NJU3754 Datasheet, PDF (1/6 Pages) New Japan Radio – 11-BIT PARALLEL TO SERIAL CONVERTER

NJU3754
PRELIMINARY
11-BIT PARALLEL TO SERIAL CONVERTER
GENERAL DESCRIPTION
The NJU3754 is an 11-bit parallel to serial converter
especially applying to MCU input port expander. It can
operate from 2.7V to 5.5V.
The NJU3754 requires only 3-port of MCU for data
transmission and realizes the effective input port
assignment.
The status of the input ports is output through a latch
circuit, a shift register and a 3-state buffer as the serial
data synchronizing with the serial clock. The hysteresis
input circuit of the serial clock terminal realizes 5MHz
and more operation.
Furthermore, pull-up resistors on chip of P0 to P10
terminals reduce external components for key-scan
circuit, etc.
PACKAGE OUTLINE
NJU3754V
FEATURES
11-Bit Parallel In Serial Out
3-line Serial Interface Output
Hysteresis Input
0.5V typ at 5V
Maximum Operating Frequency 5MHz and more
Operating Voltage
2.7 to 5.5V
C-MOS Technology
Package Outline
SSOP16
BLOCK DIAGRAM
P0
P1
P2
V_SS
V_DD
PIN CONFIGURATION
P0
1
P1
2
P2
3
P3
4
P4
5
P5
6
P6
7
VSS
8
16
VDD
15
CE
14
CLK
13
SO
12
P10
11
P9
10
P8
9
P7
SO
P9
P10
Control Circuit
CE
CLK
Ver.2004-03-15
-1-