AK8128C

AK8128C
Audio Clock Generator
AK8128C
Features
Description
Output Frequency Range:
12.288MHz, 24.576MHｚ
The AK8128C is a single clock generator IC with
an integrated PLL. It can generate Audio clock
from a 27MHz master clock input frequency. A
high performance PLL locks to the master clock
input, generating a low jitter, highly accurate clock
output without an external crystal.
33.8388MHｚ, 36.864MHz
Input Frequency:
27MHz
Low Jitter Performance:
20 ps (Typ.) Period, 1σ
290ps(Typ.) 1000cycle long term, p-p
Low Current Consumption:
8mA (Typ.)
Output Load:
15pF (max.)
Supply Voltage:
3.0 – 3.6V
Operating Temperature Range:
-20 to +85℃
Package:
10-pin TMSOP (lead-free)
Applications
DTV
PVR
DVC
DSC
Block Diagram
VDD
CLKIN
（27.0MHz）
PLL
F0
CKOUT
(12.288/24.576
33.8388/36.864MHz)
N.C.
N.C.
F1
VSS
AK8128C Single Clock Generator
MS1111-E-00
Sep-09
-1-
AK8128C
Pin Descriptions
VDD
VSS
CLKIN
VSS
VDD
1
1
2
2
3
3
4
4
5
5
10
10
9
9
8
8
7
7
6
6
Package: 10-Pin TMSOP (Top View)
N.C(GND)
F1
F0
N.C(GND)
CKOUT
Pin
No.
Pin
Name
Pin
Type
1
VDD
--
Power Supply
2
VSS
--
Ground
3
CLKIN
IN
27MHz External Clock Input
4
VSS
--
Ground
5
VDD
--
Power Supply
6
CKOUT
OUT
Clock Output
7
N.C
--
Connect to VSS
8
F0
IN
Clock Frequency Range Select Pin 0.
(1) (2)
9
F1
IN
Clock Frequency Range Select Pin 1.
(1) (2)
10
N.C
--
Connect to VSS
Description
(1) Internal pull down 400kΩ (Typ.)
(2) See Table1 for output frequency settings.
Table 1: Operation Clock Frequency Setting
Pin Setting
F1
F0
L
L
L
H
H
L
H
H
CKOUT (MHz)
33.8688
36.864
12.288
24.576
Ordering Information
Part Number
Marking
Shipping Packaging
Package
Temperature
Range
AK8128C
128C
Tape and Reel
10-pin TMSOP
-20 to 85 ℃
Sep-09
MS1111-E-00
-2-
AK8128C
Absolute Maximum Rating
Over operating free-air temperature range unless otherwise noted
Items
(1)
Symbol
Supply Voltage
Ratings
Unit
V
VDD
-0.3 to 4.6
Input Voltage
Vin
VSS-0.3 to VDD+0.3
V
Input Current (any pins except supplies)
IIN
±10
mA
Tstg
-55 to 130
°C
Storage Temperature
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.
Recommended Operation Conditions
Parameter
Operating Temperature
Symbol
Conditions
Min
Ta
-20
Supply Voltage
VDD
3.0
Input Clock Frequency
Fin
3.3
Max
Unit
85
°C
3.6
V
27
Input Clock Duty Cycle
Output Load Capacitance
Typ
30
Cpｌ
50
MHz
70
%
15
pF
Note:
(1) Power to VDDs requires to be supplied from a single source.
supply line should be installed close to each VDD pin.
MS1111-E-00
A decoupling capacitor of 0. 01µF for power
Sep-09
-3-
AK8128C
DC Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta: -20 to +85℃, Input Frequency: 27MHz,
unless otherwise noted
Parameter
Symbol
Conditions
MIN
TYP
MAX
Unit
High Level Input Voltage
VIH
Pin: CLKIN, FSEL, OE
Low Level Input Voltage
VIL
Pin: CLKIN, FSEL, OE
Input Current 1
IL 1
Pin: CLKIN
-10
+10
μA
Input Current 2
IL 2
Pin: F0,F1
-20
+20
μA
High Level Output
Voltage
VOH
Low Level Output
Voltage
VOL
Current Consumption
IDD
Pin: CLKOUT
IOH=-4mA
0.7VDD
V
0.3VDD
0.8VDD
V
V
Pin: CLKOUT
IOL=+4mA
No load @36.864MHz
8
(VDD=3.3V, Ta=25℃)
0.2VDD
V
10
mA
AC Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta: -20 to +85℃, Input Frequency: 27MHz,
Parameter
Symbol
Conditions
F1/F0=”LL”
F1/F0=”LH”
F1/F0=”HL”
F1/F0=”HH”
Output Clock Frequency
Output Clock Duty Cycle
Output Clock Rise Time
Output Clock Fall Time
(2)
(2)
TYP
MAX
Unit
-
33.8688
36.864
12.288
24.576
-
MHz
45
50
55
%
0.2VDD to 0.8VDD
1.5
2.0
ns
tfall
0.2VDD to 0.8VDD
1.5
2.0
ns
20
100
ps
290
550
ps
1
3
ms
Jit1
Output Clock Jitter 2
Jit2
(1)
MIN
trise
Output Clock Jitter 1
Output Lock Time
unless otherwise noted
tlock
Period,
1σ in 10000 sampling
Long term 1000 cycle p-p
±3σ in 10000 sampling
Power-up
(1) The time that output reaches the target frequency within accuracy of ±0.1% from the point that the
power supply reaches VDD
(2) With the load capacitance specified by the recommended operation conditions
Sep-09
MS1111-E-00
-4-
AK8128C
Typical Connection Diagram
+3.3V typ.
C1
27.000MHz
AK8128C
1:VDD
N.C.:10
2:VSS
F1: 9
SW2
3:CLKIN
F0: 8
SW1
4:VSS
N.C.: 7
5:VDD
CKOUT: 6
C2
Clock Output
33.8688MHz SW2/SW1=Open/Open
36.864MHz
SW2/SW1=Open/On
12.288MHz
SW2/SW1=On/Open
24.576MHz
SW2/SW1=On/On
GND
MS1111-E-00
Sep-09
-5-
AK8128C
Package Information
2.9±0.2
6
1
5
2.8
4.0±0.2
10
0.55±0.2
0.127 +0.1
-0.05
• Mechanical data
0.1
0.5
M
0.2±0.1
1.0MAX
0゜～ 10゜
0.1
S
0.1+0.1
-0.05
S
• Marking
10
b
6
d
c
AKM
128C
8126
XXX
a
1
a:
b:
c:
d
#1 Pin Index
Part number
Date code (3 digits)
Product Family Logo
5
• RoHS Compliance
All integrated circuits form Asahi Kasei Microdevices Corporation (AKM)
assembled in “lead-free” packages* are fully compliant with RoHS.
(*) RoHS compliant products from AKM are identified with “Pb free” letter indication on
product label posted on the anti-shield bag and boxes.
Sep-09
MS1111-E-00
-6-
AK8128C
IMPORTANT NOTICE
l These products and their specifications are subject to change without notice.
When you consider any use or application of these products, please make inquiries the sales
office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to current
status of the products.
l AKM assumes no liability for infringement of any patent, intellectual property, or other rights in
the application or use of any information contained herein.
l Any export of these products, or devices or systems containing them, may require an export
license or other official approval under the law and regulations of the country of export
pertaining to customs and tariffs, currency exchange, or strategic materials.
l AKM products are neither intended nor authorized for use as critical componentsNote1) in any
safety, life support, or other hazard related device or systemNote2), and AKM assumes no
responsibility for such use, except for the use approved with the express written consent by
Representative Director of AKM. As used here:
Note1) A critical component is one whose failure to function or perform may reasonably be
expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of
the device or system containing it, and which must therefore meet very high standards of
performance and reliability.
Note2) A hazard related device or system is one designed or intended for life support or
maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other
fields, in which its failure to function or perform may reasonably be expected to result in loss
of life or in significant injury or damage to person or property.
l It is the responsibility of the buyer or distributor of AKM products, who distributes, disposes of,
or otherwise places the product with a third party, to notify such third party in advance of the
above content and conditions, and the buyer or distributor agrees to assume any and all
responsibility and liability for and hold AKM harmless from any and all claims arising from the
use of said product in the absence of such notification.
Asahi Kasei EMD Corporation has changed its company name to Asahi Kasei
Microdevices Corporation (AKM) effective 1st April 2009.
It is noted the documents according to this product, which was released before the date
of 1st April 2009, shall include the old company name as Asahi Kasei EMD Corporation
(AKEMD).
These documents will be continuously valid by interpreting the old company
MS1111-E-00
Sep-09
-7-