Three PLLs with deep reference, feedback, and post
dividers to provide precision clock frequencies
Multiple outputs provide several clocking options
Outputs may be tristated for board testing
S0, S1, and S2 inputs modify output frequencies for
design flexibility
3.3V operation
Accepts 5 to 30MHz crystals (see Frequency Table
for specific reference frequencies required)
Custom frequency patterns, pinouts, and packages
are available. Contact your local AMI Sales Repre-
sentative for more information.
The FS6322 is a ROM-based CMOS clock generator IC
designed to minimize cost and component count in a va-
riety of electronic systems.
Three low-jitter phase-locked loops (PLLs) drive up to five
low-skew clock outputs to provide a high degree of flexi-
bility. The device is packaged in a 16-pin SOIC to mini-
mize board space.
High-resolution divider capability permits generation of
desired frequencies.
Figure 1: Pin Configuration
CLK_C
VDD
VSS
XOUT/REFIN
XIN
CLK_E
CLK_D
CLK_F
1
2
3
16
15
14
OE
S2
VDD
S1
S0
VSS
CLK_A
CLK_B
FS6322
4
5
6
7
8
13
12
11
10
9
16-pin (0.150”) SOIC
Figure 2: Block Diagram
OE
XIN
XOUT
Crystal
Oscillator
PLL A
Clock
Logic
CLK_A
CLK_B
CLK_C
CLK_D
CLK_E
CLK_F
PLL B
PLL C
S2:S0
Device
Control
FS6322-04
This document contains information on a product under development. American Microsystems, Inc. reserves the right to change or discontinue this product without notice.
ISO9001
3.1.02
FS6322-04
Three-PLL Clock Generator IC
Table 1: Pin Descriptions
Key: AI = Analog Input; AO = Analog Output; DI = Digital Input; DI = Input with Internal Pull-Up; DI
D
= Input with Internal Pull-Down; DIO = Digital Input/Output; DI-3 = Three-Level Digital Input,
DO = Digital Output; P = Power/Ground; # = Active Low pin
U
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
TYPE
DO
P
P
AI
AO
DO
DO
DO
DO
DO
P
DI
DI
U
U
NAME
CLK_C
VDD
VSS
XOUT / REFIN
XIN
CLK_E
CLK_D
CLK_F
CLK_B
CLK_A
VSS
S0
S1
VDD
S2
OE
C clock output
DESCRIPTION
Power supply (3.3V nominal – see version specific information)
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These conditions represent a stress rating only, and functional operation of the device at
these or any other conditions above the operational limits noted in this specification is not implied. Exposure to maximum rating conditions for extended conditions may affect device performance,
functionality, and reliability.
PARAMETER
Supply Voltage, dc (V
SS
= ground)
Input Voltage, dc
Output Voltage, dc
Input Clamp Current, dc (V
I
< 0 or V
I
> V
DD
)
Output Clamp Current, dc (V
I
< 0 or V
I
> V
DD
)
Storage Temperature Range (non-condensing)
Ambient Temperature Range, Under Bias
Junction Temperature
Lead Temperature (soldering, 10s)
Input Static Discharge Voltage Protection (MIL-STD 883E, Method 3015.7)
SYMBOL
V
DD
V
I
V
O
I
IK
I
OK
T
S
T
A
T
J
MIN.
V
SS
-0.5
V
SS
-0.5
V
SS
-0.5
-50
-50
-65
-55
MAX.
7
V
DD
+0.5
V
DD
+0.5
50
50
150
125
150
260
2
UNITS
V
V
V
mA
mA
°C
°C
°C
°C
kV
CAUTION: ELECTROSTATIC SENSITIVE DEVICE
Permanent damage resulting in a loss of functionality or performance may occur if this device is subjected to a high-energy elec-
trostatic discharge.
Table 4: Operating Conditions
PARAMETER
Supply Voltage
Ambient Operating Temperature Range
Crystal Resonator Frequency
Output Load Capacitance
SYMBOL
V
DD
T
A
f
XIN
C
L
CONDITIONS/DESCRIPTION
3.3V ± 10%
MIN.
3
0
5
TYP.
3.3
MAX.
3.6
70
30
20
UNITS
V
°C
MHz
pF
3
3.1.02
FS6322-04
Three-PLL Clock Generator IC
Table 5: DC Electrical Specifications
Unless otherwise stated, V
DD
= 3.3V ± 10%, no load on any output, and ambient temperature range T
A
= 0°C to 70°C. Parameters denoted with an asterisk ( * ) represent nominal characterization
data and are not production tested to any specific limits. Where given, MIN and MAX characterization data are
±
3σ from typical. Negative currents indicate current flows out of the device.
PARAMETER
Overall
Supply Current, Dynamic, with Loaded
Outputs
Digital Inputs (OE, S2, S0)
High-Level Input Voltage
Low-Level Input Voltage
High-Level Input Current
Low-Level Input Current (pull-up)
Digital Inputs (S1)
High-Level Input Voltage
Low-Level Input Voltage
High-Level Input Current
Low-Level Input Current (pull-up)
Crystal Oscillator
Crystal Loading Capacitance
Crystal Drive Level
Clock Outputs (CLKA, CLKB)
Output Current High
Output Current Low
Short Circuit Source Current *
Short Circuit Sink Current *
Output Impedance *
SYMBOL
CONDITIONS/DESCRIPTION
MIN.
TYP.
MAX.
UNITS
I
DD
f
XTAL
= 27MHz; C
L
= 0pF, V
DD
= 3.3V
FS6322-04: S[2:0]=[100]
20
mA
V
IH
V
IL
I
IH
I
IL
V
IN
= V
DD
V
IN
= 0V
2.4
V
SS
-0.3
-1
-8
V
DD
+0.3
0.8
1
V
V
µA
µA
V
IH
V
IL
I
IH
I
IL
V
IN
= V
DD
V
IN
= 0V
2.4
V
SS
-0.3
-1
-16
V
DD
+0.3
0.8
1
V
V
µA
µA
C
L(xtal)
As seen by a crystal connected to XIN and
XOUT
R
XTAL
=20Ω
16
200
pF
uW
I
OH
I
OL
I
OSH
I
OSL
z
OH
z
OL
V
O
= 2.4V
V
O
= 0.4V
V
O
= 0V; shorted for 30s, max.
V
O
= 3.3V; shorted for 30s, max.
V
O
= 0.5V
DD
; output driving high
V
O
= 0.5V
DD
; output driving low
-4
4
-25
30
70
55
mA
mA
mA
mA
Ω
4
3.1.02
FS6322-04
Three-PLL Clock Generator IC
Table 6: AC Timing Specifications
Unless otherwise stated, V
DD
= 3.3V ± 10%, no load on any output, and ambient temperature range T
A
= 0°C to 70°C. Parameters denoted with an asterisk ( * ) represent nominal characterization
data and are not production tested to any specific limits. Where given, MIN and MAX characterization data are
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