Description
The HD 66137T is a 240-channel common driver which drives a dot matrix STN LCD panel. By changing the mode, this can be applied to 240- and 200- and 160- channel output. Through the use of a 43-V highvoltage CMOS process technology, a high-voltage drive of +21.5 V and –21.5 V, centering on VM is possible. –21.5V generated from +21.5 V with built-in switching circuit and external capacity. Low logicdrive voltage (3 V) is used. This device is used together with the segment driver HD66130, HD66134ST or HD66136.

Features
• Display duty: Up to 1/240
• LCD drive voltage: 43 V max
• Built-in switching circuit (to generate –21.5 V)
• Number of LCD drive circuit: 240
• Operating voltage: 2.5 to 5.5 V
• Intermediate voltage I/F
• Built-in alternating signal generation circuit Pin programmable
• Output mode change: 240-output mode
                                      200-output mode
                                      160-output mode
• Built-in display-off function
• Flex TCP