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83905AK-01LF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
DATA SHEET
Low Skew, 1:6 Crystal-to-LVCMOS
Fanout Buffer
83905-01
83905-01 REVISION 1 05/01/15 1 ©2015 Integrated Device Technology, Inc.
General Description
The 83905-01 is a low skew, 1-to-6 LVCMOS Fanout Buffer. The low
impedance LVCMOS outputs are designed to drive 50 series or
parallel terminated transmission lines. The effective fanout can be
increased from 6 to 12 by utilizing the ability of the outputs to drive
two series terminated lines.
The 83905-01 is characterized at full 1.8V, 1.5V, and 1.2V, mixed
1.8V/1.5V, 1.8V/1.2V and 1.5V/1.2V output operating supply mode.
Guaranteed output skew characteristics along with the 1.2V output
capabilities makes the 83905-01 ideal for high performance, single
ended applications that also require a limited output voltage.
Pin Assignments
Features
• Six LVCMOS outputs
• Outputs able to drive 12 series terminated lines
• Crystal Oscillator Interface
• Crystal input frequency range: 10MHz to 40MHz
• Output skew: 95ps (maximum)
• RMS phase jitter @ 25MHz, (100Hz – 1MHz): 0.17ps (typical)
Offset
Noise Power
100Hz................. -115 dBc/Hz
1kHz ................... -138 dBc/Hz
10kHz ................. -154 dBc/Hz
100kHz ............... -160 dBc/Hz
• Synchronous output enables
• Power supply modes: Full 1.8V, 1.5V, 1.2V
Mixed 1.8V core/1.5V output operating supply
Mixed 1.8V core/1.2V output operating supply
Mixed 1.5V core/1.2V output operating supply
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) package
Block Diagram
20-pin, 4mm x 4mm VFQFN Package
83905-01
GND
GND
BCLK4
V
DDO
BCLK5
GND
GND
BCLK2
V
DD
BCLK3
6
7
8910
20
19
18 17
16
ENABLE2
XTAL_OUT
nc
ENABLE1
XTAL_IN
BCLK1
V
DDO
BCLK0
GND
GND
2
3
4
5
1
15
14
13
12
11
83905-01
16-pin, 4.4mm x 5.0mm TSSOP Package
BCLK4
V
DDO
BCLK5
ENABLE1
XTAL_IN
V
DD
BCLK3
GND
V
DDO
BCLK0
GND
ENABLE2
XTAL_OUT
BCLK2
GND
BCLK1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SYNCHRONIZE
SYNCHRONIZE
BCLK0
BCLK1
BCLK2
BCLK3
BCLK4
BCLK5
XTAL_IN
XTAL_OUT
ENABLE 1
ENABLE 2
83905-01 DATA SHEET
LOW SKEW, 1:6 CRYSTAL-TO-LVCMOS FANOUT BUFFER 2 REVISION 1 05/01/15
Pin Descriptions and Characteristics
Table 1. Pin Descriptions
Table 2. Pin Characteristics
Function Table
Table 3. Clock Enable Function Table
Figure 1. Enable Timing Diagram
Name Type Description
XTAL_OUT Output Crystal oscillator interface.
XTAL_IN Input Crystal oscillator interface.
ENABLE1, ENABLE2 Input Clock enable. LVCMOS/LVTTL interface levels. See Table 3.
BCLK0, BCLK1, BCLK2,
BCLK3, BCLK4, BCLK5
Output Clock outputs. LVCMOS interface levels.
GND Power Power supply ground.
V
DD
Power Power supply pin.
V
DDO
Power Output supply pin.
nc Unused No connect.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
C
IN
Input Capacitance ENABLE[2:1] 4 pF
C
PD
Power Dissipation Capacitance
(per output)
V
DDO
= 2.0V 12 pF
V
DDO
= 1.6V 12 pF
V
DDO
= 1.26V 12 pF
R
OUT
Output Impedance
V
DDO
= 1.8V ± 0.2V 17
V
DDO
= 1.5V ± 0.1V 18
V
DDO
= 1.2V ± 5% 24
Control Inputs Outputs
ENABLE 1 ENABLE2 BCLK[0:4] BCLK5
0 0 LOW LOW
0 1 LOW Toggling
1 0 Toggling LOW
1 1 Toggling Toggling
BCLK5
BCLK[0:4]
ENABLE2
ENABLE1
REVISION 1 05/01/15 3 LOW SKEW, 1:6 CRYSTAL-TO-LVCMOS FANOUT BUFFER
83905-01 DATA SHEET
Absolute Maximum Ratings
NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress
specifications only. Functional operation of product at these conditions or any conditions beyond those listed in the DC Characteristics or AC
Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.
DC Electrical Characteristics
Table 4A. Power Supply DC Characteristics, V
DD
= V
DDO
= 1.8V ±0.2V, T
A
= 0°C to 70°C
NOTE 1: Measured with outputs unterminated, and XTAL_IN and XTAL_OUT floated.
Table 4B. Power Supply DC Characteristics, V
DD
= V
DDO
= 1.5V ±0.1V, T
A
= 0°C to 70°C
NOTE 1: Measured with outputs unterminated, and XTAL_IN and XTAL_OUT floated.
Table 4C. Power Supply DC Characteristics, V
DD
= V
DDO
= 1.2V ±5%, T
A
= 0°C to 70°C
NOTE 1: Measured with outputs unterminated, and XTAL_IN and XTAL_OUT floated.
Item Rating
Supply Voltage, V
DD
4.6V
Inputs, V
I
-0.5V to V
DD
+ 0.5V
Input, V
I
Crystal Oscillator Input 0V to V
DD
Outputs, V
O
-0.5V to V
DDO
+ 0.5V
Package Thermal Impedance, T
J
125C
Storage Temperature, T
STG
-65C to 150C
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
DD
Power Supply Voltage 1.6 1.8 2.0 V
V
DDO
Output Supply Voltage 1.6 1.8 2.0 V
I
DD
; NOTE 1 Power Supply Current ENABLE [1:2] = 00 4 10 mA
I
DDO
; NOTE 1 Output Supply Current ENABLE [1:2] = 00 1 mA
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
DD
Power Supply Voltage 1.4 1.5 1.6 V
V
DDO
Output Supply Voltage 1.4 1.5 1.6 V
I
DD
; NOTE 1 Power Supply Current ENABLE [1:2] = 00 3 7 mA
I
DDO
; NOTE 1 Output Supply Current ENABLE [1:2] = 00 1 mA
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
DD
Power Supply Voltage 1.14 1.2 1.26 V
V
DDO
Output Supply Voltage 1.14 1.2 1.26 V
I
DD
; NOTE 1 Power Supply Current ENABLE [1:2] = 00 2 6 mA
I
DDO
; NOTE 1 Output Supply Current ENABLE [1:2] = 00 1 mA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

83905AK-01LF

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