STV6688A STMicroelectronics, STV6688A Datasheet

STV6688A

Manufacturer Part Number
STV6688A
Description
Manufacturer
STMicroelectronics
Datasheet

Specifications of STV6688A

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Key Features
General Description
The STV6688 is a highly-integrated I²C bus-
controlled video switch matrix, optimized for use in
color TV applications.
It is used to control the switching of 4 video signals.
These signals can be in Single Component form
(CVBS) or in Two Component form (Y/C). In both
cases, the STV6688 microcontroller provides a
CVBS signal for an external device (monitor).
September 2003
This is preliminary information on a new product now in development. Details are subject to change without notice.
I²C Bus Control
Standby Mode
4 Y/CVBS Inputs (one for internal TV signal)
4 C Inputs (one for internal TV signal)
1 Y/C Adder
1 Y/CVBS and 1 C Output, each with 0 dB gain
1 CVBS Output with 6 dB gain and 150
Buffer for Monitor
SYNC Bottom Clamp on all CVBS/Y and
Average Bias on C Inputs
Bandwidth: 15 MHz
Crosstalk: 50 dB (min.)
®
Video Switch Matrix for TV Applications with S Terminal
Pin Connections
Y/CVBS_IN1
Y/CVBS_IN2
Y/CVBS_IN3
GND_V
VCC_V
C_IN1
C_IN2
C_IN3
VDD
SDA
Order Code: STV6688A
Order Code: STV6688
1
2
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5
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9
10
PDIP20
PSO20
20
19
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11
STV6688
PRODUCT PREVIEW
DEC
Y/CVBS_IN_TV
C_IN_TV
VCC_B
CVBS_OUT
GND_B
Y/CVBS_OUT
C_OUT
GND
SCL
1/12

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STV6688A Summary of contents

Page 1

... Two Component form (Y/C). In both cases, the STV6688 microcontroller provides a CVBS signal for an external device (monitor). September 2003 This is preliminary information on a new product now in development. Details are subject to change without notice. PDIP20 Order Code: STV6688 PSO20 Order Code: STV6688A Pin Connections Y/CVBS_IN1 1 C_IN1 2 VCC_V 3 ...

Page 2

Functional Description 1 Functional Description Pin Symbol 1 Y/CVBS_IN1 Y or CVBS Signal of Ext. Input 1 2 C_IN1 C Signal of Ext. Input 1 3 VCC_V Video Switch Power Supply 4 Y/CVBS_IN2 Y or CVBS Signal of Ext. Input ...

Page 3

... V -400 mV DCIN DCIN Y/CVBS Electrical Characteristics = 4 150 , unless otherwise LoadCVBS Min. Typ. 4.5 5 4 0.3 Package Value DIP20 (STV6688) 80 SO20 (STV6688A) 100 = 4 150 , unless otherwise LoadCVBS Min. Typ Max. Unit 5.5 V 5 Unit °C/W °C/W Max. Unit 1 1 MHz ...

Page 4

Electrical Characteristics Parameter Symbol Flatness Spread of Gain in Video Band (15 kHz-5 MHz) Y/C Mixer (on CVBS_OUT) CTi Crosstalk Isolation between Y/CVBS Input Channels CTo Crosstalk Isolation of Y/CVBS from C Channels GYCVBS Gain at Y/CVBS out @1 MHz ...

Page 5

STV6688 Parameter Symbol G Gain matching between C inputs CM CToYdel Chroma to Luma delay, Y/C source Test Conditions @4.43 MHz PP Electrical Characteristics Min. Typ. Max. Unit -0 ...

Page 6

Electrical Characteristics 2.4 I²C Bus Characteristics T = 25° AMB CCV specified. Parameter Symbol Address Selection Input ADDsel_L Address Selection Low Level ADDsel_H Address Selection High Level ILEAK Leakage Current SCL V Low Level Input Voltage IL ...

Page 7

STV6688 SDA t BUF SCL SDA (Start, Stop) 2.5 I²C Bus Selection Data transfers follow the usual I²C format: after the Start condition (S), a 7-bit slave address is sent, followed by an 8-bit word which is a data direction ...

Page 8

Input/Output Groups 3 Input/Output Groups 8/12 Figure 3: Bottom Clamped Video Inputs (Pins and 19 tri Protected Pad Figure 4: Average Clamped Video Inputs (Pins 2, 5, ...

Page 9

STV6688 Figure 6: I²C Bus SDA (Pin 10 Float DD Acknowledge 10 k Protected Pad Figure 7: I²C Bus SCL (Pin 11 Float Protected Pad Input/Output Groups 9/12 ...

Page 10

Package Mechanical Data 4 Package Mechanical Data Figure 8: 20-Pin Plastic Single in Line Package (PDIP20) Dim. Min 0.38 A2 2.92 b 0.36 b2 1.14 c 0.20 D 24. 6.10 L 2.92 10/12 mm Typ. Max. ...

Page 11

STV6688 Figure 9: 20-Pin Plastic Small Outline Package, 300-mil Width (PSO20) Dim. Min. A 2.35 A1 0. 4. 10.01 h 0.25 K 0° Typ. Max. 2.65 0.51 ...

Page 12

... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied ...

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