SY88923KC - 2.5Gbps Limiting Post Amplifier | Microchip
MPN： SY88923KC ✗ 停產SY88923KC 概覽
A limiting post amplifier is a high-speed amplifier that increases the amplitude of small received signals and limits their swing to produce logic-compatible levels. Within the optical-communications hierarchy, the SY88923KC belongs to the limiting amplifier class of high-speed amplifier ICs used after photodetectors in fiber-optic receivers. Its principal role is signal conditioning between an optical receiver front end and a PECL-capable digital logic device.
Key features include operation at data rates up to 2.5Gbps, low-noise amplification, differential PECL signal inputs, a TTL/EN input, and chatter-free loss-of-signal generation. The post amplifier can drive devices with PECL inputs while providing a separate open-collector TTL indication when the received signal falls below the selected detection level. The programmable level-detect function supports receiver supervision in optical-network equipment.
The SY88923KC operates from either 3.3V or 5V and uses a single power supply. Differential signaling reduces sensitivity to common-mode noise when routing the recovered signal through a high-speed printed circuit board. The limiting architecture is intended to provide compatible output levels while preserving operation at multi-gigabit line rates. Its small 10-MSOP package also makes it practical for compact transceiver and line-card designs.
Typical applications include 2.5Gbps fiber-optic receivers, optical network terminals, optical network units, digital cross-connect systems, and other PECL-based communication equipment. The verified source information specifically identifies the SY88922 and SY88905 as devices designed to work with the SY88923 family. These relationships can support complete receiver signal-chain designs rather than using the post amplifier as an isolated component.
When laying out the circuit, keep the differential PECL traces short, continuous, and impedance controlled, with close placement of the required bypass and termination components. Verify input common-mode voltage, output termination, loss-of-signal polarity, and enable-logic levels against the manufacturer datasheet. Because the available evidence does not provide a complete verified pin table, component tolerances, or full electrical tables, those values should be confirmed before layout release.
This product record combines the verified 2.5Gbps, 5mVp-p, 3.3V/5V, PECL, LOS, and 10-MSOP information with lifecycle status, sourcing links, and explicit engineering cautions. It also distinguishes verified functions from unverified specifications and avoids presenting generic cross-reference tools as proof of a pin-compatible replacement.
直接替換替代品，適用於 SY88923KC — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品SY88923KC 最大額定值與電氣特性
| Product Type | High-speed limiting post amplifier |
| Maximum Data Rate | 2.5 Gbps |
| Minimum Amplified Signal | 5 mVp-p |
| 供應電壓 | 3.3 V or 5 V |
| Input Signal Type | Differential PECL |
| Enable Input Type | TTL/EN |
| Loss-of-Signal Output | Chatter-free open-collector TTL |
| Power Supply Configuration | Single supply |
| 封裝 | 10-MSOP, 3.00 mm width |
| 安裝類型 | Surface mount |
| 資料速率 | Up to 2.5 Gbps |
| Input Amplitude | As low as 5 mVp-p |
| Output Interface | PECL-compatible driver |
SY88923KC 10-msop, 3.00 mm width 腳位配置指南
SY88923KC（10-msop, 3.00 mm width 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： SY88923KC.
請參閱 資料表 以查看完整腳位配置。
典型應用
SY88923KC 適用於 6 應用s: 2.5Gbps Fiber-Optic Receiver, Optical Network Terminal, Optical Network Unit, PECL Data-Path Conditioning, Digital Cross-Connect Equipment, High-Speed Transceiver Interface.
2.5Gbps Fiber-Optic Receiver
The SY88923KC fits immediately after the photodetector or recovered-data amplifier in a 2.5Gbps fiber-optic receiver because it accepts differential PECL signals as small as 5mVp-p and amplifies them into logic-compatible levels. Its limiting function supports repeatable data recovery at the specified maximum rate. The device also supplies a separate chatter-free, open-collector TTL loss-of-signal indication, allowing the receiver controller to detect an absent or inadequate input without interpreting the data output itself.
推薦
Optical Network Terminal
A compact 10-MSOP post amplifier is useful in optical network terminal line cards where board area is constrained but the recovered data path must support 2.5Gbps operation. The SY88923KC combines differential PECL inputs with a TTL enable function and a discrete loss-of-signal output, simplifying interface partitioning between high-speed logic and supervisory circuitry. The 3.3V or 5V supply choice supports both legacy and newer line-card architectures, although the complete electrical limits must be confirmed before implementation.
推薦
Optical Network Unit
The SY88923KC is appropriate for an optical network unit that recovers a high-speed data stream from a lightwave transceiver and needs deterministic loss-of-signal supervision. Signals as small as 5mVp-p can be amplified and limited, while the open-collector TTL output provides a dedicated system-health signal. Designers should place the amplifier close to the transceiver output, maintain controlled differential routing, and select suitable terminations based on the complete PECL interface specification.
推薦
PECL Data-Path Conditioning
In a PECL data-path conditioning block, the SY88923KC provides gain and limiting for weak differential signals before they reach a logic device. Its operation up to 2.5Gbps targets high-speed recovered-data channels rather than low-frequency analog amplification. The limiting architecture produces usable logic swing, while the TTL/EN input permits receiver-chain control. PCB implementation should preserve differential symmetry, minimize stub branches, and use the manufacturer's required power and termination arrangements.
推薦
Digital Cross-Connect Equipment
High-capacity digital cross-connect equipment can use the SY88923KC to condition recovered optical data before routing it into switching or framing logic. The 2.5Gbps operating rate matches legacy optical transport links, and the 10-MSOP package supports compact line-card layouts. The open-collector TTL loss-of-signal output offers a hardware-level health indication, which can be useful when the system must distinguish an inactive optical path from valid traffic during maintenance or fault isolation.
推薦
High-Speed Transceiver Interface
The SY88923KC can serve as the limiting stage between a high-speed optical transceiver's recovered output and downstream PECL logic. Its ability to amplify signals beginning at 5mVp-p addresses the attenuation and amplitude variation encountered near the receive threshold, while limiting creates a stable digital level. The TTL enable and chatter-free LOS functions improve board-level control. Exact interoperability depends on common-mode voltage, termination, timing, and pin-level confirmation from the manufacturer datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 SY88923KC — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Brand | Microchip Technology |
| Package | 10-MSOP, 3.00 mm width |
| Product Type | Limiting post amplifier |
| Maximum Data Rate | 2.5 Gbps |
| Minimum Input Signal | 5 mVp-p |
| Supply Voltage | 3.3 V or 5 V |
| Input Interface | Differential PECL |
| Enable Interface | TTL/EN |
| Loss-of-Signal Output | Chatter-free open-collector TTL |
| Lifecycle Status | Discontinued |
主要差異化特點
- Integrated high-speed receiver supervision (對比No verified drop-in alternative was identified)
- Weak-signal recovery capability (對比No verified drop-in alternative was identified)
- Flexible supply compatibility (對比No verified drop-in alternative was identified)
設計說明
Route the two PECL inputs as a controlled-impedance differential pair with symmetrical geometry and minimal stubbing. Place the device close to the recovered-data source to limit trace loss, and verify the board stack-up and termination scheme against the manufacturer's reference layout. Because the available evidence does not provide a verified pin table, confirm every connection and decoupling position from the manufacturer datasheet rather than relying on an inferred MSOP pinout.
Do not treat a generic amplifier as a drop-in substitute without checking three separate interfaces: differential PECL input common-mode range, TTL/EN logic thresholds, and loss-of-signal polarity and pull-up arrangement. The supplied cross-reference search returned no verified equivalent. Also do not infer that the -TR suffix is electrically different without manufacturer confirmation, and do not use the zero-valued pricing tiers as an indication that the discontinued device is free or readily available.
Use a single 3.3V or 5V supply selected from the complete manufacturer electrical table, and place local high-frequency bypass capacitance close to the supply and ground pins. Keep return-current paths continuous and avoid sharing a narrow ground path between the amplifier and noisy transceiver stages. Supply-current limits, capacitor values, and permitted operating combinations are not stated in the supplied evidence and must be confirmed before schematic or layout release.
合規資訊
The supplied verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The component was identified as discontinued at DigiKey in one verified PDF listing.
