LR48061

The LR48061 is a CMOS pulse/tone dialer LSI providing auto-dialing and redialing. It features a built-in 16-digit x 20-channel automatic dialing memory including a 16-digit x 5 one-touch memory and a 32-digit redial memory.The mode immediately after going on-hook or off-hook is selected by the MOD pin (Pin 3).If the MOD key is depressed in pulse mode, the rest of the dialing will be performed in tone mode.Mode key input data is stored in memory along with other data.

Features of the LR48061 are:(1)32-digit redial memory; (2)auto memory dialing:16D x 5M one-touch dialing,16D x 15M three-touch dialing; (3)make ratio:33/37% pin-selectable; (4)pulse rate:10/20 pps pin-selectable; (5)key tone output (1 kHz); (6)normal/memory combination dialing; (7)key or switch input allows switching from pulse to tone mode to provide mixed-dialing capability; (8)pulse/tone dialer operation can be selected by the pin; (9)flash signal output; (10)PBX pause storage; (11)key input control of on/off-hook setting; (12)package:28-pin SDIP (SDIP028-P-0400A).

The absolute maximum ratings of the LR48061 can be summarized as:(1)supply voltage:6.5V;(2)storage temperature:-55 to 150;(3)operating temperature:-30 to 60;(4)power dissipation:500mW;(5)pin voltage:-0.3 to +0.3V.The LR48061 has twenty 16-digit memory slots,fifteen of which can be recalled by indirect dialing, and five of which can be recalled by one-touch input through keys M,-Ms. As shown in the memory dialing example that follows, two successive memory dialing operations are allowed.What was memory dialed will be stored in buffer memory.The LR48061 provides combination dialing capability combining memory dialing and normal dialing,as shown in the following example.In combination dialing mode, normal dialing can be performed in exactly the same way as in normal dialing mode, except in those cases for which the number of input digits is limited.For continued redialing in Off-Hook mode, the HKCTL pin alternates between two states, high impedance and low level, with each ON/OFF key input during redialing. A FLASH key input stops redialing and starts the flash operation.Pauses entered in redialing can only be cleared by the REDIAL key. Any other key input will be ignored.