規格
| 屬性 | 價值 |
| Supplier | Rochester Electronics, LLC |
| Package / Case | Bulk |
| Series | 3VH |
| Part Status | Active |
| Type | Bus Switch |
| Circuit | 4 x 2:1 |
| Independent Circuits | 1 |
| Voltage Supply Source | Single Supply |
| Voltage - Supply | 2.3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
概述
Description
QS3VH257QG is likely a part number for a quad 2-input multiplexer with tri-state outputs (a VH-family device, e.g., TI SN74VH257). It provides four independent 2:1 multiplexers with a common select input and a global enable to tri-state all outputs. Typical uses include routing data on a digital bus, interfacing a microprocessor to peripherals, and general data multiplexing in digital circuits. Key features often include CMOS/TTL-compatible inputs, four outputs (Y0–Y3), a common select input, and an enable input; operating in the VH voltage range (about 4.5–5.5 V) depending on the manufacturer.
Note: exact specs and packaging depend on the manufacturer. If you share the vendor (TI, NXP, etc.) or a datasheet link, I can tailor the intro with precise electrical characteristics and pinout.
Note: exact specs and packaging depend on the manufacturer. If you share the vendor (TI, NXP, etc.) or a datasheet link, I can tailor the intro with precise electrical characteristics and pinout.
Equivalent
QS3VH257QG is a quad 2-to-1 data selector with 3-state outputs (74xx257 family). Equivalents include:
- TI: SN74VHC257, SN74VH257, SN74LVC257
- NXP/ON Semiconductor: 74HC257, 74HCT257
- 74LS257, 74LVC257
Note: for a drop-in replacement, verify voltage range, package/pinout, and timing in the datasheet or distributor cross-reference.
- TI: SN74VHC257, SN74VH257, SN74LVC257
- NXP/ON Semiconductor: 74HC257, 74HCT257
- 74LS257, 74LVC257
Note: for a drop-in replacement, verify voltage range, package/pinout, and timing in the datasheet or distributor cross-reference.
Features
QS3VH257QG is a TI/74VHx family device: Quad 2-input multiplexer with 3-state outputs. Key features include:
- Quad 2-input multiplexers with a common select input
- 3-state outputs (tri-statable via an enable input)
- 4.5–5.5 V supply range (5 V nominal)
- VH family: high-speed CMOS performance
- Low static power consumption
- TTL/CMOS input level compatibility
- Input protection/ESD protection on inputs
- Pin-for-pin compatibility within the 74VH257 family
(Refer to the exact datasheet for propagation delays, drive strength, and package details.)
- Quad 2-input multiplexers with a common select input
- 3-state outputs (tri-statable via an enable input)
- 4.5–5.5 V supply range (5 V nominal)
- VH family: high-speed CMOS performance
- Low static power consumption
- TTL/CMOS input level compatibility
- Input protection/ESD protection on inputs
- Pin-for-pin compatibility within the 74VH257 family
(Refer to the exact datasheet for propagation delays, drive strength, and package details.)
Pinout
- Pin count: 20 pins (DIP-20 / SO-20).
- Function: Quad 2-input multiplexer with 3-state outputs (A0–A3 or B0–B3 selected via a common S; outputs Y0–Y3; OE is typically active-low to enable/tri-state the outputs).
- Function: Quad 2-input multiplexer with 3-state outputs (A0–A3 or B0–B3 selected via a common S; outputs Y0–Y3; OE is typically active-low to enable/tri-state the outputs).
Application
QS3VH257QG is a quad 2-input multiplexer with tri-state outputs (high-speed CMOS). Key applications include:
- Data routing on shared buses in microprocessors/DSPs (selecting between two sources per line).
- Memory and I/O interfaces, including address/data multiplexing and bus isolation.
- Digital signal processing boards and test equipment for multiplexing signals.
- Video/audio/data switching in consumer electronics.
- General-purpose logic for controlled data selection and bus-compatible gating.
- Data routing on shared buses in microprocessors/DSPs (selecting between two sources per line).
- Memory and I/O interfaces, including address/data multiplexing and bus isolation.
- Digital signal processing boards and test equipment for multiplexing signals.
- Video/audio/data switching in consumer electronics.
- General-purpose logic for controlled data selection and bus-compatible gating.
