The UC2842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC2842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The difference between members of this family are shown in the table below.

• Extended Temperature Performance of –40°C to 125°C
• Optimized for Off-line and DC to DC Converters
• Low Start Up Current (<0.5 mA)
• Trimmed Oscillator Discharge Current
• Automatic Feed Forward Compensation
• Pulse-by-Pulse Current Limiting
• Enhanced Load Response Characteristics
• Under-Voltage Lockout With Hysteresis
• Double Pulse Suppression
• High Current Totem Pole Output
• Internally Trimmed Bandgap Reference
• 500 kHz Operation
• Low RO Error Amp

• HD3SS3411 - HD3SS3411 单通道差分 2:1 复用器/解复用器
• MAX3223-EP - 具有 +/-15Kv Esd 保护的增强型产品 3V 至 5.5V 多通道 Rs-232 线路驱动器/接收器
• SN74LVC1G3157 - 单极双闸模拟开关
• TPS62203 - 采用 SOT-23 封装的 3.3V 300mA 输出的 95% 效率步降转换器
• LM3687 - 具有集成低压降稳压器和启动模式的降压 DC-DC 转换器
• CF4320H - 具有 ESD 保护、转换和卡片检测电路的 CompactFlash 总线接口芯片
• TLV320DAC32 - Low-Power Stereo DAC with 6 Outputs, HP/Speaker Amplifier and 3D Effects
• LM12H458 - 具有自校准功能的 12 位 + 数据采集系统
• SN54LS38 - 具有集电极开路输出的四路 2 输入正与非缓冲器
• CD54HC42 - 高速 CMOS 逻辑 BCD 至十进制解码器（10 选 1）