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參數(shù)資料
| 型號： | SAA7157T-T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 29 MHz, VIDEO CLOCK GENERATOR, PDSO20 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 68K |
| 代理商： | SAA7157T-T |
May 1992
2
Philips Semiconductors
Product specication
Clock signal generator circuit for digital TV
systems (SCGC)
SAA7157
FEATURES
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
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.
SYMBOL
PARAMETER
MIN. TYP.
MAX.
UNIT
VDDA
analog supply voltage (pin 5)
4.5
5.0
5.5
V
VDDD
digital supply voltage (pins 8, 17)
4.5
5.0
5.5
V
IDDA
analog supply current
3
-
9
mA
IDDD
digital supply current
10
-
60
mA
VLFCO
LFCO input voltage
(peak-to-peak value)
1
-
VDDA
V
fi
input frequency range
6.0
-
7.25
MHz
VI
input voltage LOW
input voltage HIGH
0
2.0
-
0.8
VDDD
V
VO
output voltage LOW
output voltage HIGH
0
2.6
-
0.6
VDDD
V
Tamb
operating ambient temperature range
0
-
70
°C
EXTENDED
TYPE NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
SAA7157
20
DIL
plastic
SOT146(1)
SAA7157T
20
mini-pack (SO20)
plastic
SOT163A(2)
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