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PDF AK8158A Data sheet ( Hoja de datos )
| Número de pieza | AK8158A | |
| Descripción | Multi Clock Generator | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK8158A]
AK8158A
Multiclock Generator with VCXO
1. General Description
The AK8158A is a member of AKM’s low power multi clock generator family designed for a feature rich
DTV or STB, requiring a range of system clocks with high performance. The AK8158A generates different
frequency clocks from a 27MHz crystal oscillator and provides them to up to four outputs configured by
pin-setting. The on-chip VCXO accepts a voltage control input to allow the output clocks to vary by ±110 ppm
for synchronizing to the external clock system. Both circuitries of VCXO and PLL in AK8158A are derived
from AKM’s long-term-experienced clock device technology, and enable clock output to perform low jitter
and to operate with very low current consumption. The AK8158A is available in a 20-pin QFN package.
2. Features
27MHz Crystal Input
Four Frequency-Selectable Clock Outputs
One 27MHz-Reference Output
Selectable Clock out Frequencies:
- 74.1758, 74.250MHz
- 25.000MHz
- 4.9152, 12.000, 24.000,24.576MHz
- 33.333MHz
Built-in VCXO
- Pull Range: ±110ppm (Min.)
Low Jitter Performance
- Period Jitter:
30psec typ. (1σ) at CLK1-4
- Long Term Jitter:
150psec typ. (1σ) 74.1758MHz
30psec typ. (1σ) at REFOUT
Low Current Consumption:
16.5mA typ. at 3.3V
Supply Voltage:
2.85 – 3.6V
Operating Temperature Range:
-20 to +85C
Package:
20-pin QFN (Lead free)
Application:
- Digital TV Sets
- Personal Video Recorders
- Set Top Boxes
- Multi Media Receivers
- Closed-Circuit Television
MS1335-E-01
-1-
2013/12
http://www.Datasheet4U.com
1 page  
[AK8158A]
6. Absolute Maximum Ratings
Over operating free-air temperature range unless otherwise noted (1)
Items
Symbol
Ratings
Unit
Supply voltage
VDD
-0.3 to 4.6
V
Input voltage
Vin VSS-0.3 to VDD+0.3 V
Input current (any pins except supplies)
Storage temperature
IIN
Tstg
±10
-55 to 130
mA
C
Note
(1) Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress ratings only. Functional operation of the device at these or any other
conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to absolute-maximum-rating conditions for extended periods may affect device reliability.
Electrical parameters are guaranteed only over the recommended operating temperature range.
ESD Sensitive Device This device is manufactured on a CMOS process, therefore,
generically susceptible to damage by excessive static voltage.
Failure to observe proper handling and installation procedures can cause damage. AKM
recommends that this device is handled with appropriate precautions.
7. Recommended Operating Conditions
Parameter
Symbol
Conditions
Min Typ Max Unit
Operating temperature
Supply voltage (1)
Ta
VDD
-20 85 C
2.85 3.3 3.6 V
Output Load Capacitance
Cp1 Pin: CLK1-4
Cp2 Pin: REFOUT
15 pF
25 pF
Note:
(1) Power to VDD1, VDD2 and VDD3 requires to be supplied from a single source. A decoupling
capacitor of 0.1μF for power supply line should be installed close to each VDD pin.
MS1335-E-01
-5-
2013/12
5 Page 
Marking
a: #1 Pin Index
b: Part number
c: Date code (4 digits: YWWL, Year/Weak/Lot No.)
15 14 13 12 11
16
17
b
18
19
20
a
158A
xxxx
12345
10
9
8
c
7
6
[AK8158A]
MS1335-E-01
- 11 -
2013/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AK8158A.PDF ] | |
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