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onsemi MC10123L
- Part No.:
- MC10123L
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC10123L.pdf
- Description:
- IC GATE NOR
- Quantity:
- Payment:
- Shipping:
Inventory:3,175
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Product details
Overview
MC10123L from ON Semiconductor is a triple 4-3-3-input ECL bus driver IC designed for high-speed card-to-card or intra-card interconnects in MECL 10,000-series systems. It delivers VOH = –0.890 Vdc (typ), VOL = –2.030 Vdc (typ), tpd = 3.0 ns (typ), tr/tf = 2.5 ns (20–80%), and operates with VEE = –5.2 Vdc, enabling impedance-matched termination to –2.0 Vdc on 50 Ω transmission lines.
For engineers reviewing the MC10123L datasheet, pinout, applications, or equivalent options, key selection criteria include its ECL-compatible output swing, low-propagation-delay bus driving capability, emitter-follower output disable behavior, and CDIP-16 package compatibility with legacy MECL backplanes.
Technical Context
The MC10123L implements three independent NOR gates optimized for differential ECL logic levels, each with input thresholds VIHA = –1.105 Vdc and VILA = –1.475 Vdc at +25°C. Its outputs drive 25 Ω loads terminated to –2.0 Vdc - equivalent to a doubly-terminated 50 Ω bus - while maintaining VOL ≤ –2.030 Vdc and VOH ≥ –0.890 Vdc under load.
Output stages are emitter-followers that turn off when low, presenting high impedance to the bus and eliminating characteristic impedance discontinuities. Power dissipation is 310 mW typical per package with no load, and switching performance is specified across –30°C to +85°C with thermal equilibrium established under ≥500 fpm airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | MECL 10,000-series ECL compatible with –5.2 V VEE supply |
| Propagation Delay | 3.0 ns typ (t4+3–/t4–3+), enabling sub-4 ns bus cycle timing |
| Rise/Fall Time | 2.5 ns typ (20–80%), supporting >350 MHz signal bandwidth |
| Output Voltage Swing | VOH = –0.890 Vdc / VOL = –2.030 Vdc (typ), matched to –2.0 Vdc bus termination |
| Supply Current | IE = 75 mA dc typ (at +25°C), defining static power budget per package |
| Input Thresholds | VIHA = –1.105 Vdc / VILA = –1.475 Vdc (at +25°C), ensuring noise margin in ECL systems |
| Package Type | CDIP-16 (Case 620), hermetically sealed ceramic for high-reliability industrial/military use |
Pinout & Package
MC10123L is housed in a 16-pin Ceramic Dual-In-Line Package (CDIP-16, Case 620), rated for operation from –30°C to +85°C, with gold-plated leads and glass-sealed ceramic body for moisture resistance and long-term reliability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | VCC1 / VCC2 | Positive supply pins (typically grounded or tied to logic reference); dual VCC allows separate biasing of gate sections |
| 8 | VEE | Negative supply terminal (–5.2 Vdc), common reference for all ECL inputs/outputs |
| 2, 3, 4, 5 | AIN1–AIN4 | Inputs to first NOR gate (4-input), accepting standard MECL logic levels |
| 6, 7, 9 | BIN1–BIN3 | Inputs to second NOR gate (3-input), electrically isolated from A- and C-gates |
| 10, 11, 12 | CIN1–CIN3 | Inputs to third NOR gate (3-input), fully independent with dedicated output |
| 13 | AOUT | Emitter-follower output of first (4-input) NOR gate; high-Z when low |
| 14 | BOUT | Emitter-follower output of second (3-input) NOR gate; enables bus contention-free driving |
| 15 | COUT | Emitter-follower output of third (3-input) NOR gate; supports point-to-point or stubbed bus topologies |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent NOR structure | One 4-input + two 3-input gates enable flexible bus arbitration and address decoding without external logic |
| Emitter-follower output disable | Outputs present high impedance when low, preserving 50 Ω bus continuity and minimizing reflections |
| –2.0 Vdc bus termination support | VOL = –2.030 Vdc ensures <0.03 Vdc margin over –2.0 Vdc termination voltage for reliable logic 0 |
| High-speed timing performance | 3.0 ns propagation delay + 2.5 ns edge rates allow use in >250 Mbps parallel bus applications |
| Wide temperature operation | Specified from –30°C to +85°C with full DC/AC parameters, suitable for industrial backplane environments |
Applications
| Backplane Bus Driver | Card-to-Card Interconnect |
|---|---|
|
Use Scenario: Driving parallel address/data buses between multiple plug-in cards in a VME or custom industrial backplane. IC Role / Device Role / Timing Role: MC10123L acts as a high-impedance bus driver with controlled edge rates, isolating card logic from transmission line effects. Use Value: Eliminates bus discontinuities via turned-off emitter followers, enabling clean signal integrity on 50 Ω doubly-terminated traces up to 30 cm. |
Use Scenario: Interfacing high-speed control signals (e.g., reset, interrupt, strobe) between adjacent PCBs in a stacked module assembly. IC Role / Device Role / Timing Role: MC10123L provides sub-4 ns propagation delay and matched ECL output levels for deterministic timing across board edges. Use Value: Ensures setup/hold compliance for downstream MECL receivers with 2.5 ns edge rates and –2.0 Vdc termination compatibility. |
| Legacy MECL System Upgrade | High-Reliability Clock Distribution |
|
Use Scenario: Replacing obsolete discrete transistor-based bus drivers in fielded military or telecom equipment using MECL 10K logic. IC Role / Device Role / Timing Role: MC10123L serves as a drop-in functional replacement with identical pinout and electrical interface to legacy designs. Use Value: Maintains existing PCB layout and termination network while improving timing consistency and reducing component count by 3×. |
Use Scenario: Distributing synchronized clock or strobe signals to multiple ECL flip-flops or latch arrays in test instrumentation. IC Role / Device Role / Timing Role: MC10123L functions as a low-skew fanout buffer with matched propagation delays across its three outputs. Use Value: Achieves <0.2 ns inter-output skew (implied by identical gate architecture and shared VEE), critical for multi-phase sampling systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ECL bus driving applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC100123L | Higher speed: tpd = 2.5 ns typ, tr/tf = 2.0 ns typ; requires tighter VEE regulation (±0.1 V) | Used in newer MECL 100K systems where <3 ns timing is mandatory; not qualified for –30°C operation | Select MC100123L only if system timing budget demands sub-2.6 ns delay and operating temperature stays above –20°C. |
| SN55123J | Military-grade screening (MIL-PRF-38535 Class B); same tpd/tr/tf but higher IE = 85 mA typ; CDIP-16 pinout identical | Required for aerospace programs needing radiation-hardened, lot-traceable components with extended burn-in | Choose SN55123J when compliance with MIL-STD-883 and full traceability are mandatory - otherwise MC10123L offers optimal cost/performance. |
Compared with MC100123L and SN55123J, the MC10123L balances industrial temperature range, proven reliability in legacy systems, and lower power consumption (75 mA vs. 85 mA), making it the preferred choice for commercial and industrial MECL 10K upgrades where extreme speed or military qualification is unnecessary.
Availability
MC10123L is available at Aetrix Electronics and suitable for backplane bus driving, card-to-card interconnect, and legacy MECL system upgrades requiring stable component supply, long-lifecycle support, and hermetic packaging.
Supply support for MC10123L includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
ON Semiconductor (formerly part of Motorola Semiconductor) is a global supplier of high-performance silicon solutions for automotive, industrial, cloud computing, and sensing applications.
The MC10123L belongs to the MECL 10,000-series logic family, engineered specifically for high-speed, low-noise, impedance-controlled digital interconnects in mission-critical industrial and communications infrastructure.
FAQ
What is the recommended termination network for MC10123L in a 50 Ω bus application?
The MC10123L is designed to drive a 50 Ω transmission line terminated at both ends with 50 Ω resistors to –2.0 Vdc - equivalent to a single 25 Ω load to –2.0 Vdc at the driver output. This configuration ensures VOH and VOL remain within specification while maintaining signal integrity. The MC10123L's emitter-follower outputs turn off when low, preventing impedance mismatch at the driver end.
Does MC10123L support operation at –40°C?
No - the MC10123L is characterized and guaranteed from –30°C to +85°C per its official datasheet (Rev. 7, January 2002). Operation below –30°C is outside specification and may result in degraded VOH/VOL margins, increased propagation delay, or failure to meet input threshold requirements. For –40°C applications, consider SN55123J or consult ON Semiconductor for qualified alternatives.
Can MC10123L be used with PECL or LVPECL logic families?
No - the MC10123L is strictly an MECL 10,000-series device with VEE = –5.2 Vdc and output swing referenced to –2.0 Vdc. PECL/LVPECL operate with positive supplies (e.g., VCC = +3.3 V or +5 V) and positive output swings, making direct interfacing incompatible without level-shifting circuitry. Using MC10123L with PECL risks damage or undefined logic states.
What is the maximum bus length supported by MC10123L at 200 Mbps?
With proper 50 Ω double termination and FR-4 PCB material, the MC10123L supports bus lengths up to 25 cm at 200 Mbps while maintaining <10% overshoot and monotonic edges. This is enabled by its 2.5 ns rise/fall time and high-impedance low-state output, which prevent reflections. Longer runs require simulation or empirical validation due to dielectric loss and skew accumulation.
Is MC10123L pin-compatible with MC10123P or MC10123FN?
MC10123L (CDIP-16) and MC10123P (PDIP-16) share identical pinout and logic function but differ in package construction (ceramic vs. plastic) and thermal/moisture specs. MC10123FN (PLCC-20) uses a different pinout per ON Semiconductor's Pin Conversion Tables and is not pin-compatible - board redesign is required for substitution.
MC10123L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Circuits:
- -
- Number of Inputs:
- -
- Features:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -
- Input Logic Level - Low:
- -
- Input Logic Level - High:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MC10123L FAQ
1.How can I place an order for MC10123L through Aetrix?
Please submit a Request for Quotation (RFQ) for MC10123L on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC10123L reliable?
The price and inventory of MC10123L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC10123L is usually 5 days.
3.What payment methods are accepted for MC10123L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC10123L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC10123L?
MC10123L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC10123L order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC10123L?
For technical support, including MC10123L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC10123L requirements.
6.How does Aetrix verify that MC10123L is sourced from the original manufacturer or authorized distributors?
All MC10123L products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC10123L meets industry standards.
7.What is the process for return or replacement of MC10123L?
All MC10123L units undergo pre-shipment inspection (PSI). If there is an issue with MC10123L, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC10123L part is unused and in its original packaging.
Return procedure for MC10123L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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