M66242P Datasheet, PDF (1/10 Pages) Mitsubishi Electric Semiconductor – 4-CH 12-BIT PWM GENERATOR

MITMSITUSBUISBHISI H〈DI I〈GDIITGAITLAALSASSPS〉 P〉
M662M4626P24/2FPP/FP
4-C4H-C1H2-1B2IT-BPITWPMWGMEGNEERNAETROARTOR
DESCRIPTION
M66242 Integrated Circuit has four 12-bit PWM (pulse width
modulation) circuits which are built by using the CMOS
(complementary metal oxide semiconductor) process.
This IC controls PWM waveform by adjusting the “H” width
according to serial data sent from MCU (micro controller unit)
or other device. Each channel can be independently con-
trolled.
High-resolution digital-analog converter can be formed eas-
ily by connecting a low-pass filter circuit to the output pins of
this circuit.
FEATURES
• Built-in four 12-bit high-resolution pulse width modulation
circuits
• Easy digital-analog conversion – Quick output waveform
smoothing
Control by 1.22mV possible per step (VCC =5V)
• Serial data input
• “H” level width setting type
• 4 independently controlled channels
• All 4 channels reset by reset input (R) High-impedance sta-
tus after reset
• All 4 channels controlled by output control input (OC)
• Settings take effect after ongoing cycle is completed
• Input: TTL level
• Output: CMOS 3-state output
Output current IO = ±4mA
• VCC =5V ± 10%
BLOCK DIAGRAM (EACH CHANNEL)
PIN CONFIGURATION (TOP VIEW)
CHIP SELECT CS 1
RESET R 2
WRITE CONTROL WR 3
SERIAL DATA INPUT SIN 4
WRITE CLOCK SCLK 5
OUTPUT CONTROL OC 6
GND 7
14 VCC
13 PWM1
12 PWM2
OUTPUT
11 PWM3
10 PWM4
9 XOUT CLOCK OUTPUT
8 XIN CLOCK INPUT
Outline 14P4
14P2N-A
APPLICATION
• Analog signal control in televisions and audio systems
• Control of lamps, heaters and motors
• For software servo in home appliances and industrial ma-
chinery
SIN 4
SCLK 5
CS 1
WR 3
R2
OC 6
Input
register
Control
circuit
Upper byte
register
Lower byte
register
PWM
register
To other channels
8-BIT
PWM circuit
4-bit-rate
multiplier
14 VCC
12-bit
PWM circuit
13 PWM1
12 PWM2
11 PWM3
10 PWM4
1/2
divider
Oscillation
circuit
8 XIN
9 XOUT
7 GND
1