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NXP Semiconductors N74F85N,602
- Part No.:
- N74F85N,602
- Manufacturer:
- NXP Semiconductors
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
N74F85N,602.pdf
- Description:
- IC COMPARATOR MAG 4BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,170
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Product details
Overview
N74F85N,602 from Philips Semiconductors is a 4-bit magnitude comparator IC used to determine relative binary word size in digital logic systems. It features active-High A>B, A=B, and A
For engineers reviewing the N74F85N,602 datasheet, N74F85N,602 pinout, N74F85N,602 application, or N74F85N,602 equivalent, key selection criteria include its 16-pin DIP package (SOT38-4), TTL-compatible input loading (1.0/0.033 U.L.), output drive capability (20 mA sink), and feed-forward expansion interface for multi-word comparison.
Technical Context
The N74F85N,602 implements combinational logic to compare two 4-bit binary words (A₀–A₃ and B₀–B₃) with weighted MSB-first ordering. Its three mutually exclusive outputs reflect exact magnitude relationships-greater-than, equal-to, or less-than-under all valid input combinations per the function table.
Expansion is enabled via dedicated IA>B, IA=B, and IA<B inputs that accept feed-forward signals from lower-order stages. In parallel expansion, these inputs serve as a fifth bit position; in serial mode, they connect directly to outputs of adjacent comparators, adding ~15 ns propagation delay per stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL logic rails |
| Propagation Delay (A/B → A>B) | 7.0 ns typical - defines worst-case timing budget for single-stage comparison |
| Output Sink Current | 20 mA - supports direct driving of multiple TTL inputs or small LEDs without buffering |
| Input Loading | 1.0 / 0.033 FAST unit loads (High/Low) - minimizes fan-out constraints in dense logic designs |
| Operating Temperature | 0°C to +70°C - qualifies for commercial-grade embedded control and instrumentation applications |
| Supply Current (ICC) | 40 mA typical - enables power budgeting for multi-comparator systems on shared 5 V rails |
Pinout & Package
Package: 16-pin plastic DIP (SOT38-4), 300 mil body width, through-hole mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A₀) | Input A, LSB | Least significant bit of first 4-bit operand; TTL-compatible voltage thresholds |
| 2 (A₁) | Input A | Second bit of operand A; identical electrical characteristics to A₀ |
| 3 (A₂) | Input A | Third bit of operand A; part of weighted binary input set A₀–A₃ |
| 4 (A₃) | Input A, MSB | Most significant bit of operand A; determines primary comparison hierarchy |
| 5 (B₀) | Input B, LSB | Least significant bit of second 4-bit operand; referenced against A₀ in equality test |
| 6 (B₁) | Input B | Second bit of operand B; contributes to cascaded magnitude evaluation |
| 7 (B₂) | Input B | Third bit of operand B; used in hierarchical comparison sequence |
| 8 (GND) | Ground | Reference node for all input/output logic levels and supply return path |
| 9 (B₃) | Input B, MSB | Most significant bit of operand B; paired with A₃ for initial decision point |
| 10 (IA<B) | Expansion Input | Active-High feed-forward signal indicating lower-stage A<B result; must be Low for LSB device |
| 11 (A=B) | Output | Active-High assertion when A₀–A₃ exactly equals B₀–B₃; mutually exclusive with other outputs |
| 12 (IA=B) | Expansion Input | Active-High feed-forward signal indicating lower-stage A=B result; must be High for LSB device |
| 13 (IA>B) | Expansion Input | Active-High feed-forward signal indicating lower-stage A>B result; must be Low for LSB device |
| 14 (A>B) | Output | Active-High assertion when A₀–A₃ is greater than B₀–B₃; used in priority encoding chains |
| 15 (A<B) | Output | Active-High assertion when A₀–A₃ is less than B₀–B₃; enables signed arithmetic flag generation |
| 16 (VCC) | Supply | +5 V power rail; decoupling capacitor required near pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Serial/parallel expandability | Enables comparison of up to 120-bit words using ≤31 devices without external gating |
| Feed-forward expansion interface | IA>B, IA=B, IA<B inputs allow deterministic multi-stage chaining with defined timing penalties |
| High-impedance NPN base inputs | Reduces loading to 20 µA in both logic states, supporting >20-fan-out in 74F logic families |
| Three mutually exclusive outputs | A>B, A=B, A<B outputs never assert simultaneously-simplifies downstream priority encoding |
Applications
| Digital Arithmetic Unit | Microprocessor Bus Control |
|---|---|
Use Scenario: Comparing register contents during ALU operations in 8-bit or 16-bit microcontrollers. IC Role / Device Role / Timing Role: Performs real-time magnitude evaluation of operands before conditional branching or arithmetic correction. Use Value: Delivers 7.0 ns typical response time, enabling tight integration into instruction execution pipelines without added wait states. | Use Scenario: Monitoring address/data bus arbitration in multi-master systems to resolve memory-mapped I/O conflicts. IC Role / Device Role / Timing Role: Compares incoming address segments against fixed peripheral decode ranges to assert chip-select signals. Use Value: Active-High outputs interface directly with enable inputs of 74-series latches and buffers, eliminating level-shifting components. |
| Industrial PLC Logic Sequencing | Digital Test Equipment |
Use Scenario: Evaluating sensor threshold crossings (e.g., temperature, pressure) encoded as 4-bit BCD values in ladder logic emulation. IC Role / Device Role / Timing Role: Serves as programmable comparator block in modular I/O modules with configurable setpoints. Use Value: Supports monotonic code comparison (BCD or binary), ensuring accurate interpretation of industrial sensor encodings. | Use Scenario: Validating output patterns from DUTs by comparing expected vs. actual 4-bit response vectors in automated test fixtures. IC Role / Device Role / Timing Role: Acts as pass/fail decision engine in go/no-go testers with parallel pattern matching capability. Use Value: Parallel expansion allows simultaneous evaluation of multi-byte responses, reducing test cycle time versus sequential checking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit magnitude comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F85N | Identical logic function, pinout, and AC/DC specs; manufactured by Texas Instruments under same 74F family spec | No functional deviation; validated for drop-in replacement in legacy Philips-based designs | Select SN74F85N when sourcing from TI-distributed channels or requiring dual-sourcing assurance |
| 74LS85N | Slower propagation delay (18 ns typical), lower ICC (19 mA), and reduced output drive (8 mA sink) | Suitable only where timing budgets exceed 15 ns and load requirements are minimal | Choose 74LS85N for cost-sensitive, low-speed applications where power efficiency outweighs speed |
Compared with N74F85N,602, SN74F85N offers identical performance and full pin compatibility, while 74LS85N trades speed and drive strength for lower power consumption-making it viable only in non-critical timing paths.
Availability
N74F85N,602 is available at Aetrix Electronics and suitable for digital arithmetic units, microprocessor bus control, and industrial PLC logic sequencing requiring stable component supply across long-lifecycle embedded programs.
Supply support for N74F85N,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) was a leading European semiconductor manufacturer specializing in logic, analog, and RF solutions for industrial and consumer electronics.
The 74F logic family-including N74F85N,602-was engineered for high-speed TTL-compatible operation in commercial-grade computing and control systems, emphasizing propagation delay reduction and fan-out scalability.
FAQ
What is the operating voltage range for the N74F85N,602?
The N74F85N,602 operates within a supply voltage range of 4.5 V to 5.5 V, aligned with standard 5 V TTL specifications. This range ensures reliable logic-level compatibility with other 74F-series components and supports stable operation across temperature extremes from 0°C to +70°C. The N74F85N,602 maintains specified propagation delay and output drive performance across this full VCC window.
How does the N74F85N,602 support multi-bit word comparison?
The N74F85N,602 supports multi-bit comparison via dedicated expansion inputs IA>B, IA=B, and IA<B, which accept feed-forward signals from lower-order comparator stages. When configured in serial expansion, the A>B, A=B, and A<B outputs of one N74F85N,602 connect directly to these inputs on the next higher stage. The N74F85N,602 datasheet confirms this method scales to 120-bit words using up to 31 devices.
What are the absolute maximum ratings for the N74F85N,602?
The N74F85N,602 has an absolute maximum supply voltage of –0.5 V to +7.0 V and input voltage range of –0.5 V to +7.0 V. Output current is limited to 40 mA in the Low state, and operating temperature must remain between 0°C and +70°C. Exceeding these limits-even briefly-may impair device reliability or cause permanent damage, as stated in the Philips product specification dated September 27, 1994.
Can the N74F85N,602 be used with BCD-encoded inputs?
Yes, the N74F85N,602 explicitly supports magnitude comparison of BCD or other monotonic codes, as confirmed in the Philips product specification. Its logic evaluates weighted binary inputs (A₀–A₃ and B₀–B₃), and because BCD preserves monotonic ordering within each 4-bit nibble, the N74F85N,602 produces correct greater-than/equal-to/less-than results without modification or additional decoding circuitry.
What is the typical propagation delay from input to A=B output in the N74F85N,602?
The N74F85N,602 exhibits a typical propagation delay of 7.0 ns from any A or B input to the A>B or A<B outputs, and 7.0 ns to the A=B output under standard test conditions (VCC = 5.0 V, CL = 50 pF, Tamb = +25°C). These values are documented in the AC Electrical Characteristics table of the official Philips datasheet and define the timing envelope for synchronous system integration.
N74F85N,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Magnitude Comparator
- Number of Bits:
- 4
- Output:
- Active High
- Output Function:
-
A
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Output High, Low:
- 1mA, 20mA
- Max Propagation Delay @ V, Max CL:
- 14ns @ 5V, 50pF
- Current - Quiescent (Iq):
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-DIP
- Mounting Type:
- Through Hole
N74F85N,602 FAQ
1.How can I place an order for N74F85N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F85N,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 N74F85N,602 reliable?
The price and inventory of N74F85N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F85N,602 is usually 5 days.
3.What payment methods are accepted for N74F85N,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F85N,602 transactions.
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4.How is shipping managed for N74F85N,602?
N74F85N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F85N,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 N74F85N,602?
For technical support, including N74F85N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F85N,602 requirements.
6.How does Aetrix verify that N74F85N,602 is sourced from the original manufacturer or authorized distributors?
All N74F85N,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 N74F85N,602 meets industry standards.
7.What is the process for return or replacement of N74F85N,602?
All N74F85N,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F85N,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 N74F85N,602 part is unused and in its original packaging.
Return procedure for N74F85N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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