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8T39S04A 데이터시트 PDF




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부품번호 8T39S04A 기능
기능 Crystal or Differential to Differential Clock Fanout Buffer
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8T39S04A 데이터시트, 핀배열, 회로
Crystal or Differential to
Differential Clock Fanout Buffer
8T39S04A
Datasheet
General Description
The 8T39S04A is a high-performance clock fanout buffer. The input
clock can be selected from two differential inputs or one crystal input.
The internal oscillator circuit is automatically disabled if the crystal
input is not selected. The crystal pin can be driven by a single-ended
clock.The selected signal is distributed to four differential outputs
which can be configured as LVPECL, LVDS or HSCL outputs. In
addition, an LVCMOS output is provided. All outputs can be disabled
into a high-impedance state. The device is designed for a signal
fanout of high-frequency, low phase-noise clock and data signal. The
outputs are at a defined level when inputs are open or tied to ground.
It is designed to operate from a 3.3V or 2.5V core power supply, and
either a 3.3V or 2.5V output operating supply.
Block Diagram
PullDown
PullDown
Features
Two differential reference clock input pairs
Differential input pairs can accept the following input levels:
LVPECL, LVDS, HCSL, HSTL and Single-ended
Crystal Oscillator Interface
Crystal input frequency range: 10MHz to 40MHz
Maximum Output Frequency
LVPECL - 2GHz
LVDS - 2GHz
HCSL - 250MHz
LVCMOS - 250MHz
Two banks, each has two differential output pairs that can be
configured as LVPECL or LVDS or HCSL
One single-ended reference output with synchronous enable to
avoid clock glitch
Output skew: 80ps (maximum), Bank A and Bank B at the same
output level
Part-to-part skew: 200ps (typical), design target
Additive RMS phase jitter @ 156.25MHz, (12kHz - 20MHz):
34.7fs (typical), 3.3V/ 3.3V
Supply voltage modes:
VDD/VDDO
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V
-40°C to 85°C ambient operating temperature
Lead-free (RoHS 6) packaging
Pin Assignment
REFOUT
24 23 22 21 20 19 18 17
nc 25
16
nCLK1 26
15
CLK1 27
14
VDD 28
REFOUT 29
8T39S04A
13
12
VDDOREF 30
11
OE_SE 31
10
SMODE1 32
9
12345678
REF_SEL1
nCLK0
CLK0
REF_SEL0
XTAL_OUT
XTAL_IN
VDD
SMODE0
©2016 Integrated Device Technology, Inc.
32-pin, 5mm x 5mm VFQFN Package
1 May 20, 2016




8T39S04A pdf, 반도체, 판매, 대치품
8T39S04A Datasheet
Function Tables
Table 3A. REF_SELx Function Table
Control Input
REF_SEL[1:0]
Selected Input Reference Clock
00 (default)
CLK0, nCLK0
01 CLK1, nCLK1
10 XTAL
11 XTAL
Table 3B. OE_SE Function Table
OE_SE
REFOUT
0 (default)
High-Impedance
1 Enabled
NOTE: Synchronous output enable to avoid clock glitch.
Table 3C. Input/Output Operation Table, OE_SE
Input Status
OE_SE
REF_SEL [1:0] CLKx and nCLKx
0 (default)
Don’t care
Don’t Care
1
10 or 11
Don’t Care
CLK0 and nCLK0 are both open circuit
CLK0 and nCLK0 are tied to ground
1 00 (default)
CLK0 is high, nCLK0 is low
CLK0 is low, nCLK0 is high
CLK1 and nCLK1 are both open circuit
CLK1 and nCLK1 are tied to ground
1 01
CLK1 is high, nCLK1 is low
CLK1 is low, nCLK1 is high
Output State
REFOUT
High Impedance
Fanout Crystal Oscillator
Logic Low
Logic Low
Logic High
Logic Low
Logic Low
Logic Low
Logic High
Logic Low
Table 3D. Output Level Selection Table, QX[0:1], nQX[0:1]
SMODE1
SMODE0
Output Type
0 0 LVPECL (default)
0 1 LVDS
1 0 HCSL
1 1 High-Impedance
NOTE: X denotes A and B.
©2016 Integrated Device Technology, Inc.
4
May 20, 2016

4페이지










8T39S04A 전자부품, 판매, 대치품
8T39S04A Datasheet
Table 4B. Power Supply DC Characteristics, VDD = 3.3V±5%, VDDOA = VDDOB = VDDOREF = 2.5V±5%, GND = 0V, TA = -40°C to 85°C
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum Units
VDD Power Supply Voltage
3.135
3.3
3.465
V
VDDOA,
VDDOB, VDDOREF
Output Supply Voltage
2.375
2.5
2.625
V
IDD
IDDOA + IDDOB
Power Supply Current
Output Supply Current1
SMODE[1:0] = 01
SMODE[1:0] = 01
80 100 mA
80 100 mA
IEE
Power Supply Current
SMODE[1:0] = 00 (default)
110 130 mA
IDD
Power Supply Current
SMODE[1:0] = 10
80 100 mA
IDDOA + IDDOB
Output Power Supply
Current2
SMODE[1:0] = 10
40 50 mA
NOTE 1. Differential outputs are terminated with 100.
NOTE 2. Differential outputs are running at 250MHz and floating.
Table 4C. Power Supply DC Characteristics, VDD = VDDOA = VDDOB = VDDOREF = 2.5V±5%, GND = 0V, TA = -40°C to 85°C
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum Units
VDD Power Supply Voltage
2.375
2.5
2.625
V
VDDOA,
VDDOB, VDDOREF
Output Supply Voltage
2.375
2.5
2.625
V
IDD
IDDOA + IDDOB
Power Supply Current
Output Supply Current1
SMODE[1:0] = 01
SMODE[1:0] = 01
70 85 mA
80 95 mA
IEE
Power Supply Current
SMODE[1:0] = 00 (default)
95 115 mA
IDD
Power Supply Current
SMODE[1:0] = 10
70 80 mA
IDDOA + IDDOB
Output Power Supply
Current2
SMODE[1:0] = 10
40 50 mA
NOTE 1. Differential outputs are terminated with 100.
NOTE 2. Differential outputs are running at 250MHz and floating.
©2016 Integrated Device Technology, Inc.
7
May 20, 2016

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부품번호상세설명 및 기능제조사
8T39S04A

Crystal or Differential to Differential Clock Fanout Buffer

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