SY69753LHG - 155Mbps 3.3V PECL CDR | Microchip
MPN: SY69753LHG ✓ AktifSY69753LHG Genel Bakış
A clock and data recovery IC is a specialized timing-device category that regenerates a synchronized clock from a serial data stream, compensates for accumulated phase and timing jitter, and supports deterministic transfer across high-speed communication links. Within the broader hierarchy, the SY69753LHG belongs to clock and timing ICs, interface ICs, and ultimately integrated semiconductors used in telecommunications and data-networking equipment.
Principal device characteristics include support for data rates of 125 Mbps and 155 Mbps, PECL input and output interfaces, one recovered output, PLL support, and a 3.3 V supply. The package combines a 7 mm by 7 mm body with an exposed pad that provides a thermal and ground connection on a multilayer PCB. Published distributor descriptions also identify the part as a surface-mount clock and timing device suitable for precise timing applications.
The SY69753LHG is intended for designs where a transmitted serial stream must be recovered into a usable clock and data pair. Its PLL-based architecture can support clock recovery and phase alignment, while the multiplexer function consolidates timing-related signal routing. The 125 Mbps operating point covers Fast Ethernet-related infrastructure, and the 155 Mbps point aligns with ATM OC-3 and 155 Mbps SONET/SDH-class interfaces. The PECL interface requires source termination, correct common-mode voltage, and controlled-impedance board layout.
Typical uses include ATM network interface equipment, SONET/SDH tributary synchronization, Fast Ethernet line-card clocking, telecommunications backplanes, and optical-transport modules. In these systems, the recovered clock reduces accumulated timing drift and provides a stable reference for downstream retimers, serializers, switching silicon, and test equipment.
When laying out a circuit around the SY69753LHG, treat the exposed pad as a primary ground and thermal connection rather than an unused package feature. Route PECL clocks and data as short, controlled-impedance nets, provide the decoupling and termination required by the device application circuit, and verify source, receiver, and multiplexer compatibility before layout release.
This page combines verified distributor specifications with an engineering-focused assessment of speed, interface type, package implementation, and replacement constraints. It also distinguishes the directly purchasable base part from a tape-and-reel ordering code and documents where complete electrical, pin-level, lifecycle, and pricing information requires confirmation.
Drop-in alternatifler için SY69753LHG — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
SY69753LHG-TR
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
SY69753LHG Özellikler
| Device Type | Clock and Data Recovery (CDR) IC with multiplexer |
| Besleme Gerilimi | 3.3 V |
| Minimum Data Rate | 125 Mbps |
| Maximum Data Rate | 155 Mbps |
| Input Interface | PECL |
| Output Interface | PECL |
| Output Count | 1 output |
| PLL | Yes |
| Primary Applications | Ethernet, SONET/SDH, and ATM OC-3 |
| Paket | 32-pin TQFP with exposed pad |
| Package Dimensions | 7 mm x 7 mm |
| Montaj Türü | Surface mount |
| İşletim Sıcaklığı Aralığı | -40 C to +85 C |
| Manufacturer | Micrel Semiconductor, now Microchip Technology |
SY69753LHG Pin Yapısı
| Pin 1 | [DATA_NEEDED: pin 1 name] — Pin function is not available in the verified excerpts |
| Pin 2 | [DATA_NEEDED: pin 2 name] — Pin function is not available in the verified excerpts |
| Pin 3 | [DATA_NEEDED: pin 3 name] — Pin function is not available in the verified excerpts |
| Pin 4 | [DATA_NEEDED: pin 4 name] — Pin function is not available in the verified excerpts |
| Pin 5 | [DATA_NEEDED: pin 5 name] — Pin function is not available in the verified excerpts |
| Pin 6 | [DATA_NEEDED: pin 6 name] — Pin function is not available in the verified excerpts |
| Pin 7 | [DATA_NEEDED: pin 7 name] — Pin function is not available in the verified excerpts |
| Pin 8 | [DATA_NEEDED: pin 8 name] — Pin function is not available in the verified excerpts |
| Pin 9 | [DATA_NEEDED: pin 9 name] — Pin function is not available in the verified excerpts |
| Pin 10 | [DATA_NEEDED: pin 10 name] — Pin function is not available in the verified excerpts |
| Pin 11 | [DATA_NEEDED: pin 11 name] — Pin function is not available in the verified excerpts |
| Pin 12 | [DATA_NEEDED: pin 12 name] — Pin function is not available in the verified excerpts |
| Pin 13 | [DATA_NEEDED: pin 13 name] — Pin function is not available in the verified excerpts |
| Pin 14 | [DATA_NEEDED: pin 14 name] — Pin function is not available in the verified excerpts |
| Pin 15 | [DATA_NEEDED: pin 15 name] — Pin function is not available in the verified excerpts |
| Pin 16 | [DATA_NEEDED: pin 16 name] — Pin function is not available in the verified excerpts |
| Pin 17 | [DATA_NEEDED: pin 17 name] — Pin function is not available in the verified excerpts |
| Pin 18 | [DATA_NEEDED: pin 18 name] — Pin function is not available in the verified excerpts |
| Pin 19 | [DATA_NEEDED: pin 19 name] — Pin function is not available in the verified excerpts |
| Pin 20 | [DATA_NEEDED: pin 20 name] — Pin function is not available in the verified excerpts |
| Pin 21 | [DATA_NEEDED: pin 21 name] — Pin function is not available in the verified excerpts |
| Pin 22 | [DATA_NEEDED: pin 22 name] — Pin function is not available in the verified excerpts |
| Pin 23 | [DATA_NEEDED: pin 23 name] — Pin function is not available in the verified excerpts |
| Pin 24 | [DATA_NEEDED: pin 24 name] — Pin function is not available in the verified excerpts |
| Pin 25 | [DATA_NEEDED: pin 25 name] — Pin function is not available in the verified excerpts |
| Pin 26 | [DATA_NEEDED: pin 26 name] — Pin function is not available in the verified excerpts |
| Pin 27 | [DATA_NEEDED: pin 27 name] — Pin function is not available in the verified excerpts |
| Pin 28 | [DATA_NEEDED: pin 28 name] — Pin function is not available in the verified excerpts |
| Pin 29 | [DATA_NEEDED: pin 29 name] — Pin function is not available in the verified excerpts |
| Pin 30 | [DATA_NEEDED: pin 30 name] — Pin function is not available in the verified excerpts |
| Pin 31 | [DATA_NEEDED: pin 31 name] — Pin function is not available in the verified excerpts |
| Pin 32 | [DATA_NEEDED: pin 32 name] — Pin function is not available in the verified excerpts |
| Pin EP | PAD — Exposed pad; connection and thermal-land details require the manufacturer package drawing |
Tipik Uygulamalar
SY69753LHG için uygundur 6 uygulamas: ATM OC-3 Line Interfaces, SONET/SDH Tributary Timing, Fast Ethernet Network Cards, Telecommunications Backplane Cards, Optical Transport Modules, Precision Timing Test Equipment.
ATM OC-3 Line Interfaces
The SY69753LHG fits 155 Mbps ATM OC-3 interface equipment because the verified specification identifies ATM OC-3 as a primary application and supports a 155 Mbps PECL data path. The CDR recovers timing from the incoming stream, while the integrated multiplexer provides timing-related signal selection for the surrounding line-card logic. Place the device beside the PECL transceiver and downstream retimer, connect its exposed pad to a solid ground plane, and keep the 155 Mbps traces short and impedance controlled. Because the device is specified at 155 Mbps rather than the 2.488 Gb/s OC-48 rate, it is appropriate for tributaries or interfaces operating at the verified 155 Mbps class.
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SONET/SDH Tributary Timing
The SY69753LHG is applicable to 155 Mbps tributary and timing sections of SONET/SDH equipment because its verified data rate reaches 155 Mbps and its PECL interfaces suit line-card clock distribution. The clock-and-data-recovery function can provide a synchronized reference for a serializer, retimer, or framer, while the PLL feature supports deterministic timing generation. The design should preserve continuous reference-clock routing and place termination close to each PECL receiver. Verify the actual SONET/SDH layer, jitter tolerance, and reference-clock requirements against the manufacturer datasheet because the distributor descriptions do not provide a complete timing budget.
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Fast Ethernet Network Cards
The SY69753LHG supports 125 Mbps-class Fast Ethernet transports, making it suitable for line cards, legacy routers, and repeater interfaces that need clock and data recovery from a PECL stream. Its verified 3.3 V operation and one recovered output suit low-power communications equipment, while the 32-TQFP exposed-pad package supports compact surface-mount construction. Position the CDR near the PECL transceiver and PHY interface to minimize trace length, then route the recovered clock to the timing-critical loads over a controlled-impedance path. The application requires confirmation that the Ethernet MAC and physical layer can accept the recovered clock and data arrangement provided by the device.
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Telecommunications Backplane Cards
The SY69753LHG can be used in telecommunications backplane cards where a 125 Mbps or 155 Mbps PECL stream must be conditioned into synchronized clock and data. Its CDR and multiplexer functions reduce the amount of external timing logic needed for a point-to-point link, while the 7 mm by 7 mm TQFP keeps the device compatible with compact multilayer board designs. The exposed pad should be stitched to the ground plane with multiple vias to provide both a low-inductance return and a thermal path. Differential timing skew, connector loss, and the backplane's allowable jitter must be analyzed together before treating this link as reliable.
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Optical Transport Modules
The SY69753LHG is appropriate for the client-side timing section of optical transport equipment operating at 155 Mbps, where an incoming PECL stream must be recovered before it reaches a serializer or forwarding engine. The device's verified 125 Mbps and 155 Mbps support covers client-rate links associated with ATM and SONET/SDH rather than the full 2.488 Gb/s line rate. The CDR should sit close to the optical transceiver and receive termination, with the recovered clock routed separately to minimize crosstalk into the data path. Confirm the optical module's interface levels, reference clock, and jitter requirements before schematic sign-off.
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Precision Timing Test Equipment
The SY69753LHG can contribute to test and measurement modules that exercise 155 Mbps PECL interfaces and require recovered clock and data for error injection, loopback, or signal-integrity analysis. Its single recovered output and clock-and-data-recovery function provide the basis for a deterministic timing path, and the 3.3 V supply simplifies integration with modern test-instrument logic. Keep the CDR close to the DUT interface, use controlled-impedance routing, and provide a low-noise reference and proper PECL termination. The supplied sources do not state jitter, lock-range, or acquisition-time limits, so those values must be confirmed from the manufacturer datasheet before defining instrument accuracy.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: SY69753LHG — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | SY69753LHG-TR |
|---|---|---|
| Package | 32-TQFP-EP (7 mm x 7 mm) | 32-TQFP-EP (7 mm x 7 mm) |
| Brand | Microchip Technology | Microchip Technology |
| Device Function | Clock and Data Recovery IC with multiplexer | Clock and Data Recovery IC with multiplexer |
| Supply Voltage | 3.3 V | 3.3 V |
| Data Rate | 125 Mbps to 155 Mbps | 125 Mbps to 155 Mbps |
| Interface | PECL input and PECL output | PECL input and PECL output |
| Output Count | 1 output | 1 output |
| PLL | Yes | Yes |
| Primary Applications | Ethernet, SONET/SDH, ATM OC-3 | Ethernet, SONET/SDH, ATM OC-3 |
| Ordering Format | SY69753LHG | Tape-and-reel ordering code |
Ana Farklılayıcılar
- Purpose-built 155 Mbps PECL clock-and-data recovery (karşılaştırma:SY69753LHG-TR)
- Integrated multiplexer and PLL in one timing device (karşılaştırma:SY69753LHG-TR)
- Confirmed telecommunications application coverage (karşılaştırma:SY69753LHG-TR)
Tasarım Notları
Route the SY69753LHG PECL clock and data nets as short, controlled-impedance traces over a continuous ground plane, and place receiver termination close to the input pins. Keep the recovered clock and data paths separated from noisy digital and power-converter routes to limit skew and crosstalk. The verified material confirms a 32-TQFP exposed-pad package but not the complete reference layout, so final impedance, termination, and via guidance must be taken from the manufacturer datasheet.
Connect the exposed pad to the recommended ground plane and use multiple thermal vias to provide both a low-inductance return and a heat-spreading path. Although the supplied distributor records do not state thermal resistance, maximum clock frequency, or acquisition time, a timing IC's switching activity and surrounding power delivery can still create localized junction heating. Validate the power and ground plane with the manufacturer's worst-case reference-clock and load conditions rather than assuming the 7 mm by 7 mm package dissipates heat without copper.
Do not treat every 155 Mbps CDR as interchangeable with the SY69753LHG. The supplied cross-reference search produced only the verified SY69753LHG-TR ordering code and no independent pin-compatible source. Check the exact numbered pins, signal directions, reference-clock requirement, PECL common-mode voltage, and multiplexer topology before using an unverified substitute. Also verify whether a system requires 125 Mbps or 155 Mbps operation because those points have different clock and acquisition characteristics.
Uyumluluk Bilgisi
The supplied sources do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Confirm current declarations with Microchip Technology using the exact orderable part number.
