NJU3712M

NJU3712 8-BIT SERIAL TO PARALLEL CONVERTER PACKAGE OUTLINE GENERAL DESCRIPTION The NJU3712 is an 8-bit serial to parallel converter especially applying to MPU outport expander. It can operate from 4.5V to 5.5V. The effective outport assignment of MPU is available as the connection between NJU3712 and MPU using only 4 lines. The serial data synchronizing with 5MHz or more NJU3712M NJU3712D clock can be input to the serial data input terminal and the data are output from parallel output buffer through serial in parallel out shift register and parallel data latches. Furthermore, the NJU3712 outputs the serial data from SO terminal through the shift register. Therefore, it connects with other SIPO ICs like as NJU3711 in cascade for expanding the parallel conversion outputs. The hysteresis input circuit realizes wide noise margin and the high drive-ability output buffer (25mA) can drive LED directly. PIN CONFIGURATION FEATURES 8-Bit Serial In Parallel Out V 1 16 DD P3 Cascade Connection P4 2 15 P2 Hysteresis Input 0.5V typ 3 14 P1 P5 Operating Voltage 4.5 to 5.5V V 4 13 V SS SS Maximum Operating Frequency 5MHz 12 CLR P6 5 Output Current 25mA P7 6 11 STB P8 CLK 7 10 C-MOS Technology DATA SO 8 9 Package Outline DIP16 / DMP16 NJU3712D/M BLOCK DIAGRAM P1 DATA P2 CLK P3 P7 P8 SO STB Controller Circuit CLR Ver.2017-12-07 - 1 - Shift Register Latch Circuit NJU3712 TERMINAL DESCRIPTION No. SYMBOL I/O FUNCTION 1 P3 O 2 P4 O Parallel Conversion Data Output Terminals 3 P5 O 4 V - GND SS 5 P6 O 6 P7 O Parallel Conversion Data Output Terminals 7 P8 O 8 SO O Serial Data Output Terminal 9 DATA I Serial Data Input Terminal 10 CLK I Clock Signal Input Terminal 11 STB I Strobe Signal Input Terminal 12 CLR I Clear Signal Input Terminal 13 V - GND SS 14 P1 O Parallel Conversion Data Output Terminals 15 P2 O 16 V - Power Supply Terminal (4.5 to 5.5V) DD Ver.2017-12-07 - 2 -