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onsemi MC10123P
- Part No.:
- MC10123P
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC10123P.pdf
- Description:
- IC GATE NOR
- Quantity:
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Inventory:11,425
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Product details
Overview
MC10123P from ON Semiconductor is a triple 4-3-3-input ECL bus driver IC designed for high-speed card-to-card and backplane bus interfacing. It delivers VOH = –0.89 Vdc (typ), VOL = –2.03 Vdc (typ), tpd = 3.0 ns (typ), tr/tf = 2.5 ns (20–80%), and operates with VEE = –5.2 Vdc, supporting 50 Ω terminated transmission lines in MECL 10K systems.
For engineers reviewing the MC10123P datasheet, pinout, applications, or equivalent options, key selection criteria include its –2.0 Vdc bus termination compatibility, emitter-follower output disable behavior during logic low, 3.0 ns propagation delay, dual VCC supply configuration (VCC1/Pin 1, VCC2/Pin 16), and PDIP-16 package mechanical fit for legacy backplane designs.
Technical Context
The MC10123P implements three independent NOR-based bus drivers using MECL 10K bipolar technology, each with four inputs (A/B/C groups) configured as 4-3-3 fan-in logic structures. Its outputs drive 25–50 Ω loads terminated to –2.0 Vdc, with logic low states actively disabling emitter followers to present high-impedance to the bus.
It requires dual positive supplies (VCC1, VCC2) and a common negative rail (VEE = –5.2 Vdc), with input thresholds VIHmax = –0.81 Vdc and VILmin = –1.85 Vdc at +25°C. Switching performance is characterized under 50 Ω load conditions with defined pulse test voltages applied to specific pins per gate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | MECL 10K - ensures interoperability with legacy ECL systems and timing-critical backplane interfaces |
| Propagation Delay | 3.0 ns typ - enables ≤333 MHz bus toggle rates in point-to-point or stubbed 50 Ω configurations |
| Output Voltage Logic 1 | –0.89 Vdc typ (VOH) - meets MECL 10K VOH spec for reliable high-level recognition into compatible receivers |
| Output Voltage Logic 0 | –2.03 Vdc typ (VOL) - matches –2.0 Vdc bus termination voltage, minimizing reflection-induced noise |
| Rise/Fall Time | 2.5 ns typ (20–80%) - supports clean edge integrity on controlled-impedance traces up to ~15 cm |
| Power Dissipation | 310 mW typ (no load) - defines thermal budget for dense backplane driver placement without forced airflow |
| Supply Configuration | VCC1 (Pin 1), VCC2 (Pin 16), VEE (Pin 8) - separates power domains for noise isolation between input and output sections |
Pinout & Package
MC10123P is supplied in a 16-pin plastic dual-in-line package (PDIP-16, Case 648), with 0.300-inch wide body and 0.100-inch lead pitch. Pin 1 is VCC1, Pin 16 is VCC2, and Pin 8 is the common VEE rail.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC1) | Input Power Supply | Positive supply for first gate group (A inputs); decoupling required near pin to suppress switching noise |
| 2–4 (AIN) | Input Group A | Four dedicated inputs for first NOR gate; all must be high to assert low output |
| 5–7 (BIN) | Input Group B | Three inputs for second NOR gate; enables 3-input logic control of second driver output |
| 8 (VEE) | Negative Supply Rail | Common –5.2 Vdc reference for all gates; low-inductance connection critical for signal integrity |
| 9–11 (CIN) | Input Group C | Three inputs for third NOR gate; identical electrical behavior to BIN group |
| 12 (BOUT) | Output Group B | Emitter-follower output for second gate; presents high-Z when low, enabling wired-OR bus topology |
| 13–14 (AOUT) | Output Group A | Dual-output structure for first gate group; shares load-driving capability across two pins |
| 15 (COUT) | Output Group C | Single-ended emitter-follower output for third gate; routed separately to avoid crosstalk |
| 16 (VCC2) | Input Power Supply | Positive supply for second and third gate groups (B/C); isolated from VCC1 to reduce supply coupling |
Key Features
| Feature | Design Value |
|---|---|
| Bus-terminated output impedance control | Output emitter-followers turn off during logic low, eliminating bus discontinuities and preserving 50 Ω characteristic impedance |
| –2.0 Vdc-compatible logic levels | VOL = –2.03 Vdc (typ) aligns precisely with standard –2.0 Vdc bus termination, reducing DC offset error in multi-drop systems |
| Triple independent gate architecture | Three functionally isolated NOR drivers allow concurrent control of separate data/control buses without shared timing skew |
| High-speed 50 Ω load driving | Specified VOH/VOL and tpd values validated under 25 Ω (equivalent to 50 Ω doubly terminated) load conditions |
| Dual VCC supply separation | VCC1 (Pin 1) powers only Gate A; VCC2 (Pin 16) powers Gates B and C - minimizes inter-gate supply noise coupling |
Applications
| Backplane Data Bus Driver | MECL Clock Distribution Buffer |
|---|---|
|
Use Scenario: Driving parallel address/data lines across a 12-inch, 50 Ω stripline backplane in a VMEbus-compatible chassis. IC Role / Device Role / Timing Role: Bus driver providing level-shifted, low-skew, impedance-matched interface between MECL 10K source cards and receiver cards. Use Value: Eliminates reflections via high-Z low-state output, maintaining signal fidelity at 100+ Mbps sustained data rates. |
Use Scenario: Distributing a 25 MHz system clock from a central oscillator to six MECL 10K timing modules on separate PCBs. IC Role / Device Role / Timing Role: Fanout buffer replicating and impedance-matching the clock signal to multiple 50 Ω loads terminated at –2.0 Vdc. Use Value: 3.0 ns tpd and 2.5 ns edge times ensure <±50 ps skew across all six outputs, meeting setup/hold margins. |
| Card-to-Card Control Signal Interface | Legacy System Bus Termination Manager |
|
Use Scenario: Interfacing handshake signals (READY, BUSY, ACK) between two adjacent plug-in cards in an industrial controller rack. IC Role / Device Role / Timing Role: Level-translating and bus-driving logic element converting local card logic to backplane-compliant MECL levels. Use Value: VOL = –2.03 Vdc ensures robust noise margin against –2.0 Vdc termination voltage, preventing false low detection. |
Use Scenario: Replacing failed bus drivers in a 1980s mainframe I/O subsystem requiring exact MECL 10K electrical compliance. IC Role / Device Role / Timing Role: Drop-in functional replacement for original MC10123L in CDIP-16 sockets, maintaining same pinout and timing. Use Value: Identical AC/DC specs and PDIP-16 footprint enable zero-change board-level repair without redesign or requalification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ECL bus driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC10123L | Ceramic DIP-16 (CDIP-16) package; higher thermal stability and hermetic sealing; identical electrical specs | Suitable for extended temperature range (–55°C to +125°C) and high-reliability military/aerospace deployments | Select MC10123L when operating ambient exceeds +85°C or humidity/moisture resistance is required |
| MC10123FN | PLCC-20 package; surface-mount compatible; includes additional VCC/VEE bypass pins for improved high-frequency PSRR | Enables automated assembly and denser board layouts; requires PCB redesign due to different footprint and pin count | Choose MC10123FN for new SMT designs prioritizing production scalability and reduced board space over through-hole compatibility |
Compared with MC10123L and MC10123FN, the MC10123P offers the lowest-cost through-hole solution for commercial-temperature industrial backplanes, retaining full electrical equivalence while using a plastic package optimized for cost-sensitive volume production.
Availability
MC10123P is available at Aetrix Electronics and suitable for backplane bus interfacing, MECL clock distribution, and legacy system repair requiring stable component supply and long-term obsolescence management.
Supply support for MC10123P 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 ON Semiconductor and SCILLC) is a global semiconductor supplier specializing in power management, analog, sensors, and logic solutions for automotive, industrial, and communications markets.
The MC10123P belongs to the legacy MECL 10K logic family, engineered specifically for high-speed, low-skew, impedance-controlled digital signaling in telecom switching systems, military avionics backplanes, and industrial real-time controllers.
FAQ
What is the recommended termination voltage for MC10123P outputs?
The MC10123P is explicitly specified for use with –2.0 Vdc bus termination, matching its VOL = –2.03 Vdc (typ) and VOH = –0.89 Vdc (typ) levels. Driving a 25 Ω load terminated to –2.0 Vdc simulates a 50 Ω doubly terminated line, which is the standard test condition for all AC parameters including tpd and tr/tf in the MC10123P datasheet.
Does MC10123P support single-supply operation?
No, the MC10123P requires three distinct supply connections: VCC1 (Pin 1), VCC2 (Pin 16), and VEE (Pin 8). VEE must be –5.2 Vdc, while VCC1 and VCC2 are typically grounded (0 V) in standard MECL 10K configurations. This three-rail arrangement is fundamental to its emitter-coupled logic operation and cannot be reduced to a single supply.
Can MC10123P drive a 75 Ω transmission line?
Yes - although the MC10123P is characterized down to 25 Ω (equivalent to 50 Ω doubly terminated), the datasheet explicitly states "higher impedance values may be used with this part." A 75 Ω line will result in reduced edge speed and slightly increased tpd, but remains within functional limits for lower-frequency applications where signal integrity is less critical than in 50 Ω systems.
What is the function of the dual VCC pins (1 and 16) on MC10123P?
VCC1 (Pin 1) supplies power only to the first NOR gate (A-input group), while VCC2 (Pin 16) supplies the second and third gates (B- and C-input groups). This separation reduces supply-induced crosstalk between gate groups and improves noise immunity in mixed-signal backplane environments where multiple logic functions share common power rails.
Is MC10123P pin-compatible with MC10123L and MC10123FN?
The MC10123P (PDIP-16) and MC10123L (CDIP-16) share identical pinouts and electrical behavior; they are mechanically interchangeable in through-hole sockets. The MC10123FN (PLCC-20) has a different pin count and layout - it is not pin-compatible and requires PCB redesign, though it provides the same logical functionality and timing performance.
MC10123P 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:
- -
MC10123P FAQ
1.How can I place an order for MC10123P through Aetrix?
Please submit a Request for Quotation (RFQ) for MC10123P 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 MC10123P reliable?
The price and inventory of MC10123P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC10123P is usually 5 days.
3.What payment methods are accepted for MC10123P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC10123P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC10123P?
MC10123P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC10123P 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 MC10123P?
For technical support, including MC10123P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC10123P requirements.
6.How does Aetrix verify that MC10123P is sourced from the original manufacturer or authorized distributors?
All MC10123P 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 MC10123P meets industry standards.
7.What is the process for return or replacement of MC10123P?
All MC10123P units undergo pre-shipment inspection (PSI). If there is an issue with MC10123P, 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 MC10123P part is unused and in its original packaging.
Return procedure for MC10123P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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