Interface IC
T6B70AF
Preliminary
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
T6B70AF
Interface IC for Water Heater
...
Description
T6B70AF
Preliminary
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.
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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 Weight: 0.16 g (typ.)
Block Diagram
OSCIN 1 OSCOUT 2 FOUT 3
SCTL
Divide-by16 unit
Pseudo sine wave generator
0°C 180°C
4-bit DA converter 4-bit DA converter
13 SOUT+ 12 SOUT− 16 VDD
Waveform initialization block
4
Modulation control circuit Zero-cross waveform shaping circuit Amplifier input circuit
SW1IN 14 SW1OUT 15
7 AMPIN 6 AMPOUT
Cycle measurement counter SW2IN 11 SW2OUT 10
RESET
Analog signal detection/non-detection Reset circuit Output buffer
8 VSS 9
DOUT
5
1
2002-02-28
T6B70AF
Pin Assignment
OSCIN OSCOUT FOUT
SCTL RESET
1 2 3 4 T6B70AF 5 6 7 8
16 15 14 13 12 11 10 9
VDD SW1OUT SW1IN SOUT+ SOUT− SW2IN SW2OUT
DOUT
AMPOUT
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AMPIN VSS
Pin Function
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol OSCIN OSCOUT FOUT
SCTL RESET
Input/Output Input Output Output Input Input Output Input ― Output Output Input Output Output Input Output ―...
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