Overview

The LC7932, 7932M are LSIs that contain a 16-bit bidirectional shift register and are capable of direct driving a multiple lighting LED (dot matrix or dot array). The LC7932, 7932M are especially suited for use in LED display panel, PPC photosensitive drum LED erase head applications.

Features

• Silicon gate C-MOS device capable of high-speed, high current drive.

• High-speed shiftable 16-bit bidirectional shift register/16-bit latch/output control circuit/16-bit N-channel transistor open drain output transistor on chip.

• Serial shift data is shifted on the positive transition of the clock (CLOCK) pulse.

• The data latch circuit outputs input data when the latch control (LATCH) pin is at L-level and holds output data when the latch control (LATCH) pin is at H-level.

• Maximum ratings of driver output: VO = +15V, IOL = 30mA (STATIC)/120mA(DYNAMIC).

• Operating voltage of logic unit: VDD = 4.5V to 5.5V.

• Operating clock frequency: fCLK = DC to 5MHz (max).

• Package: LC7932 : DIP30S LC7932M : MFP30S

• The bidirectional shift register is so designed as to cause a shift to occur in the SI to SO direction when L/R = L level and in the SO to SI direction when L/R = H-level.

• When a high level is applied to the LSET pin (“latch set”), the latch data is set to the high level. The latch data does not change when the LSET pin is low or open.