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NXP Semiconductors N74F821N,602
- Part No.:
- N74F821N,602
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
N74F821N,602.pdf
- Description:
- IC FF D-TYPE SNGL 10BIT 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,961
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Product details
Overview
N74F821N,602 from Philips Semiconductors is a 10-bit non-inverting bus interface register with 3-state outputs, positive-edge-triggered D-type flip-flops, 180 MHz max clock frequency, and DIP24 package. It buffers wide data/address buses carrying parity in high-speed microprocessor systems.
For engineers reviewing the N74F821N,602 datasheet, N74F821N,602 pinout, N74F821N,602 application, or N74F821N,602 equivalent, key selection criteria include 3-state output drive capability (24 mA source / 64 mA sink), input loading (20 µA HIGH/LOW), propagation delay (4.0–8.5 ns), and compatibility with AMD AM29821 broadside pinout.
Technical Context
The N74F821N,602 implements ten independent D-type flip-flops synchronized to the rising edge of CP, with common clock and active-low output enable (OE). Its buffered control inputs reduce AC coupling effects on timing integrity.
Each output supports true 3-state operation with glitch-free behavior during power-up/down, and clamped over-shoot protection ensures robustness against transient voltage excursions at inputs and outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 10-bit non-inverting bus interface register with 3-state outputs |
| Max Clock Frequency | 180 MHz - enables high-throughput data latching in fast bus architectures |
| Output Drive | Sources 24 mA / sinks 64 mA - drives heavy capacitive loads without external buffers |
| Input Loading | 20 µA in HIGH/LOW states - reduces fan-out burden on upstream logic |
| Propagation Delay | 4.0–8.5 ns (CP to Qn) - supports tight timing budgets in 5 V TTL/Fast TTL systems |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V ±10 % commercial rail |
| Operating Temperature | 0 °C to +70 °C - suitable for commercial-grade embedded and computing applications |
Pinout & Package
Package: DIP24 (plastic dual in-line package, 300 mil width, 24 leads, SOT222-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and I/O |
| 2 | OE | Active-low output enable controlling all 10 Qn outputs |
| 3 | CP | Positive-edge-triggered clock input synchronizing Dn→Qn transfer |
| 4–11, 13–14, 16–23 | D0–D9 | 10-bit parallel data inputs latched on CP rising edge |
| 15–16, 18–24, 1, 2 | Q0–Q9 | 10-bit non-inverting registered outputs with 3-state control |
| 12 | GND | Second ground pin for improved noise immunity and current return path |
| 24 | VCC | +5 V supply pin powering internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| High-impedance PNP base inputs | Reduces input loading to 20 µA in both HIGH and LOW states, minimizing drive burden on preceding gates |
| Glitch-free 3-state outputs | Prevents bus contention during power sequencing by ensuring outputs remain high-impedance until stable supply |
| Broadside pinout compatibility | Matches AMD AM29821 layout, enabling drop-in replacement in legacy designs using that footprint |
| Clamped over-shoot protection | Input pins limit positive/negative transients to ground, improving ESD resilience without external diodes |
| Buffered control inputs | OE and CP inputs include internal buffering to suppress noise coupling into timing-critical paths |
Applications
| Microprocessor Data Bus Buffering | Parity Bus Extension |
|---|---|
Use Scenario: Extending 8-bit data paths to 10-bit width while maintaining timing alignment with CPU address/data strobes. IC Role / Device Role / Timing Role: Acts as a synchronous latch registering parallel data from ALU or memory controller before driving wider bus segments. Use Value: Eliminates need for multiple 74F374 packages, reducing board area and interconnect skew across 10-bit paths. | Use Scenario: Adding parity bits to existing 8-bit data buses in industrial controllers requiring fault detection. IC Role / Device Role / Timing Role: Captures and holds parity bits generated by separate XOR networks alongside main data words. Use Value: Provides dedicated 10-bit storage with simultaneous 3-state control, enabling clean parity injection without bus contention. |
| Address Bus Width Expansion | Test Equipment Signal Capture |
Use Scenario: Expanding 16-bit address buses to 20-bit in legacy minicomputer backplanes supporting larger memory maps. IC Role / Device Role / Timing Role: Registers upper address bits under same clock domain as lower bits, preserving setup/hold timing across full width. Use Value: Delivers matched propagation delay (≤8.5 ns) across all 10 bits, avoiding address skew-induced memory access errors. | Use Scenario: Capturing parallel digital waveforms from DUTs in automated test systems operating at >100 MHz. IC Role / Device Role / Timing Role: Serves as high-speed acquisition latch sampling multi-bit signals on rising clock edges with minimal jitter sensitivity. Use Value: 180 MHz fmax and 4.0 ns typical tPLH ensure accurate capture of fast transitions without metastability risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus interface register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F821N | Identical logic function, pinout, and DC/AC specs; Texas Instruments second-source version | No functional deviation; validated for same 5 V TTL systems and timing margins | Select when TI-sourced supply chain diversification is required without design change |
| 74ACT821PC | Higher speed (fmax = 200 MHz), lower ICC (20 mA typical), but 3.3 V–5.5 V supply range and different input thresholds | Requires level-shifting or mixed-voltage design support; not drop-in for pure 5 V systems | Choose only if upgrading to ACT logic family for lower power or higher frequency, accepting voltage compatibility review |
Compared with SN74F821N and 74ACT821PC, the N74F821N,602 offers guaranteed 5 V operation, proven compatibility with AMD AM29821 layouts, and identical Philips-spec propagation delays-making it optimal for maintaining legacy 5 V bus designs without revalidation.
Availability
N74F821N,602 is available at Aetrix Electronics and suitable for microprocessor bus buffering, parity extension, address expansion, and high-speed test equipment signal capture requiring stable component supply across long-lifecycle industrial programs.
Supply support for N74F821N,602 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
Philips Semiconductors (now NXP Semiconductors) is a global semiconductor innovator founded in the Netherlands, specializing in logic, analog, and interface ICs for industrial and computing markets.
The 74F logic family-including N74F821N,602-was engineered for high-speed 5 V TTL-compatible systems, targeting bus interface, data path expansion, and synchronous latching in microprocessor-based equipment.
FAQ
What is the maximum clock frequency supported by the N74F821N,602?
The N74F821N,602 supports a maximum clock frequency of 180 MHz under typical conditions (VCC = 5.0 V, Tamb = 25 °C, CL = 50 pF). Over the full commercial temperature range (0 °C to +70 °C), the guaranteed minimum fmax is 140 MHz per the AC Electrical Characteristics table in the Philips datasheet.
Does the N74F821N,602 have true 3-state outputs with power-up/down safety?
Yes, the N74F821N,602 features glitch-free 3-state outputs that remain in high-impedance state during power-up and power-down sequences. This prevents bus contention and ensures safe initialization without external reset coordination, as confirmed in the Features section and FUNCTION TABLE of the Philips datasheet.
Is the N74F821N,602 pin-compatible with the AMD AM29821 device?
Yes, the N74F821N,602 uses a broadside pinout explicitly stated as compatible with AMD AM29821 in the Philips datasheet Features section. Pin assignments for Dn, Qn, CP, OE, VCC, and GND match, enabling mechanical and electrical interchangeability in existing PCB footprints.
What are the output drive capabilities of the N74F821N,602?
The N74F821N,602 outputs source up to 24 mA in the HIGH state and sink up to 64 mA in the LOW state, as specified in the Features and DC Electrical Characteristics sections. These values are measured under recommended operating conditions and define the maximum load the device can directly drive without external buffers.
What is the input loading specification for the N74F821N,602 data and control pins?
The N74F821N,602 exhibits 20 µA input current in both HIGH and LOW states for Dn, CP, and OE pins, per the INPUT AND OUTPUT LOADING AND FAN-OUT TABLE. This low loading reduces fan-out requirements and allows direct connection to high-impedance sources such as MOS microprocessor outputs.
N74F821N,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- Clock Frequency:
- 180 MHz
- Max Propagation Delay @ V, Max CL:
- 8.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 105 mA
- Input Capacitance:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-DIP
N74F821N,602 FAQ
1.How can I place an order for N74F821N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F821N,602 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 N74F821N,602 reliable?
The price and inventory of N74F821N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F821N,602 is usually 5 days.
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N74F821N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F821N,602 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 N74F821N,602?
For technical support, including N74F821N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F821N,602 requirements.
6.How does Aetrix verify that N74F821N,602 is sourced from the original manufacturer or authorized distributors?
All N74F821N,602 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 N74F821N,602 meets industry standards.
7.What is the process for return or replacement of N74F821N,602?
All N74F821N,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F821N,602, 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 N74F821N,602 part is unused and in its original packaging.
Return procedure for N74F821N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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