MC10EL32DTG - 5V ECL ÷2 Divider, 8-TSSOP | onsemi
料号： MC10EL32DTG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.1 | $510.00 |
| 500 | $4.4 | $2,200.00 |
| 1,000 | $3.75 | $3,750.00 |
MC10EL32DTG 概述
An ECL divider is a digital logic device that divides an input clock frequency by an integer factor (here, 2) using current-steering bipolar transistor stages. ECL devices occupy the top of the logic family hierarchy (faster than TTL/CMOS but higher power consumption), and the MC10EL32 specifically provides the high toggle rates required by telecommunications, instrumentation, and test equipment clock distribution where low phase noise and deterministic timing are paramount.
Key features include a VBB reference voltage output that allows single-ended input operation by biasing an unused differential input as a switching reference, asynchronous reset capability for initialization, and complementary differential ECL outputs. The 8-TSSOP package provides a 0.65mm pitch and compact board footprint suitable for high-density backplane designs.
Architecturally, the MC10EL32 uses differential current steering with internal emitter-follower output buffering, producing typical propagation delays under 1 ns while maintaining low output skew between Q and Q-bar. The internal VBB reference simplifies PCB design by eliminating the need for external bias networks when single-ended clocks must be AC-coupled.
Typical applications include clock synthesis in SONET/SDH telecommunications equipment, frequency counter prescalers, high-speed test and measurement instrumentation, and radar/digital IF signal processing. The PECL-compatible threshold also enables use in 3.3V LVPECL systems via level shifting.
When designing with this part, maintain 50-ohm impedance-controlled transmission lines on all ECL signal traces to preserve edge fidelity, and provide robust bypassing (0.1 µF and 0.01 µF capacitors) close to the VEE pin. Use the VBB pin only as a reference bias - it cannot source significant load current.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that supplement the manufacturer datasheet and help engineers select, source, and implement the MC10EL32DTG in high-speed clock distribution designs.
直接替换替代料： MC10EL32DTG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MC100EL32DTG
✅ 直接替换📋 参考替代料（不在目录中）
MC100LVEL32DTG
✅ 直接替换📋 参考替代料（不在目录中）
MC10EP32DTG
✅ 直接替换📋 参考替代料（不在目录中）
MC10EP32DTR2G
✅ 直接替换📋 参考替代料（不在目录中）
SY10EL32VZG
✅ 直接替换📋 参考替代料（不在目录中）
MC10EL32DTG 最大额定值与电气特性
| 功能 | Divide-by-2 Frequency Divider |
| Logic Family | ECL (Emitter-Coupled Logic), 10EL Series |
| Number of Elements | 1 |
| Bits per Element | 1 |
| 工作电源电压 | -5.0 V (ECL); +5.0 V with PECL biasing |
| VEE Supply Range | -4.2 V to -5.7 V |
| VCC Range (PECL mode) | 0 V to +5.0 V |
| 输出类型 | Differential ECL (Q, /Q) |
| Trigger Type | Positive Edge |
| Input Type | Differential Clock (CLK, /CLK) |
| Reset Pin | Asynchronous (per datasheet) |
| VBB Reference Output | Yes (internal bias for single-ended use) |
| 封装 / 外壳 | 8-TSSOP, 8-MSOP (0.118", 3.00 mm width) |
| 工作温度 | -40 °C to +85 °C |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
MC10EL32DTG 引脚配置
| 引脚 1 | CLK — Clock input (true) |
| 引脚 2 | /CLK — Complementary clock input |
| 引脚 3 | RESET — Asynchronous reset input |
| 引脚 4 | VEE — Negative supply (-5.0 V ECL) |
| 引脚 5 | /Q — Complementary divide-by-2 output |
| 引脚 6 | Q — True divide-by-2 output |
| 引脚 7 | VBB — Reference voltage output (bypass to GND with 0.01 uF) |
| 引脚 8 | VCC — Positive supply (GND for ECL, +5 V for PECL) |
典型应用
MC10EL32DTG 适用于 6 应用s: SONET/SDH Clock Synthesis, High-Speed Frequency Counter Prescaler, Test and Measurement Instrumentation, Radar and Digital IF Signal Processing, High-Speed Data Converter Clock Distribution, Fiber-Optic Transceiver Clock Generation.
SONET/SDH Clock Synthesis
The MC10EL32DTG's divide-by-2 architecture and sub-nanosecond propagation delay make it well-suited for SONET/SDH clock synthesis in telecommunications backplanes. Its 5V ECL I/O maintains the low jitter and deterministic edge timing required for OC-48/OC-192 line card prescalers. Placed between a high-frequency clock generator and downstream framer ASICs, the part provides a clean half-rate reference with complementary Q/Q-bar outputs ideal for driving differential PECL/LVPECL downstream devices. Compared to CMOS dividers, the ECL signaling eliminates the need for level shifters in 5V telecom rails.
推荐
High-Speed Frequency Counter Prescaler
In instrumentation frequency counters, the MC10EL32DTG serves as a prescaler that divides an input frequency by 2 before it enters the counter logic, extending the measurable frequency range. The ECL differential inputs accept direct AC-coupled or DC-coupled clock signals while the internal VBB reference simplifies single-ended input connections. The wide toggle frequency range and low propagation delay allow direct measurement of GHz-range signals in lab and production test equipment, eliminating the need for external down-conversion stages.
推荐
Test and Measurement Instrumentation
The MC10EL32DTG is commonly used in bench-top oscilloscopes, signal generators, and arbitrary waveform generators as a clock divider that halves reference clock rates. Its complementary ECL outputs (Q and /Q) provide convenient differential signaling for triggering downstream logic analyzers and A/D converter sample clocks. With sub-nanosecond propagation delay and matched Q/Q-bar skew, the device preserves waveform integrity critical for phase-coherent measurement applications up to multi-GHz frequencies.
推荐
Radar and Digital IF Signal Processing
In radar receiver digital-IF stages, the MC10EL32DTG halves the IF sampling clock to generate quadrature (I/Q) baseband processing rates. The 5V ECL signaling integrates directly with high-speed ADC sample-clock inputs that require low-jitter differential clocks. The differential outputs also drive matched-length PCB traces to maintain I/Q channel phase balance. The device's 8-TSSOP footprint and surface-mount construction suit dense airborne and ground-based radar receiver boards where board area is constrained.
推荐
High-Speed Data Converter Clock Distribution
The MC10EL32DTG drives sample-clock inputs of multi-GHz ADCs and DACs in software-defined radio (SDR) and digital oscilloscope front ends, where its divide-by-2 function generates lower-rate, low-jitter clock references from a higher-frequency system clock. The device's low output skew between Q and /Q maintains timing alignment critical for ENOB and SFDR performance in 12-16 bit ADC converters. The 5V ECL levels interface directly with ECL/PECL ADC clock inputs without level translation, simplifying analog front-end design.
推荐
Fiber-Optic Transceiver Clock Generation
In optical transceiver modules operating at OC-48 and OC-192 data rates, the MC10EL32DTG generates half-rate clocks from the recovered line-rate clock for serializer/deserializer (SerDes) and forward-error-correction (FEC) blocks. The part's compact 8-TSSOP package supports high-density SFP/XFP module designs, while its ECL signaling matches the small-signal differential environment used by optical module ASICs. The asynchronous reset input allows initialization in module power-up sequencing.
推荐
推荐产品汇总
工程参考数据： MC10EL32DTG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC100EL32DTG | MC100LVEL32DTG | MC10EP32DTG | MC10EP32DTR2G | SY10EL32VZG |
|---|---|---|---|---|---|---|
| Package | 8-TSSOP | 8-TSSOP - same | 8-TSSOP - same | 8-TSSOP - same | 8-TSSOP - same | 8-SOIC - similar footprint, verify land pattern |
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | Microchip Technology |
| Logic Family | 10K ECL | 100K ECL | 100K LVE (3.3 V) | 10EP PECL | 10EP PECL | 10K ECL |
| Supply Voltage | -5.0 V (ECL) | -5.0 V (ECL) | -3.3 V (LVE) | +3.3 to +5.0 V (PECL) | +3.3 to +5.0 V (PECL) | -5.0 V (ECL) |
| Function | Divide-by-2 | Divide-by-2 | Divide-by-2 | Divide-by-2 | Divide-by-2 | Divide-by-2 |
| Number of Elements | 1 | 1 | 1 | 1 | 1 | 1 |
| Reset Pin | Yes (asynchronous) | Yes (asynchronous) | Yes (asynchronous) | Yes (asynchronous) | Yes (asynchronous) | Yes (asynchronous) |
| VBB Reference Output | Yes | Yes | Yes | Yes | Yes | Yes |
关键差异点
- 10K ECL standard with internal VBB reference for single-ended input （对比 MC10EP32DTG (PECL variant))
- Compact 8-TSSOP package for high-density designs （对比 Larger 8-SOIC variants (e.g., SY10EL32VZG in SOIC-8))
- Complementary Q/Q-bar outputs with low skew （对比 Single-ended divider implementations using discrete flip-flops)
设计说明
ECL devices require clean, low-inductance supply bypassing because the high-speed current steering produces fast transient currents. Place a 0.1 µF X7R ceramic and a 0.01 µF NP0/C0G ceramic capacitor as close as possible to the VEE pin. Use a ground plane or wide power trace for VCC to minimize parasitic inductance. For PECL operation at +5 V, VCC bypass follows the same convention with capacitors tied to the local ground plane.
Maintain 50 Ω controlled-impedance transmission lines for all ECL signal traces (CLK, /CLK, Q, /Q) to preserve edge fidelity. Match trace lengths within 50 mils to minimize skew between Q and /Q. The VBB trace should be kept short and not run parallel to switching signals to avoid coupling. Use a continuous ground plane beneath the TSSOP-8 device to provide a return path for high-speed currents.
Estimated: the VBB reference output is intended only as a switching reference for the unused differential input - sourcing more than a few hundred microamps from VBB will disturb its regulated voltage. Do not use VBB to bias other circuit blocks. Also note that the ECL output levels reference VCC; terminating 50 Ω to VCC-2.0 V is standard practice for AC-coupled loads but may be simplified with a Thevenin equivalent network for DC-coupled designs.
合规信息
RoHS and lead-free compliance per onsemi product page. AEC-Q100 not applicable for this industrial/commercial-grade ECL logic part. REACH compliance status confirmed in distributor listings as of 2026-10-15.
