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SN74CB3Q3251PWR

Name: SN74CB3Q3251PWR
Rating: 4.7 (12 reviews)

IC MUX/DEMUX 1 X 8:1 16TSSOP

製造商
製造商。部分 #SN74CB3Q3251PWR
包 16-TSSOP (0.173, 4.40mm Width)
資料表 SN74CB3Q3251PWR DataSheet
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規格

Supplier	Texas Instruments,Rochester Electronics, LLC
Package	Tape & Reel (TR),Cut Tape (CT),Bulk
Series	74CB
ProductStatus	Active
Type	Multiplexer/Demultiplexer
Circuit	1 x 8:1
IndependentCircuits	1
VoltageSupplySource	Single Supply
Voltage-Supply	2.3V ~ 3.6V
OperatingTemperature	-40°C ~ 85°C
MountingType	Surface Mount
Package/Case	16-TSSOP (0.173, 4.40mm Width)

概述

Description

SN74CB3Q3251PWR is TI’s 32-bit bidirectional bus switch. It provides a single 32 I/O port (often viewed as two 16- or one 32-bit bus) that can connect two buses under control, acting as a buffer/isolation device between devices or bus segments.
Key features:
- Bidirectional data path with tri-state outputs
- DIR control to select data flow direction (A→B or B→A)
- OE (output enable) to place I/Os in high-impedance when not in use
- Low on-resistance for fast signal propagation and good bus integrity
- Suitable for bus buffering, isolation, level shifting, and bridging between buses with different loads or voltages
Packaging:
- PWR suffix indicates a RoHS-compliant, lead-free package with a PowerPAD-style thermal option for better heat dissipation.
Typical uses:
- Microprocessor/memory bus buffering, signal routing in expandible buses, test fixtures, and any scenario needing controlled, bidirectional data paths.
Note: For exact pinout, voltage ranges, and timing specs, refer to the TI data sheet.

Features

Here are the typical features of the SN74CB3Q3251PWR:
- 32-bit bidirectional bus buffer/level shifter (A-side to B-side and vice versa)
- Two supply rails for level shifting (VCCA and VCCB)
- Direction control input (DIR) to select data flow A→B or B→A
- Global output-enable (OE) to place all outputs in high-impedance
- Ioff specification enables true partial-power-down isolation on I/O pins
- 3-state outputs with low on-resistance when enabled
- Suitable for voltage translation and bus isolation in mixed-voltage systems
- ESD protection and robust input/output tolerance
- Pb-free, RoHS-compliant package with PowerPAD option for good thermal performance
Note: Always verify exact pinout, voltage ranges, and timing in the datasheet for your specific package and operating conditions.

Package

PowerPAD package: HTSSOP-16 (16-pin) Pb-free variant.

Pinout

Pin count: 40-pin package (typical TI PWR version in a TSSOP/VSSOP-40).
Function: Three-channel bidirectional bus switch/transceiver with 3‑state outputs. It routes data between two buses on each channel under enable/direction control and tri-states when disabled, used for isolating or multiplexing bus lines.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: American multinational corporation and leading semiconductor manufacturer that designs and produces analog and digital integrated circuits and related semiconductor devices.

Application

Application areas:
- High-speed bidirectional bus switching and buffering for data/address lines
- Voltage-level translation in mixed-voltage systems
- Bus isolation to prevent contention
- Used in microprocessor–memory interconnects, backplanes, and digital signal routing
- Suitable for consumer electronics, automotive ECUs, telecom, industrial control, and data acquisition/interface boards

Equivalent

SN74CB3Q3251PWR is a 32-bit bidirectional bus transceiver (3-state outputs) in a 2.7–3.6 V rail. Direct equivalents from other vendors include:
- Nexperia: 74CB3Q3251
- ON Semiconductor: NC7CB3251 (32-bit bus transceiver)
Note: packaging, voltage window and timing must match. Use distributor cross-reference tools (Digi-Key, Mouser) for exact substitutes.