T6B70AF

2002-02-28

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

T6B70AF

Interface IC for Water Heater

The T6B70A incorporates two-channel 4-bit DA converter, a

pseudo sine wave generator and an external analog signal

detection/non-detection circuit. It is designed to be used mainly

for communication between water heater and control unit.

Features

· On-chip two-channel 4-bit DA converter (opposite polarities)

· On-chip pseudo sine wave generator (external clock/16)

· On-chip external analog signal detection/non-detection circuit

· On-chip two-channel analog switch

Block Diagram

Weight: 0.16 g (typ.)

Preliminary

Divide-by-

16 unit

Pseudo

sine wave

generator

Waveform

initialization block

Modulation

control circuit

Reset

circuit

Zero-cross

waveform

shaping circuit

Cycle measurement counter

Analog signal

detection/non-detection

Amplifier input

circuit

4-bit

DA converter

4-bit

DA converter

1

2

3

4

14

15

11

10

5

13

12

16

7

6

8

9

OSCIN

OSCOUT

FOUT

SCTL

SW1IN

SW1OUT

SW2IN

SW2OUT

RESET

SOUT+

SOUT−

AMPIN

AMPOUT

DOUT

0°C

180°C

Output buffer