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NXP Semiconductors 74ABT273AD,118
- Part No.:
- 74ABT273AD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT273AD,118.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,638
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Product details
Overview
74ABT273AD,118 from NXP Semiconductors (formerly Philips) is an octal D-type flip-flop with edge-triggered operation, buffered clock (CP) and asynchronous master reset (MR), 5 V supply, -40°C to +85°C operating range, and 20-pin SO package. It transfers eight parallel data bits on the rising edge of CP and forces all Q outputs low when MR is asserted, used in synchronous register control for industrial logic systems.
For engineers reviewing the 74ABT273AD,118 datasheet, 74ABT273AD,118 pinout, 74ABT273AD,118 application, or 74ABT273AD,118 equivalent, key selection criteria include propagation delay (3.0 ns typical CP→Q), input capacitance (3.5 pF), power-up reset behavior, ESD robustness (>2000 V HBM), and compatibility with 5 V TTL/ABT logic families.
Technical Context
The 74ABT273AD,118 implements eight independent D-type flip-flops sharing a common rising-edge–triggered clock (CP) and active-low asynchronous master reset (MR). All outputs respond synchronously to CP transitions and asynchronously to MR assertion, with no clock enable or output enable functionality.
It operates strictly within 4.5 V to 5.5 V supply range, supports ±32 mA high-level and 64 mA low-level output drive, and features power-up reset that guarantees Q outputs start low at VCC ramp-up - critical for deterministic initialization in control registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/ABT logic rails and noise margin compliance. |
| Propagation Delay (CP→Q) | 3.0 ns typical (CL = 50 pF, VCC = 5 V) - enables reliable operation up to 250 MHz maximum clock frequency. |
| Input Capacitance | 3.5 pF - minimizes loading on preceding drivers and preserves signal integrity in high-speed bus interfaces. |
| Output Drive | -32 mA (IOH), +64 mA (IOL) - supports direct fan-out to multiple 74-series inputs without buffering. |
| ESD Protection | >2000 V HBM - meets Mil Std 833 Method 3015, reducing risk of handling damage in assembly environments. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded control and automation applications. |
Pinout & Package
74ABT273AD,118 is supplied in a 20-pin plastic small outline package (SO), body width 7.5 mm, per SOT163-1 standard. Pin pitch is 1.27 mm, with gull-wing leads suitable for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR | Active-Low asynchronous master reset - forces all Q0–Q7 low regardless of CP or D states. |
| 2,5,6,9,12,15,16,19 | Q0–Q7 | True (non-inverted) registered outputs - reflect Dn state sampled one setup time before CP rising edge. |
| 3,4,7,8,13,14,17,18 | D0–D7 | Independent parallel data inputs - each latched into corresponding flip-flop on CP rising edge. |
| 10 | GND | Ground reference - must be connected to system 0 V plane for stable logic thresholds and noise immunity. |
| 11 | CP | Buffered clock input - rising-edge–triggered; internal buffering reduces skew and improves drive capability. |
| 20 | VCC | Positive supply - requires local 100 nF decoupling capacitor near pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-triggered register | Single-cycle synchronous capture of eight parallel data bits on CP rising edge - eliminates metastability risk from asynchronous sampling. |
| Power-up reset | Guaranteed low Q outputs at VCC ramp-up - prevents undefined logic states during system boot without external reset circuitry. |
| Buffered clock and reset | Reduced input loading and improved signal integrity - allows daisy-chaining multiple devices without timing degradation. |
| High ESD tolerance | 2000 V HBM rating - exceeds industry standard for handling robustness in manufacturing and field service. |
Applications
| Industrial PLC I/O Register | Memory Address Latch |
|---|---|
Use Scenario: Capturing parallel sensor status bits (e.g., 8-channel limit switch array) in programmable logic controller backplane modules. IC Role / Device Role / Timing Role: Synchronous register holding real-time input state until next scan cycle; CP synchronized to main controller clock. Use Value: Ensures deterministic sampling window and eliminates race conditions between input changes and CPU read access. | Use Scenario: Latching 8-bit address segments (e.g., A0–A7) during microprocessor memory access cycles where address stability is required before memory enable. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing address lines at precise CPU timing edges. Use Value: Prevents address glitches during multiplexed bus transitions, improving memory access reliability in 8-bit embedded systems. |
| Serial-to-Parallel Shift Register Stage | Test Pattern Generator Register |
Use Scenario: Expanding serial test data streams into parallel control signals for boundary-scan or JTAG-based board-level diagnostics. IC Role / Device Role / Timing Role: Parallel output stage receiving serialized data via shift register chain; CP driven by test clock. Use Value: Enables compact, low-pin-count test interface while delivering full 8-bit parallel stimulus to DUT pins. | Use Scenario: Holding fixed test vectors (e.g., 0xAA, 0x55) in automated functional test fixtures for digital IC validation. IC Role / Device Role / Timing Role: Static pattern register initialized once at test start; MR used to reload known state between test sequences. Use Value: Eliminates need for continuous pattern generation hardware, reducing fixture complexity and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT273N | 20-pin PDIP package; identical AC/DC specs and pinout; same ABT family process. | Through-hole mounting only; lacks SO's thermal and space advantages for modern PCBs. | Select for legacy through-hole designs or prototyping where socketing is preferred. |
| 74LVX273M | Lower voltage (2.7–3.6 V), higher tPLH (5.5 ns typ), different input thresholds (LVCMOS), not 5 V tolerant. | Requires level-shifting in 5 V systems; unsuitable for direct replacement without redesign. | Choose only for new 3.3 V logic systems prioritizing lower power over speed and compatibility. |
Compared with SN74ABT273N and 74LVX273M, the 74ABT273AD,118 offers optimal balance of 5 V compatibility, SO packaging for density and thermal performance, and sub-4 ns propagation delay - making it the preferred choice for industrial 5 V register applications requiring surface-mount reliability.
Availability
74ABT273AD,118 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, memory address latching circuits, and test pattern generator systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT273AD,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 company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The 74ABT273AD,118 belongs to the ABT (Advanced BiCMOS Technology) logic family, designed for high-speed, low-noise 5 V digital systems requiring robust drive strength and precise timing control.
FAQ
What is the function of the MR pin on the 74ABT273AD,118?
The MR (Master Reset) pin on the 74ABT273AD,118 is an active-low asynchronous control input. When pulled low, it forces all eight Q outputs (Q0–Q7) to logic low immediately, independent of the clock (CP) or data (D) inputs. This provides deterministic initialization and emergency clear functionality essential for safety-critical and startup-sensitive logic systems using the 74ABT273AD,118.
Does the 74ABT273AD,118 support 3.3 V operation?
No, the 74ABT273AD,118 does not support 3.3 V operation. Its recommended operating supply voltage is strictly 4.5 V to 5.5 V, and its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output drive characteristics are specified only for 5 V rail use. Using the 74ABT273AD,118 at 3.3 V may result in unreliable switching, excessive current draw, or permanent damage due to underspecified internal biasing.
Is the 74ABT273AD,118 pin-compatible with the 74ABT273A D package variant?
Yes, the 74ABT273AD,118 is pin-compatible with the base 74ABT273A in SO package (SOT163-1). Both share identical pin configuration, electrical specifications, and functional behavior. The "D" suffix and ",118" ordering code denote the same 20-pin SO variant - the 74ABT273AD,118 is the standardized NXP part number for this configuration.
What is the maximum clock frequency supported by the 74ABT273AD,118?
The 74ABT273AD,118 supports a maximum clock frequency of 250 MHz under typical conditions (Tamb = +25°C, VCC = 5.0 V), with guaranteed minimum of 250 MHz across the full -40°C to +85°C operating range. This is derived from its 4.8 ns maximum propagation delay (CP to Q) and 1.5 ns minimum clock pulse width requirements specified in the official datasheet for the 74ABT273AD,118.
Does the 74ABT273AD,118 have 3-state outputs?
No, the 74ABT273AD,118 does not have 3-state outputs. It provides true (non-inverting) push-pull outputs only. For 3-state functionality, NXP offers the pin-compatible 74ABT374 - a functionally equivalent octal D-type flip-flop with output enable (OE) control. The 74ABT273AD,118 is intended for applications where outputs drive dedicated loads or wired-OR buses without contention.
74ABT273AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 350 MHz
- Max Propagation Delay @ V, Max CL:
- 4.6ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 250 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74ABT273AD,118 FAQ
1.How can I place an order for 74ABT273AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT273AD,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 74ABT273AD,118 reliable?
The price and inventory of 74ABT273AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT273AD,118 is usually 5 days.
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Once your 74ABT273AD,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 74ABT273AD,118?
For technical support, including 74ABT273AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT273AD,118 requirements.
6.How does Aetrix verify that 74ABT273AD,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT273AD,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 74ABT273AD,118 meets industry standards.
7.What is the process for return or replacement of 74ABT273AD,118?
All 74ABT273AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT273AD,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 74ABT273AD,118 part is unused and in its original packaging.
Return procedure for 74ABT273AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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