saa7157 NXP Semiconductors, saa7157 Datasheet - Page 2

• Manufacturer Part Number: saa7157
• Description: Clock Signal Generator Circuit For Digital Tv Systems Scgc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The SAA7157 generates all clock signals required for a digital TV system suitable for the SAA715x family and the
SAA7199B (DENC). The circuit operates in either the phase-locked loop mode (PLL) or voltage controlled oscillator
mode (VCO).
QUICK REFERENCE DATA
ORDERING INFORMATION
Note
1. SOT146-1; 1996 December 17.
2. SOT163-1; 1996 December 17.
May 1992
V
V
I
I
V
f
V
V
T
DDA
DDD
i
amb
Clock generation suitable for digital TV systems (line-locked)
PLL frequency multiplier to generate 4 times of input frequency
Dividers to generate clocks LL1.5A, LL1.5B, LL3A and LL3B (4th and 2nd multiples of input frequency)
PLL mode or VCO mode selectable
Reset control and power fail detection
Suitable for applications with feature box and picture memory
DDA
DDD
LFCO
I
O
Clock signal generator circuit for digital TV
systems (SCGC)
SYMBOL
TYPE NUMBER
EXTENDED
SAA7157T
SAA7157
analog supply voltage (pin 5)
digital supply voltage (pins 8, 17)
analog supply current
digital supply current
LFCO input voltage
(peak-to-peak value)
input frequency range
input voltage LOW
input voltage HIGH
output voltage LOW
output voltage HIGH
operating ambient temperature range
PINS
20
20
mini-pack (SO20)
PIN POSITION
PARAMETER
DIL
2
PACKAGE
MATERIAL
plastic
plastic
4.5
4.5
3
10
1
6.0
0
2.0
0
2.6
0
MIN. TYP. MAX. UNIT
Product specification
5.0
5.0
-
-
-
-
-
-
-
-
-
SAA7157
SOT163A
SOT146
5.5
5.5
9
60
V
7.25
0.8
V
0.6
V
70
CODE
DDA
DDD
DDD
(1)
(2)
V
V
mA
mA
V
MHz
V
V
V
V
C