ISL8499IRZ - Ultra-Low On-Resistance Quad SPDT Switch | Renesas
Артикул: ISL8499IRZ ✓ АктивенISL8499IRZ Обзор
An analog switch is a semiconductor device that connects or disconnects signal paths under digital control. The ISL8499IRZ family combines low ON-resistance, fast switching, low power consumption, and 1.8 V-compatible logic operation. Its low ON-resistance is intended to minimize signal attenuation and distortion when the switch is closed, while the fast switching speeds support higher-bandwidth signal routing. The bidirectional architecture allows signal flow in either direction through each selected switch path.
The principal electrical features include ultra-low ON-resistance, with manufacturer cross-reference information listing 0.24 ohm at V+ = 4.3 V and 0.26 ohm at V+ = 3.0 V. The device also has a stated ON-resistance of 0.45 ohm at V+ = 1.8 V, ON-resistance matching between channels of 0.04 ohm, and ON-resistance flatness across the signal range of 0.05 ohm. Switching timing is listed as 15 ns for turn-on and 13 ns for turn-off.
The ISL8499IRZ is designed around a low-voltage, single-supply architecture intended for battery-powered systems and other compact applications. Its specified operating temperature range is -40 C to +85 C. The 16-QFN (3 x 3) package provides a small board footprint for space-constrained designs, while the quad SPDT arrangement allows multiple independent or mutually exclusive signal connections to be controlled from a small number of control inputs.
Typical uses include portable measurement equipment, battery-operated test instruments, analog signal conditioning, communication interfaces, and compact embedded systems. In these applications, the switch can select between external signals, route a signal toward an amplifier or converter, or isolate a measurement path during a test sequence. The low ON-resistance helps preserve signal amplitude, while the fast switching performance can reduce timing overhead in repeated routing operations.
PCB implementation should follow the manufacturer pin and land-pattern guidance, paying particular attention to exposed-pad soldering and the control-logic levels. The 1.8 V-compatible control inputs allow operation from low-voltage digital systems, but the logic thresholds and supply sequencing must still be checked against the final system requirements. The short 3 x 3 mm package also requires careful placement of power and ground connections to minimize parasitic inductance and maintain clean analog signal behavior.
This product page combines the manufacturer switching characteristics, package information, cross-reference guidance, and practical design considerations for engineers evaluating the ISL8499IRZ. It is intended to support footprint compatibility checks, signal-integrity planning, sourcing decisions, and early schematic and layout reviews.
Аналоги без доработки для ISL8499IRZ — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с ISL8499IRZ (тот же форм-фактор и посадочное место) — отличается по Package, Product Type.
STG3699
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
DG2799
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ISL8499IRZ Максимальные параметры и электрические характеристики
| Product Type | Quad SPDT (Dual DPDT) analog switch |
| Number of Circuits | 4 circuits |
| Switch Configuration | 2:1 |
| Supply Voltage Range | +1.65 V to +4.5 V |
| ON-Resistance at 4.3 V | 0.24 ohm |
| ON-Resistance at 3.0 V | 0.26 ohm |
| ON-Resistance at 1.8 V | 0.45 ohm |
| ON-Resistance Matching Between Channels | 0.04 ohm |
| ON-Resistance Flatness Across Signal Range | 0.05 ohm |
| Turn-On Time | 15 ns |
| Turn-Off Time | 13 ns |
| Signal Capacitance | 212 pF |
| Low-Voltage Logic Compatibility | 1.8 V-compatible |
| Диапазон рабочих температур | -40 C to +85 C |
| Корпус | 16-QFN (3 x 3 mm) |
| Тип монтажа | Surface mount |
| Статус RoHS | RoHS |
| Power Consumption | <0.2 uW |
Руководство по цоколевке ISL8499IRZ в корпусе 16-qfn (3 x 3 mm)
Цоколевка для ISL8499IRZ (корпус 16-qfn (3 x 3 mm)). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для ISL8499IRZ.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
ISL8499IRZ подходит для 6 применениеs: Battery-Powered Measurement Equipment, Portable Analog Signal Conditioning, Low-Voltage Communication Interfaces, Automated Test Path Selection, Battery Management Signal Routing, Embedded Data Acquisition Systems.
Battery-Powered Measurement Equipment
The ISL8499IRZ fits battery-powered measurement equipment because it operates from a single +1.65 V to +4.5 V supply and uses 1.8 V-compatible control logic. Its four 2:1 switch circuits can route an input signal between test paths, external connectors, or a front end while maintaining a compact 16-QFN 3 x 3 mm footprint. The stated ON-resistance of 0.45 ohm at 1.8 V provides a defined insertion loss for low-voltage signals, while 15 ns turn-on and 13 ns turn-off times support rapid measurement routing. Confirm the complete pin assignments and exposed-pad connection in the manufacturer datasheet before finalizing a compact PCB layout.
Рекомендуется
Portable Analog Signal Conditioning
The ISL8499IRZ is suitable for portable analog signal conditioning where several low-voltage sources must be selected before amplification or conversion. Bidirectional operation allows the same routing topology to handle source selection in either signal direction, while four 2:1 circuits provide more routing flexibility than a single switch. At a 3.0 V supply, the stated ON-resistance is 0.26 ohm, helping limit attenuation in the selected path. The 16-QFN package reduces board area in handheld instruments. Validate input swing, off-state isolation, and control timing for the specific source impedance and measurement bandwidth.
Рекомендуется
Low-Voltage Communication Interfaces
The ISL8499IRZ can route low-voltage communication signals when a system requires multiple switch paths within a compact area. Its single-supply range of +1.65 V to +4.5 V suits modern embedded equipment, and the specified 13 ns turn-off and 15 ns turn-on performance can reduce dead time when a line changes state. The bidirectional switch arrangement supports flexible routing around transmit and receive paths. The 212 pF signal-capacitance characteristic should be included in edge-rate and signal-integrity analysis, especially for longer PCB traces or higher-speed interface requirements.
Рекомендуется
Automated Test Path Selection
The ISL8499IRZ supports automated test-path selection by connecting a device under test to different stimulus, response, or reference paths through four 2:1 circuits. Fast 15 ns turn-on and 13 ns turn-off timing helps reduce routing delay in repetitive test sequences, while low ON-resistance limits signal loss in the closed path. Its small 16-QFN 3 x 3 mm package allows the switch matrix to be placed near connector and fixture circuitry. During layout, keep switched-node traces compact and provide a low-impedance return path to limit coupling between adjacent channels and preserve measurement accuracy.
Рекомендуется
Battery Management Signal Routing
The ISL8499IRZ can be used in battery-management systems to route low-voltage monitor signals between a battery, protection circuitry, and a controller. Its +1.65 V to +4.5 V operating range accommodates low-energy power rails, and the manufacturer lists power consumption below 0.2 uW, supporting low-power system objectives. The 1.8 V-compatible logic inputs allow direct control from compatible embedded logic. Because the device is bidirectional, the physical signal direction can be changed without redesigning the switch topology. Verify battery transients, fault-level voltages, and control defaults against the system power requirements.
Рекомендуется
Embedded Data Acquisition Systems
The ISL8499IRZ fits compact data-acquisition systems that need to select between multiple low-voltage analog inputs. Four 2:1 circuits can be used for channel multiplexing, signal isolation, or routing around an active circuit section. The 0.24 ohm ON-resistance at 4.3 V helps minimize insertion loss when the switch operates near the upper supply limit, and the small QFN footprint preserves board area for sensors and converters. Account for the listed 212 pF capacitance when setting amplifier settling requirements, and use short, referenced analog traces to reduce susceptibility to coupling from digital control and power paths.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ISL8499IRZ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Consider the STG3699 when its electrical characteristics are a better fit for the intended signal range or timing budget, but retain the documented pin-compatibility advantage of the ISL8499 for existing layouts. Consider the DG2799 only after confirming its supply, control thresholds, exposed-pad connection, switching time, and ON-resistance against the original design. ISL8499 ordering-code suffixes identify packaging variants and should not be used as substitutes for an electrically different alternative. For any proposed replacement, verify the complete manufacturer datasheet and perform application-level signal-integrity testing before production release.
Сравнение с аналогами
| Параметр | Этот товар | STG3699 | DG2799 |
|---|---|---|---|
| Package | 16-QFN (3 x 3 mm) | 16-QFN (3 x 3 mm) | 16-QFN (3 x 3 mm) |
| Brand | Renesas Electronics | STMicroelectronics | STMicroelectronics |
Ключевые отличия
- Documented pin compatibility with both identified cross-brand replacements (против STG3699)
- Documented pin compatibility with the DG2799 (против DG2799)
- Defined low-voltage ON-resistance and fast switching performance (против DG2799)
Заметки по проектированию
Use the manufacturer land-pattern drawing for the 16-QFN 3 x 3 mm package rather than a generic QFN footprint. Confirm the exposed-pad connection in the pin table, place thermal vias only where recommended, and apply the specified solder-paste and reflow profile. Position input, output, and control pins close to their associated routes so that the switched analog nodes do not become long high-impedance antennas.
Include the listed 212 pF signal capacitance when evaluating switching transients, control-edge coupling, and downstream settling time. Keep the control traces away from sensitive switched nodes, provide a continuous ground reference beneath the package, and minimize the distance between the switch and the receiving amplifier or converter. This is especially important at low supply voltages, where the stated ON-resistance increases to 0.45 ohm at 1.8 V.
The device operates from +1.65 V to +4.5 V, so verify that the selected rail remains inside the manufacturer limits during startup, shutdown, and transient events. The manufacturer lists power consumption below 0.2 uW for the switch, but total load current also includes control inputs and external circuitry. Confirm that 1.8 V-compatible logic thresholds are adequate for the actual controller supply and noise conditions.
Do not treat the STG3699 or DG2799 as automatically interchangeable until the exposed-pad connection, every control input, supply limits, analog signal range, and timing have been checked against the target schematic. Manufacturer cross-reference information establishes pin compatibility, but production qualification still depends on the complete electrical comparison. Also avoid using the tape-and-reel ordering suffix as the basis for a functional equivalence decision.
Информация о соответствии
RoHS status is identified in the product listing information. Other compliance attributes are not specified for this ordering code.
