No. 2169-4/11

LC7537N, 7537AN, 7537NE

Pin No.

Symbol

Description of Functions

Remarks

8(2)

35(35)

42(42)

INIT

22(20)

CE

20(16)

DI

21(17)

CLK

1(43)

23(21)

19(15)

24(22)

2(3, 7)

41(18, 30,

NC

34, 41, 44)

(19)

Main volume control block fader control common terminals. The impedance of pattern

have not been connected inside the LSI, they should be connected together on the outside

in conformance with their individual specifications. Particular attenuation should be paid to

will emerge as a residual resistive component when control is turned down for maximum

attenuation.

Intra-IC latch resetting terminal

Control-setting data at the internal latch will be indeterminate when power has just been

switched on, so that by engaging the “L” level of this pin at power-on, the fader control

may be set at its –

∞ position and muting behaviour is engaged (Note: V

Chip enable terminal. When this pin is made “H” to “L”, data is written in the internal latch,

activating the various analog switches. When the “H” level is then restored, transfer of the

data will be enabled.

Input terminals for serial data and clock that serve control purposes.

Continued from preceding page.

No connect pins. Absolutely nothing should be connected here.

LC7537AN and

LC7537NE only