Commercial TTL/CMOS families commonly offer octal (8-bit) packages: many basic latches and flip-flops are available as ICs with eight elements sharing a common clock or enable.
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ACorrect
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BIncorrect
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COnly true for dynamic latches
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DOnly true for ASIC libraries
Answer
Correct Answer: Correct
Explanation
Introduction / Context: Digital systems operate on bytes and words, so industry-standard ICs frequently bundle eight similar elements in a single package. Examples include octal latches, octal flip-flops, and octal bus drivers with common control lines for compact board designs.
Given Data / Assumptions:
- Octal parts like 74HC373/74HC573 (octal transparent latches) and 74HC273/74HC374 (octal edge-triggered flip-flops) are widely used.
- Common control pins (CLK, EN, OE) simplify synchronous interfacing to 8-bit buses.
- Both TTL-compatible and CMOS families exist.
Concept / Approach: Grouping eight storage elements matches 8-bit data paths, minimizing pin count and routing complexity while improving timing uniformity. A shared clock/enable ensures coherent updates across the byte-wide register or latch.
Step-by-Step Solution:
Select an octal device appropriate to needs (latch vs flip-flop, tri-state outputs as required).Connect shared control (CLK/EN/OE) to the bus timing signals.Wire D[7:0] and Q[7:0] to the system data path.Leverage the common control to capture or present a full byte atomically.Verification / Alternative check: Consult typical microprocessor-era schematics: address/data latching commonly uses octal packages for convenience and standardization.
Why Other Options Are Wrong: It is not restricted to dynamic latches or ASIC libraries; off-the-shelf octal ICs are ubiquitous. Saying “Incorrect” ignores decades of standard logic practice.
Common Pitfalls: Confusing dual or quad packages (like 7474 dual D FF) with octal; both exist. Designers must pick the form factor that matches the datapath width.
Final Answer: Correct