ISL84544CB - Dual SPST 60Ω Analog Switch | Renesas
部品番号: ISL84544CB ✓ 生産中ISL84544CB 概要
An analog switch is an electrically controlled semiconductor that connects or disconnects analog signal paths while preserving the selected voltage. The ISL84544CB belongs to the analog switch and multiplexer hierarchy within interface ICs and semiconductor signal-routing systems. Its single-supply operation supports both 3.3 V and 5 V equipment, while its dual SPST arrangement can form a 2:1 analog multiplexer for selecting between two signal sources.
According to the Renesas product information, key advantages include fully specified operation at 3.3 V and 5 V, on-resistance matching between channels below 1 ohm, maximum charge injection of 5 pC, and power consumption below 5 microwatts. Switching times are listed as 35 ns for turn-on and 25 ns for turn-off. The device also provides guaranteed break-before-make behavior and minimum 2,000 V ESD protection, which are important for preventing momentary input overlap.
The ISL84544 family is designed for precision, low-voltage analog routing. Its low power dissipation reduces loading in portable systems, and its low charge injection limits command-induced voltage disturbances in measurement and signal-conditioning circuits. The matching between channel on-resistances is particularly useful when both selected paths must present similar impedance to a following amplifier, ADC, or sensor interface.
Typical applications include battery-powered instrumentation, data-acquisition front ends, test and measurement equipment, communications interfaces, and precision sensor multiplexing. The dual SPST topology is particularly useful when two inputs must share one downstream converter or amplifier. It can also be used for sample-and-hold or signal-isolation functions when the control timing and break-before-make requirement are properly observed.
Designers should account for input and output signal amplitudes, control-logic levels, switch on-resistance, and off leakage when defining the system bandwidth. Keep sensitive routing paths short, use a defined control state during power transitions, and verify that the 2:1 configuration matches the intended schematic rather than assuming a conventional dual-SPDT pinout. The manufacturer datasheet pin-description table should be used for final PCB routing and logic assignment.
This product page combines the Renesas family specifications with package-level selection guidance, same-footprint alternatives, parameter comparisons, and practical implementation notes. These resources help engineers distinguish drop-in options from functionally similar devices and identify the electrical conditions that determine whether the ISL84544CB is suitable for a specific analog-routing design.
ドロップイン代替品: ISL84544CB — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ISL84544CB （同一形状・フットプリント） — 相違点: Package, Supply Voltage Range.
ISL84544CBZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ISL84544IBZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX4544ESA+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3232EIPWG4
✅ ドロップイン価格はお問い合わせください
データシートを見る →MAX32550-LCS+T
✅ ドロップイン価格はお問い合わせください
データシートを見る →DG9461
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG9262
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG9263
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ISL84544CB 最大定格＆電気的特性
| Device Type | 1 Circuit IC Switch, 2:1 Multiplexer |
| Switch Configuration | Dual SPST |
| Number of Channels | 2 channels |
| Number of Switches | 1 switch |
| Supply Voltage Range | +2.7 V to +12 V |
| On-Resistance | 60 ohm |
| On-Resistance Matching Between Channels | <1 ohm |
| Charge Injection | 5 pC maximum |
| Power Consumption | <5 uW |
| Leakage Current | 10 nA maximum at 85 °C |
| Turn-On Time | 35 ns |
| Turn-Off Time | 25 ns |
| Break-Before-Make | Guaranteed |
| ESD Protection | 2,000 V minimum |
| パッケージ | 8-pin SOIC |
| 実装タイプ | Surface Mount |
| Specified Supply Conditions | 3.3 V and 5 V |
| Pb-Free Availability | Available as an option |
ISL84544CB 8-pin soic ピン配置ガイド
ISL84544CB (8-pin soic パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: ISL84544CB.
詳細は データシート をご参照ください。
主な用途
ISL84544CB の用途: 6 件s: Battery-Powered Data Acquisition, Precision Sensor Multiplexing, Test and Measurement Routing, Communications Signal Routing, Audio Signal Selection, Industrial Control Signal Selection.
Battery-Powered Data Acquisition
The ISL84544CB fits battery-powered data-acquisition front ends that must select between two sensor or measurement channels while drawing very little power. Its single +2.7 V to +12 V supply range supports 3.3 V systems, and the listed power consumption below 5 microwatts reduces loading on compact batteries. The 2:1 configuration can route either input to a shared ADC channel, while the 60 ohm listed on-resistance should be included when calculating source impedance and acquisition bandwidth. The 35 ns turn-on and 25 ns turn-off times permit rapid channel selection, although system timing must respect guaranteed break-before-make operation.
おすすめ
Precision Sensor Multiplexing
The ISL84544CB is suitable for selecting one of two low-frequency sensor outputs before amplification or conversion. Its on-resistance matching below 1 ohm helps both paths present similar loading to the following circuit, while maximum charge injection of 5 pC limits voltage disturbance when the control state changes. The 10 nA maximum leakage at 85 °C is useful in high-impedance sensor circuits. Designers should still verify the actual signal amplitude, source impedance, settling time, and control-logic levels, particularly when the sensor output can remain above the selected supply rail.
おすすめ
Test and Measurement Routing
The ISL84544CB can route two test signals through a shared measurement path in compact instrumentation. Fast 35 ns turn-on and 25 ns turn-off characteristics reduce dead time during automated selection, and guaranteed break-before-make operation prevents the two sources from being connected together during a transition. Its 8-pin SOIC package supports conventional surface-mount assembly, while power consumption below 5 microwatts is advantageous in portable test equipment. The 60 ohm listed on-resistance must be considered when driving high-impedance inputs, and long PCB traces should be avoided to minimize added capacitance.
おすすめ
Communications Signal Routing
The ISL84544CB can support channel selection in low-voltage communications equipment where two analog paths feed a common downstream block. Operation from +2.7 V to +12 V supports both 3.3 V and 5 V system rails, while the low-power specification is useful in line-powered and portable equipment. The guaranteed break-before-make characteristic helps prevent source contention during state transitions. High-frequency designs require checking the switch capacitance and bandwidth against the trace and load impedances, because the stated 35 ns and 25 ns timing values do not by themselves define insertion loss.
おすすめ
Audio Signal Selection
The ISL84544CB can select between two audio or control signals before they enter a converter, provided the signal amplitudes and bandwidth remain within the switch's operating limits. Maximum charge injection of 5 pC helps reduce control-state transients, and less than 1 ohm on-resistance matching helps maintain similar channel impedance. The low 5 pC specification should be compared with the receiving circuit's sensitivity to glitches, and care is required when the source is high impedance. Firmware or hardware control must also honor break-before-make sequencing to avoid simultaneously connecting the two sources.
おすすめ
Industrial Control Signal Selection
The ISL84544CB is applicable to industrial control boards that must route one of two low-level analog signals to a shared controller input. Its +2.7 V to +12 V operating range supports common control rails, and its guaranteed minimum 2,000 V ESD protection adds device-level robustness around external interfaces. Low power consumption and an 8-pin SOIC package simplify compact control assemblies. Protection networks should still be designed for the board's actual ESD and surge environment, while control logic must maintain valid states during reset. The switch's 60 ohm listed on-resistance must be compared with the controller input impedance and required settling behavior.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ISL84544CB — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ISL84544CBZ | ISL84544IBZ | MAX4544ESA+ | MAX323 | MAX325 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Analog Devices | Analog Devices | Analog Devices |
主な差別化要因
- Broad single-supply operating range （vs MAX4544ESA+)
- Low switching disturbance （vs MAX323)
- Fast transition performance （vs MAX325)
- Low power and matched channel resistance （vs DG9461)
- Guaranteed transition sequencing （vs DG9262)
設計ノート
Route the analog nodes as short and direct as practical, especially when the selected source has high impedance. Place the ISL84544CB near the connection between the two input sources and the shared downstream device so that PCB capacitance and leakage do not add materially to the source impedance. Follow the manufacturer land pattern for the 8-pin SOIC and preserve the pin orientation shown in the package drawing. Verify the exact pin functions against the datasheet rather than deriving them from a visually similar multiplexer.
Do not connect two externally driven signals simultaneously. Although the device is specified for 2:1 multiplexing and guarantees break-before-make, the control system must still issue a valid state during startup and reset. The 60 ohm listed on-resistance can reduce bandwidth when driving a high-impedance or capacitive load, and the 5 pC maximum charge injection can create a transient on a sensitive receiver. Include switch resistance and settling behavior in the signal-chain error budget.
For fast or low-impedance signals, evaluate the complete switch-plus-PCB path rather than using the 35 ns turn-on and 25 ns turn-off values as bandwidth specifications. Include switch capacitance, routing capacitance, source impedance, load impedance, and receiver input capacitance. Keep the common output path short and use a suitable return path to minimize coupling. If glitch energy is critical, place the switch where charge injection is less harmful or add filtering appropriate to the measured response.
Operate the ISL84544CB from a supply within +2.7 V to +12 V and ensure all switch and control voltages remain within their permitted limits. The low power consumption of less than 5 microwatts minimizes self-heating, but input and output signals must also remain within the device's analog operating range. Check upstream supply sequencing because an undefined control state during power ramp can create an unintended connection even if normal-state break-before-make behavior is guaranteed.
コンプライアンス情報
The manufacturer information states that a Pb-free option is available, but it does not explicitly establish the complete RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals status of this exact orderable MPN.