cx25840 Conexant Systems, Inc., cx25840 Datasheet - Page 278

• Manufacturer Part Number: cx25840
• Description: Video Decoder And Broadcast Audio
• Manufacturer: Conexant Systems, Inc.

Electrical/Mechanical
Table 6-3. Signal Characteristics
6.2
Table 6-4. Clock Timing Parameters
6-2
Digital Inputs
Crystal Inputs (XTI, XTO)
Digital Outputs
Analog Input Capacitance
XTI / XTO
ITU-R BT.656 Operation
NTSC Square Pixel Operation
PAL/SECAM Square Pixel Operation
PIXCLK Duty Cycle
PIXCLK to Data Delay (see note 1)
VIPCLK Input Frequency
PLL_CLK/PRGM7 Frequency
PLL_CLK/PRGM7 Duty Cycle
GENERAL NOTE:
Input High Voltage
Input Low Voltage
Input High Current (Vin = 2.4 V)
Input Low Current (Vin = 0.4 V)
Input Capacitance (1 MHz, 2.4 V)
Input Low Voltage
Input High Voltage
Output Voltage High (IOH = –400 µA)
Output Voltage Low (IOL = 4 mA)
Three-State Current
Crystal Cycle Time
High Time
Low Time
PIXCLK Frequency
PIXCLK Frequency
PIXCLK Frequency
Data delay value is measured relative to the rising edge of PIXCLK but note that PIXCLK can be inverted for
systems requiring data to output relative to the falling edge of PIXCLK.
Parameter
Parameter
AC Electrical Parameters
Symbol
Symbol
Conexant
VOH
VOL
VIH
VIH
VIL
VIL
IOZ
IIH
IIL
Ca
Ci
1
2
3
4
4
4
5
6
7
34.919
8.192
–0.5
–0.5
Min
Min
2.0
2.4
2.4
0.0
—
—
—
45
—
25
45
—
34.921
17.460
17.460
24.54
29.50
27.0
Typ
Typ
—
—
—
—
—
—
—
—
—
—
7
5
VDDO + 0.5
VDDO + 0.5
34.922
CX25840/1/2/3 Data Sheet
VDDO
Max
Max
0.8
0.4
0.4
—
—
—
55
33
54
45
–1
10
5
1
Units
Units
MHz
MHz
MHz
MHz
MHz
102284B
µA
µA
µA
ns
ns
ns
%
ns
%
pF
pF
V
V
V
V
V
V
8/3/05