ISL84543CB - Dual SPST Analog Switch, 60 Ohm, 8-SOIC | Renesas
料号： ISL84543CB ✓ 量产中ISL84543CB 概述
An analog switch is a semiconductor interface that connects or disconnects signal paths under digital control. The ISL84543CB belongs to the analog-switch hierarchy, where a multiplexer or demultiplexer is used to route signals among multiple endpoints. Its dual SPST architecture provides two independently controlled switching functions, allowing analog, test, measurement, or peripheral signals to be selected without duplicating surrounding circuitry.
The family is specified for low-voltage, single-supply operation. A 60 ohm on-resistance provides a defined path impedance for many low-frequency and moderate-impedance analog circuits, while the dual-channel construction supports compact signal routing. Operation is also identified at 3.3 V and 5 V supply levels, covering common consumer, industrial, communication, and portable-system rails.
The ISL84543CB is intended to add routing capability to systems with limited analog inputs or general-purpose I/O. Its two switch sections can be used independently, and the device is associated with drop-in replacements for MAX4541, MAX4544, and DG9263. These cross-references are important when maintaining an existing 8-SOIC layout or reducing design changes during component sourcing.
Typical uses include battery-powered test equipment, analog measurement systems, peripheral selection, signal isolation, and compact embedded interfaces. Because the device operates from a single supply, it can simplify rails in portable systems where generating additional bipolar or split-supply voltages would be undesirable.
When designing around the ISL84543CB, account for the 60 ohm path resistance and control-logic levels when interpreting signal attenuation, settling behavior, and logic compatibility. Keep routing traces short, provide a low-impedance supply connection near the device, and verify the control inputs against the voltage levels produced by the host microcontroller. Use the manufacturer pin-description table when assigning PCB tracks.
This product page consolidates the exact ordering information, verified technical characteristics, documented cross-references, and practical design guidance for engineers evaluating the ISL84543CB in compact, single-supply analog-routing designs.
直接替换替代料： ISL84543CB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX4541
✅ 直接替换📋 参考替代料（不在目录中）
MAX4544
✅ 直接替换📋 参考替代料（不在目录中）
DG9263
✅ 直接替换📋 参考替代料（不在目录中）
ISL84543CB 最大额定值与电气特性
| Device Type | Dual SPST analog switch |
| Number of Circuits | 2 circuits |
| Switch Configuration | 1:1 |
| On-Resistance | 60 ohm |
| Supply Voltage Range | +2.7 V to +12 V |
| Characterized Supply Voltage | 3.3 V and 5 V |
| 封装 | 8-pin SOIC |
| 引脚数量 | 8 pins |
| Switch Type | SPST |
| 拓扑 | Dual SPST |
| Supply Type | Single supply |
| 安装类型 | Surface mount |
| Signal Configuration | 1:1 |
ISL84543CB 8-pin soic 引脚配置指南
ISL84543CB（8-pin soic 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： ISL84543CB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ISL84543CB 适用于 6 应用s: Battery-Powered Analog Measurement, Portable Audio Signal Routing, Test and Measurement Signal Selection, Peripheral and Resource Multiplexing, Industrial Sensor Interface, Communications and RF Front-End Switching.
Battery-Powered Analog Measurement
The ISL84543CB is suitable for routing analog measurement signals in battery-powered instruments because it operates from a single +2.7 V to +12 V supply and is characterized at 3.3 V and 5 V. Its two SPST sections can independently connect a sensor, reference, or test point to a shared amplifier chain. The 60 ohm on-resistance adds a defined series impedance, so the source impedance, ADC input capacitance, and required settling time should be evaluated together. The single-supply architecture also reduces the need for a negative rail in compact portable equipment.
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Portable Audio Signal Routing
The ISL84543CB can route left- and right-channel analog signals in portable audio equipment by using its two independently controlled SPST paths. Operation at 3.3 V and 5 V supports common portable-system supply rails, while the 60 ohm on-resistance makes the switch suitable for moderate source impedances. The design should compare the switch resistance with the audio source impedance to quantify insertion loss and check the manufacturer control-input thresholds. Keep traces short and maintain a quiet return path to reduce coupling into the audio path.
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Test and Measurement Signal Selection
The ISL84543CB is appropriate for compact test-and-measurement equipment that must connect one of several external or internal signals to a shared front end. The dual SPST configuration provides two selectable paths, and the 1:1 topology avoids adding active gain to the signal path. At 60 ohm on-resistance, source impedance is the primary accuracy consideration because the switch contributes to the total loading. A design should also verify bandwidth, off-isolation, control timing, and settling behavior against the required measurement bandwidth.
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Peripheral and Resource Multiplexing
The ISL84543CB can expand analog or peripheral connectivity in embedded systems that have limited routing resources. Its two SPST channels can connect separate endpoints to shared downstream circuitry while the host controls which signal is active. The +2.7 V to +12 V single-supply range accommodates multiple low-voltage platforms, although the control logic must remain compatible with the host output levels. Because each path has 60 ohm on-resistance, avoid using the device for high-current loads or precision sensor inputs that cannot tolerate that series impedance.
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Industrial Sensor Interface
The ISL84543CB can select sensor signals in compact industrial interfaces where a single-supply design and limited routing space are important. The dual SPST structure can route two sensor branches toward a common amplifier or converter, while the 60 ohm on-resistance must be included in the sensor-source impedance budget. Industrial designs should check the selected operating-temperature grade and noise behavior for the specific deployment. Proper grounding, short analog traces, and a stable local supply connection help preserve measurement integrity.
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Communications and RF Front-End Switching
The ISL84543CB may be used for low-frequency signal routing around communications circuitry, subject to the device's bandwidth and isolation characteristics. Two controlled SPST sections can isolate or select paths between a transceiver interface and measurement or test circuitry. The 60 ohm on-resistance is suitable when the routed source has substantially lower impedance than the switch resistance. Designers should verify high-frequency insertion loss, off-isolation, supply rejection, and control timing in the manufacturer data sheet before using the part near RF carrier signals.
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推荐产品汇总
工程参考数据： ISL84543CB ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX4541 | MAX4544 | DG9263 |
|---|---|---|---|---|
| Brand | Renesas Electronics | Maxim Integrated | Maxim Integrated | onsemi |
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Drop-In Relationship | Primary device | Documented drop-in replacement | Documented drop-in replacement | Documented drop-in replacement |
关键差异点
- Exact 8-SOIC ordering code with two integrated SPST channels （对比 MAX4541)
- Single-supply operation suited to portable low-voltage systems （对比 MAX4544)
- Documented compatibility with an onsemi alternative （对比 DG9263)
设计说明
Include the 60 ohm on-resistance in the complete source-impedance calculation rather than treating the switch as a zero-ohm connection. The effective source impedance seen by the receiving circuit is approximately the driver output resistance plus 60 ohm for a closed channel. This is particularly important for high-gain sensor interfaces, where source impedance and input bias current can create offset error. Confirm that the selected amplifier or ADC can also tolerate the switching capacitance and settling behavior.
Place the ISL84543CB close to the signal source and destination to minimize trace capacitance and susceptibility to injected noise. Route analog paths away from switching-node edges and digital clocks, and use a continuous ground reference beneath the analog section. The 8-SOIC footprint should be checked against the manufacturer package drawing, including pin numbering, lead geometry, and exposed-pad requirements if any.
Do not assume that a documented drop-in replacement is electrically identical in every operating condition. Review supply range, control-input thresholds, on-resistance matching, off-isolation, switching time, and temperature limits for MAX4541, MAX4544, or DG9263 before changing the BOM. Also verify that the host control signal remains within the selected switch's logic levels at every supply condition.
Decouple the single supply close to the device with the capacitance specified by the manufacturer datasheet, and route the return current through an uninterrupted ground plane. Avoid sharing narrow supply traces between the switch and noisy loads. Because the part is intended for low-voltage systems, verify that upstream power sequencing cannot apply an excessive voltage to the control inputs or supply pins.
合规信息
The manufacturer product records do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Obtain the current manufacturer declarations before making a compliance claim.