Product Overview
DS1488N TTL-to-RS-232 Quad Line Driver - 14-Pin DIP, EIA-232-D, MC1488P Equivalent
Condition
Unused NOS - new old stock sourced from an electronics distributor consolidating inventory. Marked DS1488N / MC1488P with date code S+B9012. Pins are clean with no oxidation. No inclusions beyond the IC itself.
Ships same business day from Idaho. Packed carefully.
No hassle resolution if there is an issue. Serving customers since 1999.
Product Overview
National Semiconductor DS1488N - quad RS-232 line driver in a 14-pin DIP package. Converts four TTL/LS logic-level input signals to RS-232-compatible output signals compliant with EIA-232-D and CCITT V.28. A direct equivalent to the MC1488P. Bipolar device requiring a dual supply, typically ±9V to ±15V. External capacitors are required for slew rate control.
Key Features
- Four independent TTL/LS-compatible input channels
- RS-232 output compliant with EIA-232-D and CCITT V.28 / V.24 standards
- Supply voltage: ±9V to ±15V dual supply required
- Output current limit: ±10 mA typical
- Power-off source impedance: 300Ω minimum
- Operating temperature: 0°C to +75°C
- Package: 14-pin DIP - pin-compatible with DS14C88 and MC1488P
- External slew-rate capacitors required (not on-chip)
Applications
- RS-232 serial port interface between DTE and DCE equipment
- Embedded system serial communication output stage
- Industrial control systems using legacy RS-232 hardware
- Repair and replacement in older computer peripherals and terminal equipment
- Hobbyist serial communication projects and retrocomputing builds requiring TTL-to-RS-232 conversion
Frequently Asked Questions
Is the DS1488N a drop-in replacement for the MC1488P?
Yes. The DS1488N and MC1488P are pin-for-pin compatible and functionally equivalent. Both are 14-pin DIP quad RS-232 line drivers with TTL/LS-compatible inputs.
Does this work as a replacement for the DS14C88?
The DS1488N is pin-compatible with the DS14C88, but they are not identical. The DS14C88 is a CMOS version with lower power consumption and on-chip slew rate control. The DS1488N is a bipolar device and requires external capacitors for slew rate control. Verify your design requirements before substituting.
What power supply does the DS1488N require?
A dual supply is required - typically ±9V to ±15V. Single-supply operation is not supported. Verify the required voltages against your specific application before ordering.
Are any accessories or documentation included?
Not included. The listing covers the IC only.
The dual marking - DS1488N on one line, MC1488P below it - is a small piece of component history from an era when cross-referencing happened right on the package. Clean pins, solid date code, ready to translate TTL into RS-232 one more time.
