STV0042A/Z STMicroelectronics, STV0042A/Z Datasheet - Page 8

• Manufacturer Part Number: STV0042A/Z
• Description: Video ICs Analog Sound/Video
• Manufacturer: STMicroelectronics
• Type: Audio DSPr

Specifications of STV0042A/Z

• Maximum Operating Temperature: + 70 C
• Package / Case: PDIP-42
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

General Information
1.1.2.4 De-emphasis Time Constants
1.1.2.5 Volume-controlled Audio Outputs
1.1.2.6 Fixed-level Audio Outputs
8/37
the minimum/maximum roll-off frequencies. A resistor in series with a capacitor is connected to the
ground via pins FCL and FCR (pins 41 and 1, respectively).
Pins U75L and U75R (pins 29 and 37, respectively) are external de-emphasis networks for left and
right channels. For each channel, a capacitor and resistor in parallel with a 75 µs time constant are
connected to the V
be added in parallel thereby converting the network to approximately 50 µs de-emphasis. The value
of the internal resistors is 30 k
with ±500 mV input the output will be ±55 µA.
Pins VOLL and VOLR (pins 7 and 4, respectively) are the main audio outputs from the volume
control amplifier. Output signals may be as high as 2 V
volume control is between +12 dB and -26.75 dB in steps of 1.25 dB with possible Mute. This
amplifier has short-circuit protection and is intended to drive a SCART connector directly via AC
coupling and meets the standard SCART drive requirements. These outputs feature high
impedance mode for parallel connections.
Pins S2OUTL and S2OUTR (pins 9 and 11, respectively) are audio outputs that are directly sourced
from the audio multiplexer, and as a result do not include any volume control functions. They will
output a 1 V
impedance mode for parallel connections and meet SCART drive requirements.
RMS
signal biased at 4.8 V. They are short-circuit protected. These outputs feature high
REF
to provide a 75 µs de-emphasis. An internal resistor can be programmed to
AUDIO PLL
AUX IN
K
b
b
b
b
a
a
1
2
1
2
2
Figure 4: Audio Switching
±30%. The amplifier for this filter is voltage input, current output;
K
On
On
On
Off
Off
Off
3
DEEMPHASIS
+ ANRS
AUDIO
No ANRS, No de-emphasis
No ANRS, 50 µS
No ANRS, 75 µS
ANRS, No de-emphasis
ANRS, 50 µS
ANRS, 75 µS
VOL OUT
K
K
RMS
1a
1c
AUX OUT
(+12 dB) with a DC bias of 4.8 V. The
K
K
K
5b
5c
5a
STV0042A/Z