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Renesas 74AC273P-E
- Part No.:
- 74AC273P-E
- Manufacturer:
- Renesas
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
74AC273P-E.pdf
- Description:
- OCTAL D-TYPE FLIP-FLOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,000
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Product details
Overview
74AC273P-E from Renesas is an octal D-type flip-flop with edge-triggered operation, buffered common clock (CP) and asynchronous master reset (MR), 8-bit parallel data storage, ±24 mA output drive, and DIP-20 package. It functions as a synchronous register in digital control logic for microprocessor bus interfacing and state retention.
For engineers reviewing the 74AC273P-E datasheet, 74AC273P-E pinout, 74AC273P-E application, or 74AC273P-E equivalent, this page delivers verified timing parameters (tPLH/tPHL ≤10 ns at VCC=5.0 V), DC specs (VIH=3.85 V min, VOL=0.37 V max), operating range (–40°C to +85°C), and direct package mapping to DP-20N.
Technical Context
The 74AC273P-E implements eight independent D flip-flops sharing a single low-to-high edge-triggered clock input and an active-low asynchronous master reset. All outputs update synchronously on CP rising edge, while MR forces Qn = L regardless of clock or data state.
It operates across 2.0–6.0 V supply, supports 125 MHz max clock frequency at 5.0 V, and meets AC/DC specifications under –40°C to +85°C ambient conditions with CL = 50 pF load. Input setup/hold times are defined per voltage range (e.g., tsu = 4.0 ns min at 5.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC), compatible with TTL input thresholds and 5 V systems |
| Supply Voltage Range | 2.0 V to 6.0 V - enables dual-rail compatibility and noise margin flexibility |
| Max Clock Frequency | 125 MHz at VCC = 5.0 V - supports high-speed bus latch timing in microcontroller peripherals |
| Propagation Delay (tPLH/tPHL) | ≤10.0 ns at VCC = 5.0 V, CL = 50 pF - ensures tight timing alignment in synchronous pipelines |
| Output Drive Strength | ±24 mA - directly drives multiple TTL inputs or small LED loads without buffering |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control environments |
| Input Capacitance | 4.5 pF - minimizes loading on preceding logic stages and preserves signal integrity |
Pinout & Package
DIP-20 package (JEDEC MS-001, Renesas package code DP-20N), 2.54 mm pitch, through-hole mounting, 24.5 mm × 6.3 mm body size, 1.26 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply rail - must be decoupled locally with 0.1 µF ceramic capacitor |
| 2–9 | Q0–Q7 | True outputs of eight D flip-flops - non-inverting, push-pull, ±24 mA capable |
| 10–17 | D0–D7 | Data inputs - sampled on CP rising edge; require valid setup/hold timing |
| 18 | MR | Active-low asynchronous master reset - forces all Qn = L immediately, overriding clock |
| 19 | GND | Ground reference - connect to system ground plane with low-inductance path |
| 20 | CP | Buffered clock input - edge-triggered; rising edge loads Dn to Qn synchronously |
Key Features
| Feature | Design Value |
|---|---|
| Edge-triggered register architecture | Ensures deterministic sampling at precise clock edges, eliminating metastability risk in synchronous designs |
| Buffered common clock and reset | Reduces fanout loading and skew across all eight flip-flops for consistent timing behavior |
| Asynchronous master reset (MR) | Enables immediate global state clearing without waiting for next clock edge - critical for power-up initialization |
| High-output drive (±24 mA) | Drives up to 10 LS-TTL loads or interfaces directly with optocouplers and small-signal transistors |
| Wide supply range (2.0–6.0 V) | Supports mixed-voltage system integration, including 3.3 V logic interfacing with 5 V legacy buses |
Applications
| Microprocessor Bus Interface | Industrial I/O Expansion |
|---|---|
Use Scenario: Latching address/data bus signals during microcontroller read/write cycles to isolate peripheral timing. IC Role / Device Role / Timing Role: Synchronous register holding stable bus values between CPU strobes; CP synchronized to WR/RD control. Use Value: Eliminates need for external glue logic by providing eight-bit edge-triggered storage with common control lines. | Use Scenario: Capturing parallel sensor or switch inputs in PLC modules before serial transmission to host controller. IC Role / Device Role / Timing Role: Input capture register sampling discrete field signals on system clock edge; MR used for cold-start reset. Use Value: Provides deterministic input sampling with guaranteed setup/hold margins and industrial temperature support. |
| LED Display Driver Control | Digital State Machine Register |
Use Scenario: Holding segment or digit enable states for multiplexed 7-segment displays driven by microcontroller GPIO. IC Role / Device Role / Timing Role: Output latch staging display data; CP driven by display refresh timer, MR clears display on fault. Use Value: Delivers 24 mA per output to directly drive common-anode segments without external drivers. | Use Scenario: Storing current state bits in finite-state machines implemented in discrete logic (e.g., motor sequencers, protocol encoders). IC Role / Device Role / Timing Role: State register updated on clock edge; MR initializes known start state on power-up or error recovery. Use Value: Ensures glitch-free state transitions and deterministic reset behavior across all eight bits simultaneously. |
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 |
|---|---|---|---|
| SN74AC273N | Same AC logic family, identical pinout (DIP-20), but TI-specified tPLH/tPHL ≤9.5 ns at 5 V | Marginally faster propagation; identical industrial temp range and drive strength | Select when sub-nanosecond timing margin is required in high-frequency bus latching |
| 74VHC273N | Higher speed (tPLH/tPHL ≤7.5 ns), lower ICC (2 µA typical), but only rated to +70°C ambient | Limited to commercial-temperature applications; not suitable for extended industrial environments | Prefer for cost-sensitive consumer electronics where ambient stays below 70°C |
Compared with SN74AC273N and 74VHC273N, the 74AC273P-E provides identical DIP-20 mechanical compatibility and full industrial temperature support (–40°C to +85°C), while offering balanced speed (10 ns), drive (±24 mA), and quiescent current (80 µA max) for robust embedded control use.
Availability
74AC273P-E is available at Aetrix Electronics and suitable for microprocessor bus interface, industrial I/O expansion, and LED display driver control requiring stable component supply and long-term industrial-grade availability.
Supply support for 74AC273P-E 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
Renesas Electronics Corporation is a global semiconductor manufacturer specializing in microcontrollers, analog, and logic devices for automotive, industrial, and IoT applications.
The HD74AC series delivers advanced CMOS logic with TTL-compatible inputs and enhanced speed/power trade-offs, designed specifically for reliable digital interfacing and control in harsh industrial environments.
FAQ
What is the maximum clock frequency supported by the 74AC273P-E?
The 74AC273P-E supports a maximum clock frequency of 125 MHz at VCC = 5.0 V and CL = 50 pF, as specified in the AC Characteristics table. At 3.3 V supply, the guaranteed minimum is 75 MHz. These values assume proper signal integrity, decoupling, and load conditions per the datasheet's test setup.
Does the 74AC273P-E have a 3-state output option?
No, the 74AC273P-E does not include 3-state outputs. It features standard push-pull outputs with ±24 mA drive capability. For 3-state functionality, Renesas offers the HD74AC374 - a functionally similar octal D flip-flop with output-enable control, also available in DIP-20 (HD74AC374P).
What is the purpose of the Master Reset (MR) pin on the 74AC273P-E?
The MR pin on the 74AC273P-E is an active-low asynchronous reset that forces all eight Q outputs to logic Low immediately, regardless of clock or data inputs. This enables deterministic power-on initialization or emergency state clearing without waiting for the next clock edge.
Can the 74AC273P-E operate at 3.3 V supply voltage?
Yes, the 74AC273P-E is fully specified for operation at 3.3 V (±0.3 V), with guaranteed performance including fmax ≥75 MHz, VIH ≥2.1 V, and VOL ≤0.37 V. Its 2.0–6.0 V supply range makes it suitable for mixed-voltage systems interfacing 3.3 V controllers with 5 V peripherals.
Is the 74AC273P-E pin-compatible with the 74LS273?
Yes, the 74AC273P-E is pin-compatible with the 74LS273 in DIP-20 package, sharing identical pin assignments for VCC, GND, CP, MR, D0–D7, and Q0–Q7. However, it is not a direct functional drop-in due to differences in input thresholds, output drive, and timing - design validation is required for replacement.
74AC273P-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74AC273P-E FAQ
1.How can I place an order for 74AC273P-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC273P-E 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 74AC273P-E reliable?
The price and inventory of 74AC273P-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC273P-E is usually 5 days.
3.What payment methods are accepted for 74AC273P-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC273P-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC273P-E?
74AC273P-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC273P-E 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 74AC273P-E?
For technical support, including 74AC273P-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC273P-E requirements.
6.How does Aetrix verify that 74AC273P-E is sourced from the original manufacturer or authorized distributors?
All 74AC273P-E 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 74AC273P-E meets industry standards.
7.What is the process for return or replacement of 74AC273P-E?
All 74AC273P-E units undergo pre-shipment inspection (PSI). If there is an issue with 74AC273P-E, 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 74AC273P-E part is unused and in its original packaging.
Return procedure for 74AC273P-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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