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8T49N012 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 8T49N012
기능 LVPECL/LVCMOS Clock Generator
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8T49N012 데이터시트, 핀배열, 회로
FemtoClock® NG Crystal-to-3.3V, 2.5V
LVPECL/LVCMOS Clock Generator with
Fanout Buffer
8T49N012
DATA SHEET
General Description
The 8T49N012 is a high performance Clock Generator with
selectable LVPECL or Single-ended outputs. The 8T49N012 can
generate selectable frequencies from a crystal or a single-ended
reference clock. The frequency is selected from the Frequency
Selection Table.
Excellent phase noise performance is maintained with IDT’s Fourth
Generation FemtoClock® NG PLL technology.
Pin Assignment
SE
VCC
XTAL_SEL
PS_SEL
VCCA
VEE
NA_DIV1
NA_DIV0
VCC_X
XTAL_OUT
XTAL_IN
VEE
CLK_IN
nOE_B
56 55 54 53 52 51 50 49 48 47 46 45 44 43
1 42
2 41
3 40
4 39
5 38
6 37
7
8T49N012
36
8 35
9 34
10 33
11 32
12 31
13 30
14 29
15 16 17 18 19 20 21 22 23 24 25 26 27 28
QC0
nQC0
QC1
nQC1
VCCO_C
QC2
nQC2
VEE
QC3
nQC3
QC4
nQC4
QC5
nQC5
Features
• Fourth Generation FemtoClock NG PLL technology
• Three differential output banks:
Bank A: selectable between four pairs of LVPECL or four pairs
of complementary LVCMOS/LVTTL outputs
Bank B: two pairs of LVPECL outputs
Bank C: six pairs of LVPECL outputs
• Selectable clock input or crystal input.
• Supports 25MHz fundamental crystal or 25MHz, 50MHz,
66.67MHz clock input
• Selectable 156.25MHz, 125MHz, 100MHz clock for Bank B and
Bank C outputs
• Selectable 156.25MHz, 125MHz, 100MHz, 250MHz, 312.5MHz,
50MHz, 25MHz, 62.5MHz or 78.125MHz for Bank A outputs
• PLL lock indication (LVCMOS output)
• RMS phase jitter at 156.25MHz (12kHz - 20MHz): 0.199ps (typical)
• Power supply modes:
Core / Output
3.3V / 3.3V
3.3V / 2.5V
2.5V / 2.5V
• -40°C to 85°C ambient operating temperature
• 56-Lead VFQFN
• Lead-free (RoHS 6) packaging
56-Lead VFQFN, 8.0mm x 8.0mm x 0.9mm
8T49N012 REVISION 1 08/21/14
1
©2014 Integrated Device Technology, Inc.




8T49N012 pdf, 반도체, 판매, 대치품
8T49N012 DATA SHEET
Table 1. Pin Descriptions1 (Continued)
Number
Name
Type
Description
31
nQC4
Output
32
QC4
Output
Differential Bank C outputs. LVPECL interface levels.
33
nQC3
Output
34
QC3
Output
Differential Bank C outputs. LVPECL interface levels.
35 VEE Power
36
nQC2
Output
37
QC2
Output
Negative power supply pin.
Differential Bank C outputs. LVPECL interface levels.
38
VCCO_C
Power
39
nQC1
Output
40
QC1
Output
Bank C output power supply pin.
Differential Bank C outputs. LVPECL interface levels.
41
nQC0
Output
42
QC0
Output
Differential Bank C outputs. LVPECL interface levels.
43
nOE_C
Input
Pulldown
Output enable for Bank C outputs. LVCMOS/LVTTL interface levels.
See the Function Configuration Tables section.
44 VEE Power
45 nQA3_CMOS Output
46
QA3_CMOS
Output
Negative power supply pin.
Selectable LVPECL differential or complementary LVCMOS/LVTTL
Bank A outputs.
47
VCCO_A
Power
48 nQA2_CMOS Output
49
QA2_CMOS
Output
Bank A output power supply pin.
Selectable LVPECL differential or complementary LVCMOS/LVTTL
Bank A outputs.
50 VEE Power
51 nQA1_CMOS Output
52
QA1_CMOS
Output
Negative power supply pin.
Selectable LVPECL differential or complementary LVCMOS/LVTTL
Bank A outputs.
53
VCCO_A
Power
54 nQA0_CMOS Output
55
QA0_CMOS
Output
Bank A output power supply pin.
Selectable LVPECL differential or complementary LVCMOS/LVTTL
Bank A outputs.
56 VEE Power
Negative power supply pin.
E-Pad
VEE Power
Negative power supply pin.
NOTE 1: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 2. Pin Characteristics
Symbol
CIN
RPULLDOWN
Parameter
Input Capacitance
Input Pulldown Resistor
CPD
Power Dissipation
Capacitance (per output)
Rout
LVCMOS Output QA[0:3]_CMOS,
Impedance
nQA[0:3]_CMOS
Test Conditions
Input Control Pins
VCC, VCC_X, VCCO_A = 3.465V
VCC, VCC_X = 3.465V,
VCCO_A = 2.625V
VCCO_A = 3.3V ± 5%
VCCO_A = 2.5V ± 5%
Minimum
Typical
3.5
51
6.5
6.5
26
30
Maximum
Units
pF
k
pF
pF
FEMTOCLOCK® NG CRYSTAL-TO-3.3V, 2.5V LVPECL/LVCMOS
CLOCK GENERATOR
4
REVISION 1 08/21/14

4페이지










8T49N012 전자부품, 판매, 대치품
8T49N012 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 the product at these conditions or any conditions beyond those listed in the DC Electrical
Characteristics or AC Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
product reliability.
Item
Supply Voltage, VCC
Inputs, VI
XTAL_IN
Other Input
Outputs, VO (LVCMOS)
Outputs, IO (LVPECL)
Continuous Current
Surge Current
Thermal Junction Temperature, TJ
Storage Temperature, TSTG
Rating
3.6V
0V to 2V
-0.5V to VCC + 0.5V
-0.5V to VCCO_A + 0.5V
50mA
100mA
125C
-65C to 150C
DC Electrical Characteristics
Table 4A. Power Supply DC Characteristics, VCC = VCC_X = VCCO_X1 = 3.3V ± 5%, VEE = 0V, TA = -40°C to 85°C
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
VCC Core Supply Voltage
VCC_X
XTAL Supply Voltage
VCCA
Analog Supply Voltage
VCCO_X
Output Supply Voltage
ICCA
Analog Supply Current
IEE Power Supply Current
Unterminated Outputs
NOTE 1: VCCO_X denotes VCCO_A, VCCO_B and VCCO_C,
3.135
3.135
3.135
3.135
3.3 3.465
3.3 3.465
3.3 3.465
3.3 3.465
42 50
332 381
Units
V
V
V
V
mA
mA
Table 4B. Power Supply DC Characteristics, VCC = VCC_X = VCCO_X1 = 2.5V ± 5%, VEE = 0V, TA = -40°C to 85°C
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
VCC Core Supply Voltage
VCC_X
XTAL Supply Voltage
VCCA
Analog Supply Voltage
VCCO_X
Output Supply Voltage
ICCA
Analog Supply Current
IEE Power Supply Current
Unterminated Outputs
NOTE 1: VCCO_X denotes VCCO_A, VCCO_B and VCCO_C,
2.375 2.5 2.625
2.375 2.5 2.625
2.375 2.5 2.625
2.375 2.5 2.625
32 41
306 354
Units
V
V
V
V
mA
mA
REVISION 1 08/21/14
7 FEMTOCLOCK® NG CRYSTAL-TO-3.3V, 2.5V LVPECL/LVCMOS
CLOCK GENERATOR

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8T49N012

LVPECL/LVCMOS Clock Generator

Integrated Device Technology
Integrated Device Technology

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