saa5250 NXP Semiconductors, saa5250 Datasheet - Page 27

• Manufacturer Part Number: saa5250
• Description: Interface For Data Acquisition And Control For Multi-standard Teletext Systems
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes to the characteristics
1. Unless R7 = 00 the value given is unacceptable.
2. When CBI signal is maintained at 0 V (R7 = 00) and if SD input signal is correctly referenced to ground, no coupling
3. DCK 50 is the DCK period plus 50 ns.
4. 3 DCK 110 is 3 DCK period 110 ns.
5. 3 DCK is 3 DCK period.
6. 2 DCK is 2 DCK period.
7. X = irrelevant.
January 1987
Demodulator interface
DCK LOW
DCK HIGH
Serial data set-up time
Serial data hold time
Validation signal set-up time
Validation signal hold time
Other I/O signals
User definable width as a
multiple of DCK period
Validation signal width
User definable delay as a
multiple of DCK period
Interface for data acquisition and control
(for multi-standard teletext systems)
(see SD and DCK D.C.
CHARACTERISTICS)
capacitor is required.
PARAMETER
Fig.14
conversion
rate < 7,5 MHz
conversion
rate < 7,5 MHz
Fig.15
note 7
CONDITIONS
t
t
t
t
t
t
t
t
t
DCKL
DCKH
SSD
HSD
SVALI
HVALI
WCBB
WVAL
DVAL
SYMBOL
27
55
55
0
30
50
50
0
X
0
MIN.
12
TYP.
63
X
127
Product specification
MAX.
SAA5250
ns
ns
ns
ns
ns
ns
DCK
DCK
DCK
UNIT