CXA2078Q Sony, CXA2078Q Datasheet

no-image

CXA2078Q

Manufacturer Part Number
CXA2078Q
Description
I^2C Bus-Compatible Audio/Video Switch with Electronic Volume
Manufacturer
Sony
Datasheet

Specifications of CXA2078Q

Case
QFP
For the availability of this product, please contact the sales office.
Description
video switch designed for set top box applications. It
interfaces from digital encoder sources to TV, VCR
and auxilliary scart connectors.
Features
• 3 scart independent audio/video switching (TV, VCR,
• 0 to –63dB volume control with click noise reduction
• 5 stereo audio inputs
• I
• Scart Function Switching input and output
• Scart Fast Blanking for OSD
• RF modulator output with Y/C mix option
• On-chip +12V to +9V voltage regulator
• 4 logic outputs
Applications
for set top box
Structure
Absolute Maximum Ratings
• Supply voltage
• Operating temperature Topr
• Storage temperature
• Allowable power dissipation
Operating Conditions
• Supply voltage
• Operating voltage
The CXA2078Q is an I
AUX)
Audio/Video switch featuring I
Bipolar silicon monolithic IC
2
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
C control with two address setting
I
2
C Bus-Compatible Audio/Video Switch with Electronic Volume
V
Tstg
P
2
CC
D
C programmable audio,
2
C bus compatibility
+10.7 to +12
–65 to +150
–20 to +75
9 ± 0.5
500
12
mW
°C
°C
V
V
V
– 1 –
CXA2078Q
64 pin QFP (Plastic)
E97843-PS

Related parts for CXA2078Q

CXA2078Q Summary of contents

Page 1

... C Bus-Compatible Audio/Video Switch with Electronic Volume 2 For the availability of this product, please contact the sales office. Description 2 The CXA2078Q programmable audio, video switch designed for set top box applications. It interfaces from digital encoder sources to TV, VCR and auxilliary scart connectors. Features • ...

Page 2

... Pin Configuration VOUT2 52 FBLK_OUT 53 VOUT1 54 V _12V 55 CC VREG_9V 56 VREG_BASE 57 VIDEO_V 58 CC RIN5 59 FBLK_IN2 60 LIN5 61 VIN1 62 RIN1 63 VIN3 – 2 – CXA2078Q 33 32 ROUT1 31 VOUT5 30 LOUT1 29 VOUT6 28 ROUT2 27 VOUT7 26 LOUT2 25 AUDIO_V CC 24 VIN12 23 BIAS_AUDIO 22 VIN8 21 LIN3 20 VIN4 ...

Page 3

... Y/C MIXER 35 TRAP VOLUME CONTROL & MUTE 2 51 RTV 8dB 1dB step step 2 49 LTV 8dB 1dB step step 34 MONO Z.C.D Logic 2 32 ROUT1 2 30 LOUT1 2 ROUT2 LOUT2 38 FNC_TVA 37 FNC_TVB 46 LOG_1 45 LOG_2 44 LOG_3 43 LOG_4 CXA2078Q TV VCR AUX RF MOD TV RF MOD VCR AUX TV ...

Page 4

... V = 12V CC 22k 51 32 20k – 4 – Description Video signal inputs. Input impedance typically 120kΩ. 60µA 4.5V Audio signal inputs. Input impedance typically 60kΩ. 7µ Video signal outputs. 280µ 33µA Audio signal outputs. 20k 33µA CXA2078Q ...

Page 5

... V = 12V V CC 40k 2. 20k – 5 – Description = 9V CC Audio mono signal output. Reference Bias for video circuit. Connected to GND with capacitor Reference Bias for audio circuit. Connected to GND with capacitor controlled output giving 0/2V. Maximum load current = 800µA CXA2078Q ...

Page 6

... CC 40µ 40k 10k V 40µ 40k 4.5k – 6 – Description Pin connected to emitter of external regulator transistor. 120µA Connection to base of external regulator transistor. 120µ Clock Input 1.5V (max 3.0V (min Data input/output 1.5V (max 3.0V (min 0.4V (max) OL CXA2078Q ...

Page 7

... Open collector logic Pins. Maximum current sink = 1mA Connection to external trap circuit. Trap components should be kept as close as possible to this pin Fast Blank output set FBLK_IN1 or FBLK_IN2. High = 5.1V Low = 1.2V Connected to external emitter follower. Maximum load current = 800µA CXA2078Q 2 C ...

Page 8

... FBLK_IN1 41 — FBLK_IN2 60 FNC_VCR 5 — FNC_AUX 7 Equivalent circuit V = 12V CC 50µA 147 41 60 90µ 80µA 50k 50k 5 7 10k 100k – 8 – Description Fast Blank inputs. Low = < 0.4V High = > 1.0, < 3.0 Function switching input (Scart pin 8). Typical levels = 0V/6V/12V CXA2078Q ...

Page 9

... Video_Vcc, Dig_Vcc, Audio_Vcc FNC_TVA (pin 38) and FNC_TVB (pin 39) are static sensitive. Precaution should be taken (note 8 in "Notes on Operation"). Operation of the CXA2078Q using a 9V supply connected directly to the V and Dig_V pins is possible but not recommended. (The unused on-chip voltage regulator is then forced to CC have pins Vreg_base and Vreg_9V floating ...

Page 10

... V (Fig.4) –3 –0.4 V2 –1 100 1.5 1 0.2 15 CXA2078Q Max. Unit 70 mA Max. Unit 4.9 V 4.2 V 4.2 V 6.5 dB 6.4 dB MHz — MHz — Vp-p — Vp-p –50 dB — dB kΩ +3 ...

Page 11

... HPF @ 20Hz, LPF @ 20kHz. (Fig 1kHz, 0.5Vrms input. Set by I (Fig. 1kHz, 0.5Vrms input. Set by I (Fig. 1kHz, 1Vrms input. (Fig.6) Offset voltage between any audio input and RTV, LTV outputs (Fig.5) – 11 – CXA2078Q Min. Typ. Max. 4.2 4.5 4.8 –0.5 0 +0.5 – ...

Page 12

... Voltage measurements carried out with a high input impedance DVM. Typically 10GΩ. +12V +12V + SCL SDA 47µF Fig. 1. Video system (d.c.test) – 12 – +12V 47µH 25pF Measurement 1k Point Trap 1k Switch SW1 BC547B BC547B BC547B 25 +9V 24 22µ CXA2078Q +12V +12V +12V ...

Page 13

... All video outputs are loaded with emitter follower during tests. 5. For Luma and Chroma input to output delay, measure signal at the I.C. pins. +12V + SCL SDA – 13 – +12V 47µH 25pF Measurement 1k Point Trap 1k Switch SW1 BC547B BC547B BC547B 25 + 2.2µ 2.2µ 2.2µF 75 CXA2078Q +12V +12V +12V 22µF ...

Page 14

... Signal applied and measured from pins 14, 16, 18, 20, 22, 24, 62, 64 Notes) 1. All +9V supplies de-coupled close to supply pins, 25, 47, 58 with 10nF ceramic capacitor. 2. Voltage measurements carried out with a high input impedance DVM. Typically 10GΩ. + SCL SDA Measurement Point Fig. 3. Video system (input impedance) – 14 – CXA2078Q + 22µ ...

Page 15

... All video outputs are loaded with emitter follower during tests. +12V +12V + SCL SDA 47µF Fig. 4. Video system (linearity, sync crush) – 15 – +12V 47µH 25pF Measurement 1k Point Trap 1k Switch SW1 BC547B BC547B BC547B 25 +9V 24 22µ CXA2078Q +12V +12V +12V ...

Page 16

... Notes) 1. All +9V supplies de-coupled close to supply pins, 25, 47, 58 with 10nF ceramic capacitor. 2. Voltage measurements carried out with a high input impedance DVM. Typically 10GΩ. +9V HW mute +9V SW1 47µF SCL SDA Fig. 5. Audio system (d.c. tests) – 16 – CXA2078Q Output Measurement Point +9V 24 22µ ...

Page 17

... When muting audio using Hardware mute, SW1 is closed. +9V HW SW1 mute + 47µF SCL SDA – 17 – Measurement 33 10µF 10k 32 31 10µF 10k 30 29 10µF 10k 28 27 10µF 10k 22µ 1µ 1µF 1µF 1µF 600 600 600 CXA2078Q Point 600 ...

Page 18

... Note) All +9V supplies de-coupled close to supply pins, 25, 47, 58 with 10nF ceramic capacitor. +9V HW SW1 mute + 47µF SCL SDA Fig. 7. Audio system (Bandwidth) – 18 – Measurement 33 10µF 10k 32 31 10µF 10k 30 29 10µF 10k 28 27 10µF 10k 22µ 1µF 20 1µF 1µF 1µF 600 600 600 CXA2078Q Point 600 ...

Page 19

... Note) All +9V supplies de-coupled close to supply pins, 25, 47, 58 with 10nF ceramic capacitor. +9V HW SW1 mute + 47µF 1µF SCL SDA 600 Fig. 8. Audio system (Ripple Rejection) – 19 – Measurement Point 33 10µF 10k 32 31 10µF 10k 30 29 10µF 10k 28 27 10µF 10k 26 25 100Hz 0.3Vp 22µ 1µ 1µF 1µF 600 600 CXA2078Q +9V 600 ...

Page 20

... CC – 20 – CXA2078Q ...

Page 21

... C data bus. The circuit is shown in Fig. 1-2 with a Video_V = 9V CC Switch AMP 120k Vbias 6dB 6dB 1k 1k 6.5k 0dB 147 6.5k 0dB Fig. 1-2. Y/C MIXER Circuit – 21 – 12V CC beta = 250 BC547B SCART_out Vout Load Vout3 Vout4 Vout8 6dB TRAP 1k 47µF 25pF CXA2078Q ...

Page 22

... C will only be implemented when a minimal (ie zero 2 C read mode (Z.C status). When this bit is high, 90µs (360µs) un-mute the output buffer. Such a period provides – 22 – CXA2078Q 2 C write mode volume change or mute ...

Page 23

... Fig. 2-4. T.V. audio section and Electronic Volume Control Audio out (external) 33k 4.5V Fig. 2-2. Audio output configuration +6dB Mute 4. Registers 0 to –56dB 0 to –7dB EVC EVF Zero to control Cross logic Detect – 23 – CXA2078Q 10µF SCART 600 Terminal 400pF 10k Audio output +6dB TV Audio Output Mute (–80dB) ...

Page 24

... When Y/C Mix = 1 converts Y/C input to CVBS for output through Vout8 LOG1-LOG4: Logic outputs (open collector high impedance current sink mode. A DATA2 A DATA3 P: Stop condition EVF Vid_Sw1 (TV) Vid_Sw2 (VCR) Vid_Sw3 (AUX LOG4 – 24 – CXA2078Q A DATA4 A DATA5 (W) 0 Z.C.D TVMute Aud_Sw1 (TV) Aud_Sw2 (VCR) Aud_Sw3 (AUX) LOG3 LOG2 LOG1 ...

Page 25

... At pin 7 AV switch monitors the voltage of pin 8 from AUX scart, and records status. ZC Status: ZC Status = 1 indicates that zero cross condition has been achieved after a volume or mute instruction issued. P.O.D.: Power On Detect. P.O. when DIG_V approximately 5V P.O.D. FUNC_AUX STATUS voltage rises above a threshold level of CC – 25 – CXA2078Q ( FUNC_VCR ...

Page 26

... Vin10 Digital encoder Vin11 VCR Vin12 Aux Vin3 Digital encoder Vbias Video Mute Vbias Video Mute Vbias Video Mute – 26 – CXA2078Q Vout4 Comment CVBS/Y Vin9 Digital encoder Vin10 Digital encoder Vin11 VCR Vin12 Aux Vin3 Digital encoder Vin10 Digital encoder ...

Page 27

... Vin9 Vbias Vin11 Vin12 Vin3 Vbias Vbias Vbias Table 3-3. showing which video input pins connect to the single AUX output pin Comment Digital encoder Video Mute VCR Aux Digital encoder Video Mute Video Mute Video Mute – 27 – CXA2078Q ...

Page 28

... I C Control In the CXA2078Q, there are two fast blanking inputs, one associated with the auxiliary RGB/CVBS inputs and another associated with Digital Encoder input. These can be selected by I inputs, the fast blank pin output can be set to a constant means of the I four possible states. These are controlled according to the following table. ...

Page 29

... TV Function switch, Interface table FNC_TVA d3_b7 d3_b6 Pin voltage Default is Internal TV ( power Z.C P.O.D. STATUS read data6 b3/b1 b2/b0 (Internal TV) 0 (16:9 External) 0 (4:3 External) 1 FNC_TVB Comment Pin voltage 2V Internal TV (default) 2V External 16:9 0V External 4:3 0V External 4:3 – 29 – FUNC_AUX FUNC_VCR CXA2078Q b0 (R) 1 ...

Page 30

... Some external circuitry is required to interface from the IC pins to the SCART pin 8. A typical interface circuit is shown in Fig. 5-2. CXA2078Q FNC_TVA (38) Circuit FNC_TVB (37) Mux d3_b6 Fig. 5-1. TV Function switch output 12V FNC_TVA 1k FNC_TVB 2.2k 2.2k Fig. 5-2. External circuit for function switch – 30 – 2V < 0.4V 2V < 0. scart pin 8 50 CXA2078Q ...

Page 31

... C bit 1 = current sink mode resulting in 0.2V saturation voltage on logic pin Vmax at logic pin = 12V Imax during current sink = 1mA d5_b3 d5_b2 d5_b1 d5_b0 10k 10k LOG_1 LOG_2 Logic Logic cct. cct. Fig. 6-1. Open collector logic outputs – 31 – External 10k 10k resistors LOG_3 LOG_4 CXA2078Q ...

Page 32

... Rin3 Rin4 Rin5 Audio mute Audio mute Audio mute Gain (dB) 0 –8 –16 –24 –32 –40 –48 –56 Gain (dB) 0 –1 –2 –3 –4 –5 –6 –7 – 32 – Lin1 Lin2 Lin3 Lin4 Lin5 Audio mute Audio mute Audio mute CXA2078Q ...

Page 33

... As shown on the application schematic, static protection for pins 38 and 37 may typically be achieved using Zener diodes. Diodes with a Zener voltage > 5V are suitable. Z.C.D RTV, LTV, MONO output DATA1 b0 0 Un-mute immediately 1 Un-mute on next zero cross 0 Mute immediately 1 Mute on the next zero cross – 33 – CXA2078Q ...

Page 34

... NOTE: Audio input 6k resistor removed for this test. Video frequency characteristics 100k Input = 1kHz, 400Hz – 80kHz BPF 3.66 Input [Vrms] Input = 0.3Vp-p 10k 100k Frequency [Hz] V 1-8 (MIX = OFF) OUT V 8 (MIX = ON) OUT Input = 0.3Vp-p 1M 10M Frequency [Hz] – 34 – CXA2078Q 1M 50M ...

Page 35

... PACKAGE STRUCTURE PACKAGE MATERIAL QFP–64P–L01 LEAD TREATMENT LEAD MATERIAL QFP064–P–1420 PACKAGE MASS – 35 – + 0.1 0.15 – 0.05 0.15 + 0.2 0.1 – 0.05 + 0.35 M EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 1.5g CXA2078Q ...

Related keywords