W91640

The W91640 series are Si-gate CMOS IC tone/pluse switchable dialers that include a 16-digit*5 one-touch memory and a 32-digit save or mercury memory. The W91640 also provide key, flash, handfree and redial functions. It is available in 22-pin plastic DIP package.

Here are some features about W91640: (1)use 3.579545 MHz crystal or ceramic resonator; (2)on-chip power-on reset; (3)minimun intertone pause; (4)minimum tone output duration; (5)mixed dialing, cascade dialing allowed.

What comes next is about its absolute maximum ratings of W91640: (1)DC supply voltage: -0.3 V to 7.0; (2)input/output voltage: VSS-0.3 V; (3)power dissipation: 120 mW; (4)ambient operating temperature: -20 to 70 ; (5)storage temperature: -55 to 125 . Then is about DC characteristics(Ta=25 , Fosc=3.58 MHZ): (1)operating voltage: 2.0 V to 5.5 V; (2)operating current: 0.5 mA typ and 1.0 mA max; (3)standby current: 15 A min; (4)memory retention current: 0.2 A; (5)DTMF output voltage(RL=5 K): 130 Vrms min, 150 Vrms typ and 170 Vrms max; (6)DTMF sink current(VTO=0.5 V): 0.5 mA.