Timer IC application modes: The 555 timer can operate in bistable (latch) mode and in monostable (one-shot) mode. Decide whether this statement is accurate.

Introduction / Context:
The ubiquitous 555 timer is a versatile analog/digital building block. Designers routinely configure it in several modes depending on external resistors, capacitors, and how the threshold/trigger/control pins are wired.

Given Data / Assumptions:

• Device: 555 timer (standard bipolar or CMOS variants).
• Claim: it supports both bistable and monostable modes.
• Common textbook configurations apply.

Concept / Approach:
Monostable (one-shot): a trigger input causes a single pulse of set width, typically t = 1.1 * R * C. Bistable (latch): by appropriate wiring of the threshold and trigger pins, the 555 acts like an SR latch with set and reset controls. In addition, astable mode provides free-running oscillation, but that does not negate the validity of the other two modes.

Step-by-Step Solution:

Verification / Alternative check:
Typical application notes and datasheets include example schematics for monostable, astable, and bistable configurations, confirming the 555’s multi-mode capability.

Why Other Options Are Wrong:
Incorrect / only monostable / only astable: These ignore the well-documented versatility of the 555.

Common Pitfalls:
Assuming the 555 is only an oscillator. Miswiring control voltage and reset pins can make a monostable behave unreliably.

Final Answer:
Correct