HA12167FB Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HA12167FB

Audio Signal Processor for Cassette Deck (Deck 1 Chip)

Hitachi -> Renesas Electronics 

HA12167FB/HA12169FB

Operating Mode Control

HA12167FB/HA12169FB provides fully electronic switching circuits. All switches are controlled by serial

data.

Table 2 Threshold Voltage (VTH)

Pin No.

Lo

Hi

Unit

42

–0.2 to 1.5

3.5 to 5.3

V

39, 40, 41

–0.2 to 1.0

4.0 to 5.3

V

Notes: 1. Voltages shown above are determined by internal circuits of LSI when take pin 47 (DGND pin) as

reference pin. On split supply use, same VTH can be offered by connecting DGND pin to GND

pin.

This means that it can be controlled directly by micro processor.

2. Each pins are on pulled down with 100 kΩ internal resistor.

Therefore, it will be low-level when each pins are open.

3. Note on serial data inputting

(a) The clock frequency on CLK must be less than 500 kHz.

(b) Over shoot level and under shoot level of input signal must be the value shown below.

When connecting microcomputer or Logic-IC with HA12167FB/HA12169FB directly, there is

apprehension of rash-current under some transition timming of raising voltage or falling voltage at VCC

ON/OFF.

For this countermeasure, connect 10 kΩ to 20 kΩ resistor with each pins. It is shown in test circuit on this

data sheet.

In case of changing NR-ON/OFF at the C-mode, for the countermeasure of the noise of pop, perform the

following processes.

In case of changing NR-OFF to NR-ON at C-mode. C-mode, NR-OFF → B-mode, NR-OFF → B-mode,

NR-ON → C-mode, NR-ON.

In case of changing NR-ON to NR-OFF at C-mode. C-mode, NR-ON → B-mode, NR-ON → B-mode,

NR-OFF → C-mode, NR-OFF.

Under 5.3 V

0

Within –0.2 V

Figure 2 Input Level

Rev.3, Jun. 1997, page 19 of 73

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