ICS542M - 156 MHz 1:2 Clock Divider | Renesas | SOIC-8
Référence : ICS542M ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
ICS542M Présentation
A clock divider is a timing IC that derives one or more lower-frequency or phase-related clock signals from an input reference. Within the broader clock and timing hierarchy, the ICS542M belongs to the clock-buffer, clock-distribution, and clock-divider category. This functionality is useful when a subsystem needs a divided reference clock, multiple outputs for parallel logic, or a lower-frequency signal generated without adding a separate oscillator and PLL.
Key verified specifications include a maximum frequency of 156 MHz, a 1:2 output configuration, CMOS inputs, CMOS three-state outputs, and a 3 V to 5.5 V supply range. The listed divider ratios permit useful choices for digital clocking, data converters, communications modules, and embedded systems. The package designation is 8-SOIC with a stated width of 0.154 inches, or 3.90 mm.
The ICS542M combines clock division and distribution in one device. The divide control selects the relationship between the input clock and the generated outputs, while the fanout section supports distribution to two destinations. This integration can reduce the number of separate timing components required when only one of the available divide ratios is needed. Because the verified product information does not include detailed propagation-delay, output-duty-cycle, rise-time, fall-time, or jitter values, those characteristics should be checked in the current Renesas datasheet before high-speed timing closure.
Typical uses include clock distribution for digital logic, generating a divided reference for data-acquisition systems, supporting communications equipment, and producing deterministic clocks in embedded control platforms. The 156 MHz ceiling accommodates demanding CMOS clock trees, but actual system operation must account for supply voltage, temperature, load capacitance, and the selected divider ratio.
For layout, place the device close to the clock source and receiving circuits to minimize trace length and propagation-delay variation. Keep output traces short, provide the decoupling specified by the manufacturer datasheet, and use controlled-impedance routing when outputs drive longer PCB traces. Verify unused-output state, enable or three-state behavior, and rise/fall-time requirements in the system timing budget.
This page consolidates the verified Renesas and distributor information, lifecycle evidence, practical clock-tree design guidance, and a transparent comparison of parameter gaps. It also distinguishes confirmed electrical facts from unverified details rather than inferring missing timing values or assuming drop-in alternatives where the supplied cross-reference data does not prove compatibility.
Alternatives de remplacement direct pour ICS542M — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ICS542M
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Voir la fiche technique →ICS542
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ICS542C
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ICS542P
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ICS542T
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ICS542M Spécifications
| Device Type | Clock fanout buffer and divider IC |
| Maximum Input Frequency | 156 MHz |
| Configuration de sortie | 1:2 |
| Available Divide Ratios | 2, 4, 6, 8, 12, or 16 |
| Input Logic | CMOS |
| Output Logic | 3-State CMOS |
| Supply Voltage Range | 3 V to 5.5 V |
| Boîtier | 8-SOIC, 0.154 inch (3.90 mm) width |
| Type de montage | Surface Mount |
| Catégorie | Clock/Timing, Clock Buffer and Driver |
| Statut du cycle de vie | Obsolete |
Guide de configuration des broches du ICS542M 8-soic, 0.154 inch (3.90 mm) width
Configuration des broches du ICS542M (boîtier 8-soic, 0.154 inch (3.90 mm) width). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour ICS542M.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ICS542M convient pour 6 applications: Digital Logic Clock Distribution, Data Acquisition and Converter Clocks, Communications Equipment Clocking, Embedded Control and Processor Clocking, Test and Measurement Instrumentation, Industrial Control and Automation.
Digital Logic Clock Distribution
The ICS542M is appropriate when a digital subsystem needs two clock destinations derived from one source. Its verified 1:2 fanout function supports parallel clock routing, while selectable division by 2, 4, 6, 8, 12, or 16 provides flexibility when downstream logic cannot operate at the source frequency. The 156 MHz input ceiling covers high-speed CMOS clock trees, and the 3 V to 5.5 V supply range supports both 3.3 V and 5 V systems. Place the device close to the source and receivers, keep traces short, and use the manufacturer-recommended bypass capacitor. Because detailed jitter, edge-rate, and propagation-delay values were not supplied, verify the timing margin against the actual receiver requirements before release.
Recommandé
Data Acquisition and Converter Clocks
The ICS542M can provide a divided reference for data-acquisition, sampling, or converter subsystems that do not require the full input clock. Selecting divide-by-2 through divide-by-16 allows the same source clock to be adapted to multiple sampling domains without a dedicated divider per function. Its 156 MHz maximum input frequency is suitable for demanding CMOS timing environments, while the two outputs can feed related processing paths. The 3 V to 5.5 V operating range is useful across mixed-voltage systems, although supply decoupling and level compatibility must be checked carefully. Designers should confirm output jitter, duty-cycle distortion, and the exact control truth table in the current Renesas datasheet because those values are not available in the supplied search excerpts.
Recommandé
Communications Equipment Clocking
The ICS542M fits legacy communications equipment that needs one clock reference distributed to two destinations and, when necessary, reduced by a selectable integer ratio. The 1:2 fanout can feed separate digital sections, while division by 2, 4, 6, 8, 12, or 16 supports lower-rate processing or serialization domains. Its CMOS interface and 3 V to 5.5 V supply range align with common equipment rails. Practical implementation should minimize trace length, provide local supply bypassing, and confirm that any three-state output control in the system matches the device's intended operating state. For communications timing, compare additive jitter and edge distortion against the receiver's budget; those detailed characteristics remain unverified in the supplied material.
Recommandé
Embedded Control and Processor Clocking
The ICS542M can organize clock distribution around an embedded controller that requires related but divided clocks for peripherals, sampling logic, or bus activity. Instead of deriving each clock independently, the device provides a controlled ratio from one input and fans it out to two outputs. The 156 MHz input limit, 3 V to 5.5 V supply range, and 8-SOIC package make it practical for many legacy embedded boards. Because the lifecycle status is reported obsolete, it is best suited to repair and continuation of proven designs. Verify the controller's allowable input frequency, duty-cycle tolerance, and startup behavior, and preserve the original decoupling and output-loading conditions during any drop-in replacement evaluation.
Recommandé
Test and Measurement Instrumentation
In test and measurement equipment, the ICS542M can create a known divided-clock relationship from a common reference and distribute that clock to acquisition, triggering, or processing circuits. The available ratios of 2, 4, 6, 8, 12, and 16 provide useful clock subdivisions without requiring an oscillator for each frequency. Two outputs support parallel routing, while the 156 MHz input capability accommodates common CMOS source rates. The implementation must account for deterministic edge quality, output loading, and the timing relationship between the distributed outputs. Use short, properly referenced traces and verify the output divider truth table before relying on a particular ratio. The reported obsolete lifecycle requires additional sourcing vigilance for long-lived instrumentation platforms.
Recommandé
Industrial Control and Automation
The ICS542M can support legacy industrial automation electronics that distribute a master clock to control, acquisition, or communication modules and occasionally require a divided derivative. The 1:2 configuration allows one source to serve two destinations, while ratios through divide-by-16 accommodate lower-speed subsystems. Its 3 V to 5.5 V operating range covers common industrial logic rails, and the surface-mount 8-SOIC package supports compact board layouts. Industrial designs must account for temperature range, supply transients, EMI, and long-term component availability; the supplied excerpts do not confirm an industrial temperature grade or transient rating. For new equipment, choose a lifecycle-active device with fully verified timing data, while using the ICS542M primarily for maintenance of established platforms.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ICS542M — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ICS542M | ICS542 | ICS542C | ICS542P | ICS542T |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 8-SOIC, 0.154 inch (3.90 mm) width | 8-SOIC - same | 8-SOIC - same family indication | 8-SOIC - same family indication | 8-SOIC - same family indication | 8-SOIC - same family indication |
Principaux différenciateurs
- Integrated divider and fanout function (vs Generic 1:2 clock buffer)
- High input-frequency capability (vs ICS542)
- Dual-voltage CMOS operation (vs ICS542C)
Notes de conception
Keep the input and output clock routes short and reference the ground plane continuously. The ICS542M can operate to 156 MHz, so trace length, loading, and return-path discontinuities can affect edge rate and timing relationship. Route both outputs symmetrically when their relationship matters, avoid stubs, and place the device close to the source. The supplied excerpts do not provide rise-time or jitter limits, so validate the final topology with the actual receiver, load, and PCB stack-up.
Follow the decoupling and input/output capacitance guidance in the current Renesas 542 datasheet. Place the required bypass capacitor adjacent to the supply and ground pins, provide a low-impedance ground connection, and avoid routing the clock over split planes or noisy switching nodes. Because the exact pin names and recommended capacitor values are absent from the supplied excerpts, do not substitute values based on generic clock-buffer practice; use the controlled manufacturer document.
Do not treat a generic 1:2 clock buffer as a drop-in replacement for the ICS542M. A valid substitute must support the 8-SOIC footprint, the same divider-control truth table, divide ratios of 2, 4, 6, 8, 12, and 16, compatible three-state control, the 3 V to 5.5 V supply range, and acceptable timing at the system frequency. Verify output-state requirements and startup behavior as well as steady-state timing before substituting a part.
Design the supply around the actual system rail and confirm input thresholds, output levels, and timing at that voltage. The verified 3 V to 5.5 V range is necessary but not sufficient for reliable operation. Check source impedance and bypass placement under worst-case frequency and output-load conditions, and account for shared-rail noise from nearby switching converters. No operating-current figure was supplied, so rail sizing requires the manufacturer data rather than an estimate.
Informations de conformité
The supplied excerpts identify the Renesas manufacturer, 542 datasheet, 8-SOIC package, and obsolete status, but they do not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is not applicable because this is a general-purpose clock and timing IC rather than an automotive-qualified part.
