N74F244DB,118
- Part No.:
- N74F244DB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
N74F244DB,118.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,406
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Product details
Overview
N74F244DB,118 from NXP Semiconductors (formerly Philips) is an octal 3-state buffer IC designed for bus interface and memory address register driving in TTL-compatible digital systems. It features dual active-low output enables (OEa/OEb), 64mA sink/15mA source drive capability per output, 4.0ns typical propagation delay, and operates at 5V ±10% over 0°C to +70°C. It is used in industrial control backplanes and legacy data acquisition subsystems.
For engineers reviewing the N74F244DB,118 datasheet, N74F244DB,118 pinout, N74F244DB,118 application, or N74F244DB,118 equivalent, key selection criteria include 3-state timing skew (<2.0ns for B-version), industrial-grade IIL (-40µA), SSOP-20 package footprint, and compatibility with 5V TTL logic families.
Technical Context
The N74F244DB,118 implements two independent 4-bit non-inverting 3-state buffers, each controlled by a dedicated active-low enable input (OEa for Ya0–Ya3, OEb for Yb0–Yb3). All outputs support high-current sinking (64mA) and sourcing (15mA), enabling direct drive of heavy capacitive bus loads without external buffering.
As the B-version variant, it incorporates split lead frame construction to reduce ground bounce, lowers total supply current (33mA typical vs. 53mA for standard 74F244), and reduces input leakage (IIL = -40µA), making it suitable for noise-sensitive industrial environments where signal integrity and power efficiency are prioritized over raw speed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V–5.5V - Ensures stable operation across standard 5V TTL rail tolerances. |
| Propagation Delay | 4.0ns typical - Enables reliable timing in 25MHz+ synchronous bus interfaces. |
| Output Sink Current | 64mA per pin - Drives up to 10 standard TTL loads or 50pF bus capacitance directly. |
| Input Leakage (IIL) | -40µA - Reduces bus loading and improves noise margin in high-density layouts. |
| Operating Temperature | 0°C to +70°C - Qualified for commercial-grade embedded control and instrumentation. |
| Output Skew | <2.0ns - Guarantees simultaneous valid data on all 8 outputs for coherent bus sampling. |
| Package Type | SSOP-20 (SOT339-1), 5.3mm body width - Provides compact surface-mount footprint with improved thermal dissipation vs. DIP/SO. |
Pinout & Package
Package: Plastic shrink small outline package (SSOP-20), 20-pin, body width 5.3 mm (SOT339-1), gull-wing leads, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OEa | Active-low enable for Ya0–Ya3 outputs; asserts 3-state when high. |
| 2–5 | Ia0–Ia3 | Non-inverting input for Ya0–Ya3; accepts TTL-level signals (VIH ≥ 2.0V, VIL ≤ 0.8V). |
| 6–9 | Yb0–Yb3 | Non-inverting buffered outputs driven by Ib0–Ib3; 64mA sink capability. |
| 10 | GND | Ground reference for all logic and output stages; critical for low-noise operation. |
| 11–14 | Ia0–Ia3 | Non-inverting inputs for Ya0–Ya3; electrically identical to pins 2–5. |
| 15–18 | Ya0–Ya3 | Non-inverting buffered outputs driven by Ia0–Ia3; fully 3-state controllable via OEa. |
| 19 | OEb | Active-low enable for Yb0–Yb3 outputs; independent control from OEa. |
| 20 | VCC | +5V supply input; decoupling capacitor required within 10mm for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit enables | OEa and OEb allow selective activation of two 4-bit bus segments without gating logic. |
| Reduced ground bounce | Split lead frame minimizes simultaneous switching noise during multi-output transitions. |
| Low input leakage | IIL = -40µA enables higher fan-out and longer trace routing without signal degradation. |
| Guaranteed output skew | <2.0ns ensures deterministic timing alignment across all 8 outputs for synchronous capture. |
| Industrial-grade drive strength | 64mA sink per output supports termination-resistor-loaded buses and legacy TTL loads. |
Applications
| Industrial Backplane Interface | Legacy Memory Address Buffering |
|---|---|
|
Use Scenario: Driving parallel address/data buses between microcontroller and multiple peripheral ICs in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus isolator and level translator between CPU and I/O modules, providing 3-state isolation during bus arbitration. Use Value: Dual OE control allows independent segment enablement, reducing contention and simplifying bus grant logic in multi-master systems. |
Use Scenario: Buffering 16-bit address lines from an 80C88 CPU to EPROM and RAM chips in retro-computing or test equipment designs. IC Role / Device Role / Timing Role: Non-inverting address driver with high sink current to meet TTL loading requirements of multiple memory devices. Use Value: 64mA per output ensures full VIH/VIL margins across 10+ TTL loads, eliminating need for cascaded buffers. |
| Test Equipment Signal Conditioning | Automated Test Fixture Control |
|
Use Scenario: Isolating and amplifying digital stimulus signals from pattern generators before applying to DUTs in ATE systems. IC Role / Device Role / Timing Role: Output buffer stage that converts low-drive FPGA outputs into robust, slew-controlled bus drivers. Use Value: Low 4.0ns propagation delay and sub-2ns skew preserve timing fidelity across multi-channel parallel test vectors. |
Use Scenario: Controlling relay banks and LED status indicators in PCB assembly test fixtures using microcontroller GPIO expansion. IC Role / Device Role / Timing Role: General-purpose digital output expander with high-current capability for direct actuation of electromechanical components. Use Value: 15mA source/64mA sink per pin eliminates external transistors for driving LEDs, solenoids, and optocouplers. |
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 |
|---|---|---|---|
| SN74F244N | Dual-in-line package (DIP-20); higher ICC (53mA typical); no split lead frame; IIL = -1.6mA. | Suitable for prototyping and through-hole PCBs; less suitable for high-density SMT layouts or noise-critical environments. | Select when manual soldering, breadboarding, or legacy board rework is required. |
| 74ACT244SCX | CMOS technology; 5V tolerant; 24mA sink; 12ns propagation delay; wider VCC range (4.5–5.5V); lower power. | Better for mixed-voltage systems and low-power standby modes; not drop-in compatible due to different AC characteristics and drive profile. | Select when interfacing with CMOS peripherals or extending battery life in portable test gear. |
Compared with SN74F244N and 74ACT244SCX, the N74F244DB,118 delivers superior noise immunity and lower input loading in SSOP form factor, making it optimal for space-constrained industrial boards requiring TTL-compatible timing and drive strength without layout redesign.
Availability
N74F244DB,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy memory subsystems, automated test fixture control, and signal conditioning circuits requiring stable component supply and long-term obsolescence management.
Supply support for N74F244DB,118 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic IC development.
The 74F family was engineered for high-speed TTL-compatible digital systems requiring robust drive strength and precise timing-specifically targeting industrial control, instrumentation, and legacy computing infrastructure.
FAQ
What is the operating temperature range for N74F244DB,118?
The N74F244DB,118 is specified for commercial operation from 0°C to +70°C. While the base 74F244 supports industrial range (-40°C to +85°C), the N74F244DB,118 variant is qualified only for the commercial temperature grade per Philips documentation and ordering information.
Does N74F244DB,118 support 3.3V logic interfaces?
No, the N74F244DB,118 is a 5V-only TTL-family device with VCC specification of 4.5V–5.5V. Its input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V) and output levels (VOH ≥ 2.5V, VOL ≤ 0.55V) are optimized for 5V TTL compatibility-not 3.3V LVTTL or CMOS logic.
What is the maximum capacitive load the N74F244DB,118 can drive reliably?
The N74F244DB,118 is characterized with CL = 50pF in AC specifications and supports up to 64mA sink current per output. This enables reliable driving of ≥50pF bus capacitance at full speed, assuming proper PCB layout, decoupling, and termination.
Is N74F244DB,118 pin-compatible with standard 74F244 packages?
Yes-the N74F244DB,118 uses the SSOP-20 (SOT339-1) package with identical pin numbering and function mapping as other 74F244 variants. Pin 1 is OEa, pin 10 is GND, pin 19 is OEb, and pin 20 is VCC-matching the logic diagram and pin configuration in the Philips datasheet.
How does the "B" suffix in N74F244DB,118 affect its electrical behavior?
The "B" denotes the enhanced version: reduced ground bounce via split lead frame, lower ICC (33mA vs. 53mA), lower input leakage (IIL = -40µA vs. -1.6mA), and guaranteed output skew <2.0ns. These improvements enhance noise immunity and power efficiency without altering logic function or timing compatibility.
N74F244DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 15mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
N74F244DB,118 FAQ
1.How can I place an order for N74F244DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F244DB,118 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 N74F244DB,118 reliable?
The price and inventory of N74F244DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F244DB,118 is usually 5 days.
3.What payment methods are accepted for N74F244DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F244DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for N74F244DB,118?
N74F244DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F244DB,118 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 N74F244DB,118?
For technical support, including N74F244DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F244DB,118 requirements.
6.How does Aetrix verify that N74F244DB,118 is sourced from the original manufacturer or authorized distributors?
All N74F244DB,118 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 N74F244DB,118 meets industry standards.
7.What is the process for return or replacement of N74F244DB,118?
All N74F244DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with N74F244DB,118, 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 N74F244DB,118 part is unused and in its original packaging.
Return procedure for N74F244DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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