SN74LV8154PW

Counter Dividers Overview

The SN74LV8154PW is a dual 16-bit binary counter with 3-state output registers, designed for 2-V to 5.5-V VCC operation. It features dedicated clock inputs (CLKA, CLKB) and shares a clocked storage register (RCLK) to sample counter contents. Both counters share an asynchronous clear input (CCLR). The 32-bit storage register maps onto an 8-bit output bus (Y0-Y7) via four gate inputs (GAL, GAU, GBL, GBU), requiring four reads to access full counts. Counters chain by connecting CLKBEN to RCOA. All clocks are positive edge triggered; other inputs are active low.

Counter Dividers Feature Summary

• Supports partial-power-down mode operation through Ioff circuitry that disables outputs to prevent backflow current.
• Provides latch-up performance exceeding 250 mA per JESD 17 specification.
• Includes ESD protection exceeding specified limits for human body model, machine model, and charged-device model testing.

Counter Dividers Applications

• Up counters
• Dual up counters

Counter Dividers Procurement Notes

Verify the specific package type required, as the SN74LV8154PW designation indicates a TSSOP-20 package. Confirm RoHS compliance status and lead finish details from the manufacturer's orderable addendum. Ensure design compatibility with the -40°C to +85°C operating temperature range. Check current production status, as some variants may be obsolete while others remain active.

Counter Dividers Selection Notes

Select this component when dual independent 16-bit counting or a single chained 32-bit count is required within a system using 2-V to 5.5-V logic levels. The shared storage register allows efficient sampling of both counters simultaneously. Consider the TSSOP-20 package constraints if space is limited. Verify that the application can accommodate the four-bus-read mechanism for accessing the full 32-bit stored value.

Counter Dividers Part Context

This device belongs to the Texas Instruments SN74LV series, which covers LV, LV-A, and LVX logic families. It is distinct from the SN74LV8154N, which utilizes a PDIP-20 package. The PW suffix specifically denotes the Thin-Shrink Small-Outline Package. It serves as a specialized counter/register solution rather than a general-purpose logic gate.

Counter Dividers Replacement Considerations

Public confirmed substitute part numbers: SN74LV8154N, SN74LV8154NE4, SN74LV8154PWR, SN74LV8154PWR.A.