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Part Name: MC1489 / MC1489A – Quad Line EIA-232D Receivers onsemi+2Farnell Global+2
Package Types: DIP-14 (through-hole) and SOIC-14 (surface mount) Farnell Global+1
Manufacturer / Brands: Originally Motorola / ON Semiconductor / Texas Instruments (various sources) Texas Instruments+1
Function:
The IC provides four independent line receivers, designed to interface data terminal equipment with data communications equipment, conforming to the EIA-232D/RS-232 standard. onsemi+1
Accepts large input voltage swings (±30 V) and converts to TTL/DTL compatible outputs. Farnell Global+1
Key Specifications / Features:
Input voltage range: ±30 V max. onsemi+1
Input resistance: 3 kΩ to 7 kΩ typical. Farnell Global+1
Operates from a single +5 V supply. Sigma Electrónica+1
Built-in input threshold hysteresis and a "response control" node (for input threshold shifting / noise filtering) for each receiver. onsemi
Output load current up to ~20 mA, and supply up to 10 V absolute max for VCC. Farnell Global+1
Typical Applications:
RS-232 interface receivers in communication equipment
Converting ±V signals to TTL/CMOS logic levels
Data-terminal / data-communications interface circuitry
Important Notes:
Since it handles ±30 V input signals, it's useful where high-voltage line signalling is used (e.g., legacy RS-232 links).
The “response control” pin allows custom threshold or filtering—this can be a value-add point when designing modules.
Because the part is older/legacy, availability & sourcing may matter (ensure genuine stock).
For your listings, highlight package type (DIP vs SOIC), brand/original part number, and condition (new/unused) because older parts may have limited stock.
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| Pharetro Lorem | Pellentesque diam dolor elementum etos lobortis des mollis |
| Milancelos | Donec pretium egestas sapien et mollis |
| Pellentesque | Sedcus faucibus an sullamcorper mattis drostique des commodo pharetras |
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| Cosmopolis | Donec pretium egestas sapien et mollis |
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