TC9488F TOSHIBA [Toshiba Semiconductor], TC9488F Datasheet
TC9488F
Related parts for TC9488F
TC9488F Summary of contents
Page 1
... They are controlled either by DC voltage or controlled in serial by the MCU. 2 TC9455F/N: Supports I C bus interface TC9488F/N: Supports three-lead interface The system clock is generated by the CR oscillator circuit. · · The echo feedback amount is configured using analog circuits. The feedback level can be freely set The IC comes in 30-pin flat package or 24-pin shrink DIP. · ...
Page 2
Block Diagram System Block Diagram 2 TC9455,88F/N 2002-02-05 ...
Page 3
... TEST 23 29 POOUT Note 1: With the TC9455F and TC9488F, pins 4, 8, 12, 19, 24, and 27 are not connected (NC pins). NC pins are normally open. I/O Function ― Digital supply voltage pin I Capacitor connecting pin for CR oscillator ( pF) I Resistor connecting pin for CR oscillator (R = 5.6 kΩ) When VOLST = “ ...
Page 4
... Operation 1. Oscillator circuit The TC9455F/N and TC9488F/N generate an internal system clock using the CR oscillator circuit. Connecting a capacitance ( and a resistance (R) of 5.6 kΩ sets the oscillator frequency to approx. 4 MHz and the sampling frequency to 32 kHz. Varying the external capacitance enables the oscillator frequency and sampling frequency for the system clock to be adjusted ...
Page 5
AD/DA converter and digital delay circuit 3. The AD/DA converter is a 12-bit successive comparison type. The sampling frequency when the system clock operates at 4 MHz is 32 kHz. The analog signal input from the AD converter is converted ...
Page 6
... Table 1 lists bits used to set the volume. MODE DA7 VOL1 setting M3 VOL2 setting M3 VOL3 setting M3 VOL1 setting M3 M3, M2, M1, M0: Volume setting data 2 C bus interface; the TC9488F/N, a three-lead interface. Figure 4 Serial control timing Table 1 Volume setting bits DA6 DA5 DA4 DA3 ...
Page 7
Setting of microphone and echo volumes Table 2 lists the microphone setting values and attenuation; Table 3 lists the echo volume setting values and attenuation. The DC level settings are typical values. Table 2 Microphone volume (VOL1, VOL2) attenuation ...
Page 8
Maximum Ratings (Ta = 25°C) Characteristics Supply voltage Input voltage Power dissipation Operating temperature Storage temperature Electrical Characteristics DC characteristics Characteristics Operating supply voltage Operating supply current Operating frequency Power-on reset voltage “H” level Input voltage “L” level “H” level ...
Page 9
... Interface setup time Shift clock “L” duration Shift clock “H” duration Data setup time Data hold time Interface hold time CS “H” duration Note 4: With TC9488F and TC9488N Test Symbol Test Condition Circuit Input 1-kHz sine wave, MICG ― ...
Page 10
... AC Characteristics Test Points 1. TC9488F/N three-lead interface 2 2. TC9455F bus interface 2 Purchase of TOSHIBA I C components conveys a license under the Phillips I 2 components system, provided that the system conforms to the I defined by Phillips. tIFS > 0.25 µs interface setup time tL > 0.25 µs shift clock L time tH > ...
Page 11
TC9455/88F AC Test Circuit 11 TC9455,88F/N 2002-02-05 ...
Page 12
Package Dimensions Weight: 1.08 g (typ.) 12 TC9455,88F/N 2002-02-05 ...
Page 13
Package Dimensions Weight: 1.2 g (typ.) 13 TC9455,88F/N 2002-02-05 ...
Page 14
RESTRICTIONS ON PRODUCT USE · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress ...