AK8172A
MS1369-E-00 Mar-12
- 1 -
Features
Output Frequency Range:
72.36MHz
Input Frequency:
27.000MHz
Low Jitter Performance:
15 ps (Typ.) Period,1σ
Low Current Consumption:
3.6mA (Typ.)
Output Load:
15pF (max.)
Supply Voltage:
VDD:1.7-1.9V
Operating Temperature Range:
-20 to +85℃
Package:
4-pin USON(lead free)
Body size: 1.3 mm x 1.1mm
Description
The AK8172A is a single clock generator IC with
an integrated PLL. It can generate a 72.36MHz
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.
Applications
Digital still camera
Block Diagram
AK8172A Single Clock Generator
Single Clock Generator
AK8172A
CLKIN
VDD
VSS
CLKOUT
PLL
OUTPUT
Buffer
INPUT
Buffer
AK8172A
Mar-12 MS1369-E-00
- 2 -
Pin Descriptions
Package: 4-Pin USON (Top View)
*lead-free
Pin
Name
Pin
Type
Description
VDD
--
Power Supply
CLKOUT
OUT
Clock output
Output clock frequency is 72.36MHz.
CLKIN
IN
Clock input． (27MHz) 1.8V or 3.3V available.
When CLKIN connects VDD or VSS, CLKOUT outputs low.
VSS
--
Ground.
Ordering Information
Part Number
Marking
Shipping Packaging
Package
Temperature
Range
AK8172AU
72A(AK8172A)
Tape and Reel
4-pin USON
-20 to 85 ℃
3:CLKIN
4:VSS
1:VDD
2:CLKOUT
AK8172A
MS1369-E-00 Mar-12
- 3 -
Absolute Maximum Rating
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 3.6
V
Input Current (any pins except supplies)
IIN
±10
mA
Storage Temperature
Tstg
-55 to 130
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.
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
Symbol
Conditions
Min
Typ
Max
Unit
Operating Temperature
Ta
-20
85
C
Supply Voltage (1)
VDD
1.7
1.8
1.9
V
Input Clock Frequency
Fin
27.0000
MHz
Input Clock Duty Cycle
Findc
At VDDI/2
30
50
70
%
Output Load Capacitance
Cpl
Pin: CLKOUT
15
pF
(1) A decoupling capacitor of 0.1F for power supply line should be installed close to each VDD pin.
ESD Sensitive Device
AK8172A
Mar-12 MS1369-E-00
- 4 -
DC Characteristics
All specifications at VDD: over 1.7 to 1.9V, Ta: -20 to +85℃, Input Frequency: 27MHz,
unless otherwise noted
Parameter
Symbol
Conditions
MIN
TYP
MAX
Unit
High Level Input Voltage (1)
VIH
Pin: CLKIN
0.7VDDI
V
Low Level Input Voltage(1)
VIL
Pin: CLKIN
0.3VDDI
V
Input Current
IL 1
Pin: CLKIN
-1
+1
μA
High Level Output
Voltage
VOH
Pin: CLKOUT
IOH=-4mA
0.8VDD
V
Low Level Output
Voltage
VOL
Pin: CLKOUT
IOL=+4mA
0.2VDD
V
Current Consumption
IDD
No load
3.6
mA
(1) VDDI=1.7-1.9V, 2.7-3.6V. VDDI means XO operation voltage.
AC Characteristics
All specifications at VDD: over 1.7 to 1.9V, Ta: -20 to +85℃, Input Frequency: 27MHz,
unless otherwise noted
(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
(3) Design value
Parameter
Symbol
Conditions
MIN
TYP
MAX
Unit
Output Clock Frequency
Fo
CLKIN=27MHz
72.36
MHz
Output Clock Duty Cycle(2) (3)
Fodc
At VDD/2
45
50
55
%
Output Clock Rise Time(2) (3)
trise
0.2VDD to 0.8VDD
4.0
ns
Output Clock Fall Time(2) (3)
tfall
0.2VDD to 0.8VDD
4.0
ns
Output Clock Jitter (2) (3)
Jit
Period, 1
15
ps
Output Lock Time(1)
tlock
Power-up
0.2
ms
AK8172A
MS1369-E-00 Mar-12
- 5 -
Package Information
Mechanical data (Units:mm)
M
0.05
1.10±0.05
1.30±0.05
S
0.05
0.50
0.25±0.05
0.58＋0.02
－0.03
0.525±0.05
C0.05
0.25±0.05
S
Marking
a: #1 Pin Index
b: Part number
c: Date code (3 digits)
AKM is the brand name of AKM’s IC’s.
AKM and the logo - - are the brand of AKM’s IC’s and identify that AKM
continues to offer the best choice for high performance mixed-signal solution under
this brand.
a
b
c
7
A
Y M A
2
AK8172A
Mar-12 MS1369-E-00
- 6 -
RoHS Compliance
IMPORTANT NOTICE
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.
AKM assumes no liability for infringement of any patent, intellectual property, or other rights in
the application or use of any information contained herein.
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.
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.
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.
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.