AK8128A

AK8128A
Single Clock Generator
AK8128A
Features
Description
Output Frequency Range:
72.25MHz, （74.25/1.001）MHｚ
The AK8128A is a single clock generator IC with
an integrated PLL. It can generate a clock for
High-Definition display 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.
148.5MHｚ, (148.5/1.001)MHz
Input Frequency:
27MHz
Low Jitter Performance:
20 ps (Typ.) Period, 1
220ps(Typ.) 1000cycle long term, p-p
Low Current Consumption:
8mA (Typ.)
Output Load:
15pF (max.) for 74.25MHz
10pF (max.) for 148.5MHz
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）
1
or
1.001
PLL
CKOUT
(74.25/74.176
148.5/148.352MHz)
(74.25MHz
or
148.5MHz)
F0
N.C.
N.C.
F1
VSS
AK8128A Single Clock Generator
MS1054-E-04
Dec-2013
-1-
AK8128A
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)
CKOUT
F1
F0
N.C(GND)
N.C.
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
N.C
--
Connect to VSS
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
CKOUT
OUT
Description
Clock Output
(1) Internal pull down 400k(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
CKOUT1 (MHz)
74.25
74.25/1.001
148.5
148.5/1.001
Ordering Information
Part Number
Marking
Shipping Packaging
Package
Temperature
Range
AK8128A
128A
Tape and Reel
10-pin TMSOP
-20 to 85 ℃
Dec-2013
MS1054-E-04
-2-
AK8128A
Absolute Maximum Rating
Over operating free-air temperature range unless otherwise noted
Items
Supply Voltage
Input Voltage
Symbol
Ratings
Unit
VDD
-0.3 to 4.6
V
Vin
VSS-0.3 to VDD+0.3
V
IIN
±10
mA
Tstg
-55 to 130
C
Input Current (any pins except supplies)
Storage Temperature
(1)
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
Max
Unit
85
C
3.3
3.6
V
27
Input Clock Duty Cycle
Output Load Capacitance
Typ
30
50
MHz
70
%
Cp1
74.25MHz, 74.175MHz
15
pF
Cp2
148.5MHz,148.351MHz
10
pF
Note:
(1) Power to VDDs requires to be supplied from a single source.
supply line should be installed close to each VDD pin.
MS1054-E-04
A decoupling capacitor of 0.1F for power
Dec-2013
-3-
AK8128A
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
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
IL 2
Pin: F0,F1
Input Current 2
High Level Output
Voltage
VOH
Low Level Output
Voltage
VOL
Current Consumption
IDD
Pin: CLKOUT
IOH=-4mA
MIN
TYP
MAX
Unit
0.7VDD
V
0.3VDD
V
-10
+10
μA
-20
+20
μA
0.8VDD
V
Pin: CLKOUT
IOL=+4mA
No load @74.25MHz
8
(VDD=3.3V, Ta=25℃)
0.2VDD
V
12
mA
AC Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta: -20 to +85℃, Input Frequency: 27MHz,
unless otherwise noted
Parameter
Symbol
Conditions
Output Clock Duty Cycle
MIN
TYP
MAX
Unit
45
50
55
%
Output Clock Rise Time
trise
0.2VDD to 0.8VDD
1.2
2.0
ns
Output Clock Fall Time
tfall
0.2VDD to 0.8VDD
1.2
2.0
ns
Output Clock Jitter 1
Jit1
20
100
ps
Output Clock Jitter 2
Jit2
220
350
ps
1
3
ms
Output Lock Time
(1)
tlock
Period, 
1 in 10000 sampling
Long term 1000 cycle p-p
±3 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
Dec-2013
MS1054-E-04
-4-
AK8128A
Package Information
0.127 +0.1
-0.05
0.55±0.2
 Mechanical data
2.9±0.2
6
1
5
2.8
4.0±0.2
10
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
128A
8126
XXX
a
1
a:
#1 Pin Index
b:
Part number
c:
Date code (3 digits)
d
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.
MS1054-E-04
Dec-2013
-5-
AK8128A
IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the
information contained in this document without notice. When you consider any use or application of
AKM product stipulated in this document (“Product”), please make inquiries the sales office of AKM
or authorized distributors as to current status of the Products.
1. All information included in this document are provided only to illustrate the operation and application
examples of AKM Products. AKM neither makes warranties or representations with respect to the
accuracy or completeness of the information contained in this document nor grants any license to any
intellectual property rights or any other rights of AKM or any third party with respect to the
information in this document. You are fully responsible for use of such information contained in this
document in your product design or applications. AKM ASSUMES NO LIABILITY FOR ANY
LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE USE OF SUCH
INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that require
extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which may
cause loss of human life, bodily injury, serious property damage or serious public impact, including
but not limited to, equipment used in nuclear facilities, equipment used in the aerospace industry,
medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic
signaling equipment, equipment used to control combustions or explosions, safety devices, elevators
and escalators, devices related to electric power, and equipment used in finance-related fields. Do not
use Product for the above use unless specifically agreed by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you are responsible
for complying with safety standards and for providing adequate designs and safeguards for your
hardware, software and systems which minimize risk and avoid situations in which a malfunction or
failure of the Product could cause loss of human life, bodily injury or damage to property, including
data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any information
contained in this document for any military purposes, including without limitation, for the design,
development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile
technology products (mass destruction weapons). When exporting the Products or related technology
or any information contained in this document, you should comply with the applicable export control
laws and regulations and follow the procedures required by such laws and regulations. The Products
and related technology may not be used for or incorporated into any products or systems whose
manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations.
5. Please contact AKM sales representative for details as to environmental matters such as the RoHS
compatibility of the Product. Please use the Product in compliance with all applicable laws and
regulations that regulate the inclusion or use of controlled substances, including without limitation, the
EU RoHS Directive. AKM assumes no liability for damages or losses occurring as a result of
noncompliance with applicable laws and regulations.
6. Resale of the Product with provisions different from the statement and/or technical features set forth in
this document shall immediately void any warranty granted by AKM for the Product and shall not
create or extend in any manner whatsoever, any liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior
written consent of AKM.
Dec-2013
MS1054-E-04
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