Overview
The MC1488NG4, produced by Texas Instruments, is a monolithic quadruple line driver designed to interface data terminal equipment with data communications equipment. It conforms to the specifications of ANSI EIA/TIA-232-E and ITU Recommendation V.28. This component is part of the MC1488 family, which includes the MC1488, SN55188, and SN75188, each characterized for different temperature ranges and applications.
The MC1488NG4 is particularly useful for converting DTL/TTL logic levels to EIA-232D levels, making it a crucial component in data communication systems.
Key Specifications
| Characteristic | Min | Max | Unit | |
|---|---|---|---|---|
| Power Supply Voltage (VCC - VEE) | +7.0 to +15 | -2.5 to -15 | Vdc | |
| Input Voltage Range | -15 | 7.0 | Vdc | |
| Output Signal Voltage | ±15 | Vdc | ||
| Current-Limited Output | 10 | mA | ||
| Power-Off Output Impedance | 300 | Ω | ||
| Operating Ambient Temperature Range | 0 | 70 | °C | |
| Propagation Delay Time (tPLH, tPHL) | 275, 110 | 350, 175 | ns | |
| Rise and Fall Time (tTLH, tTHL) | 55, 45 | 100, 75 | ns |
Key Features
- Meets or exceeds the requirements of ANSI EIA/TIA-232-E and ITU Recommendation V.28.
- Current-Limited Output: 10 mA typical.
- Power-Off Output Impedance: 300 Ω minimum.
- Slew Rate Control by Load Capacitor.
- Flexible Supply-Voltage Range: VCC from +7.0 to +15 V and VEE from -2.5 to -15 V.
- Input Compatible With Most TTL Circuits.
- Pb-Free Packages are Available.
Applications
The MC1488NG4 is designed to interface data terminal equipment with data communications equipment. It is particularly useful in systems that require conversion between DTL/TTL logic levels and EIA-232D levels.
Common applications include:
- Data communication systems conforming to EIA-232D standards.
- Interface between data processing equipment and data communications equipment.
- DTL to MOS translators where output voltage needs to be clamped.
Q & A
- What is the MC1488NG4 used for?
The MC1488NG4 is used to interface data terminal equipment with data communications equipment, converting DTL/TTL logic levels to EIA-232D levels.
- What are the key specifications of the MC1488NG4?
Key specifications include a current-limited output of 10 mA, power-off output impedance of 300 Ω, and a flexible supply-voltage range.
- What temperature range does the MC1488NG4 operate in?
The MC1488NG4 operates from 0°C to 70°C.
- How does the MC1488NG4 control slew rate?
The slew rate is controlled by connecting a capacitor to each driver output.
- Is the MC1488NG4 compatible with TTL circuits?
Yes, the MC1488NG4 is input compatible with most TTL circuits.
- What are the power supply voltage ranges for the MC1488NG4?
The positive supply can vary from +7.0 V to +15 V, and the negative supply can vary from -2.5 V to -15 V.
- Can the MC1488NG4 be used in military temperature ranges?
No, the MC1488NG4 is not characterized for the full military temperature range; it is suitable for operation from 0°C to 70°C.
- What is the typical propagation delay time of the MC1488NG4?
The typical propagation delay time (tPLH, tPHL) is 350 ns and 175 ns respectively.
- Are Pb-Free packages available for the MC1488NG4?
Yes, Pb-Free packages are available for the MC1488NG4.
- How does the MC1488NG4 meet EIA-232D requirements?
The MC1488NG4 meets EIA-232D requirements by converting DTL/TTL logic levels to EIA-232D levels with one stage of inversion and controlling the output slew rate to comply with the standard.
