CF5037 series
2.5V LVDS Output Oscillator ICs
OVERVIEW
The CF5037 series are 2.5V operation, LVDS output oscillator ICs. They support 80MHz to 250MHz 3rd over-
tone oscillation and 80MHz to 700MHz fundamental oscillation. The CF5037 series can be used to construct
high-frequency LVDS output oscillators.
FEATURES
I
I
I
I
2.375 to 3.6V operating supply voltage range
Operating frequency range (varies with version)
• 80MHz to 700MHz fundamental oscillation
• 80MHz to 250MHz 3rd overtone oscillation
– 40 to 85°C operating temperature range
LVDS output
I
I
I
I
Standby function
• Outputs are high impedance when OE is LOW.
(oscillator stops)
Power-saving pull-up resistor built-in (pin OE)
BiCMOS process
Chip form (CF5037××)
SERIES CONFIGURATION
Version
CF5037A1
CF5037B1
CF5037B2
*2
CF5037C1
CF5037C2
CF5037D1
(CF5037D2)
(CF5037E1)
(CF5037E2)
(CF5037F1)
(CF5037F2)
(CF5037V1)
(CF5037V2)
Oscillator constants determined
by external components
(R
f
, C
XIN
, C
XOUT
)
Fundamental
Fundamental
or
3rd overtone
Oscillation mode
Recommended operating
frequency range
*1
[MHz]
80 to 120
100 to 180
Output frequency
f
O
f
O
f
O
/2
f
O
f
O
/2
f
O
f
O
/2
f
O
f
O
/2
f
O
f
O
/2
f
O
80 to 400
f
O
/2
150 to 250
250 to 400
400 to 600
600 to 700
*1. The recommended operating frequency is a yardstick value derived from the crystal used for NPC characteristics authentica-
tion. However, the oscillator frequency band is not guaranteed. Specifically, the characteristics can vary greatly due to crystal
characteristics and mounting conditions, so the oscillation characteristics of components must be carefully evaluated.
*2. Minimum output frequency: 80MHz
Note. These versions in parentheses ( ) are under development. Please ask our Sales & Marketing section for further detail.
ORDERING INFORMATION
Device
CF5037××–1
Package
Chip form
SEIKO NPC CORPORATION —1
CF5037 series
PAD LAYOUT
(Unit:
µm)
OUT OUTN VCC2 OE
8
7
6
5
(1100,1300)
Y
TEST
9
DB5037
1
2
3
4
(0,0)
VCC
XIN XOUT GND
X
Chip size: 1.10
×
1.30mm
Chip thickness: 300 ± 30µm
PAD size: 150µm
×
100µm (VCC, OUT, OUTN pins)
100µm
×
100µm (excluding VCC, OUT, OUTN pins)
Chip base: GND potential
Note: The TEST pin is not used during normal operation.
PIN DESCRIPTION and PAD DIMENSIONS
Pad dimensions [µm]
Pad No.
1
2
3
4
5
6
7
8
9
Name
VCC
XIN
XOUT
GND
OE
VCC2
OUTN
OUT
TEST
I/O
–
I
O
–
I
–
O
O
I
(+) supply pin
Oscillator input pin
Oscillator output pin
(–) ground pin
Output enable pin. Outputs are high impedance when LOW (oscillator
stopped). Power-saving pull-up resistor built-in.
(+) output buffer supply pin
Output pin (complementary)
Output pin (true)
IC test pin. Leave open circuit for normal operation.
Function
X
160
511
740
965
896
756
523
244
136
Y
130
130
130
130
1170
1170
1170
1170
678
SEIKO NPC CORPORATION —2
CF5037 series
BLOCK DIAGRAM
VCC
XIN
Colpitts
OSC
1/2
LVDS
VCC2
OUT
OUTN
XOUT
OE
GND
OSCILLATOR CIRCUIT CONSTANT
The CF5037 series oscillator setting varies with device version to optimize characteristics over the recom-
mended operating frequency range.
Version
CF5037A1
CF5037B×
CF5037C×
CF5037D×
CF5037E×
CF5037F×
Fundamental
Oscillation mode
Fundamental
or
3rd overtone
Built-in capacitance
*1 *2
[pF]
C
XIN
12
8
6
5
(5)
(4)
C
XOUT
12
8
6
5
(5)
(4)
Recommended operating
frequency range
*2 *3
[MHz]
80 to 120
100 to 180
150 to 250
250 to 400
(400 to 600)
(600 to 700)
*1. The oscillator internal capacitance values includes parasitic capacitance.
*2. Values in parentheses ( ) are provisional only.
*3. The recommended operating frequency is a yardstick value derived from the crystal used for NPC characteristics authentication. How-
ever, the oscillator frequency band is not guaranteed. Specifically, the characteristics can vary greatly due to crystal characteristics
and mounting conditions, so the oscillation characteristics of components must be carefully evaluated.
Oscillator Equivalent Circuit
C0 cancel
C
XIN
XIN
R
PD1
R
f
C
XOUT
XOUT
Oscillator block equivalent circuit
The CF5037 series oscillator circuit has a C0 cancel circuit built-in to improve the oscillator margin. If power is applied when there is an
open circuit between XIN and XOUT, self oscillation may occur, which is not abnormal. Users should confirm that the oscillator operates
normally when a crystal unit is connected.
SEIKO NPC CORPORATION —3
CF5037 series
Electrical Characteristics
3.3V operation
V
CC
= 3.0 to 3.6V, GND = 0V, Ta =
−40
to +85°C unless otherwise noted.
Rating
*1
Parameter
Symbol
Conditions
Min
Current consumption 1
Current consumption 2
HIGH-level output voltage
LOW-level output voltage
Differential output voltage
Differential output error
Offset voltage
Offset error
Output leakage current
HIGH-level input voltage
LOW-level input voltage
LOW-level input current 1
LOW-level input current 2
Pull-down resistance 1
I
EE1
I
EE2
V
OH
V
OL
V
OD
∆V
OD
V
OS
∆V
OS
I
Z
V
IH
V
IL
I
IL1
I
IL2
R
PD1
Measurement cct. 1,
OE = open
5037A1, B×, C×, D×
5037E×, F×
–
–
–
–
0.9
247
–
1.125
–
–
0.7V
CC
–
−2
−20
12
Typ
45
(53)
–
1.43
1.1
330
–
1.25
–
–
–
–
–
–
24
Max
66
(73)
30
1.6
–
454
50
1.375
50
10
–
0.3V
CC
−20
−200
48
mA
mA
µA
V
V
mV
mV
V
mV
µA
V
V
µA
µA
kΩ
Unit
Measurement cct. 1, OE = LOW
Measurement cct. 1, OE = open, R
L
= 100Ω,
OUT, OUTN pins, f = 100MHz
Measurement cct. 1, OE = open, R
L
= 100Ω,
OUT–OUTN differential voltage, f = 100MHz
Measurement cct. 1, OE = open, R
L
= 100Ω,
OUT–OUTN mid-level potential, f = 100MHz
Measurement cct. 2, OE = LOW, OUT, OUTN pins
Measurement cct. 1, OE pin
Measurement cct. 1, OE pin
Measurement cct. 1, V
IL
= 0V, OE pin
Measurement cct. 1, V
IL
= 0.7V
CC
, OE pin
Measurement cct. 2, XIN pin
*1. Values in parentheses ( ) are provisional only.
2.5V operation
V
CC
= 2.375 to 2.625V, GND = 0V, Ta =
−40
to +85°C unless otherwise noted.
Rating
*1
Parameter
Symbol
Conditions
Min
Current consumption 1
Current consumption 2
HIGH-level output voltage
LOW-level output voltage
Differential output voltage
Differential output error
Offset voltage
Offset error
Output leakage current
HIGH-level input voltage
LOW-level input voltage
LOW-level input current 1
LOW-level input current 2
Pull-down resistance 1
I
EE1
I
EE2
V
OH
V
OL
V
OD
∆V
OD
V
OS
∆V
OS
I
Z
V
IH
V
IL
I
IL1
I
IL2
R
PD1
Measurement cct. 1,
OE = open
5037A1, B×, C×, D×
5037E×, F×
–
–
–
–
0.9
247
–
1.125
–
–
0.7V
CC
–
−2
−10
12
Typ
43
(51)
–
1.43
1.1
330
–
1.25
–
–
–
–
–
–
24
Max
63
(70)
30
1.6
–
454
50
1.375
50
10
–
0.3V
CC
−20
−150
48
mA
mA
µA
V
V
mV
mV
V
mV
µA
V
V
µA
µA
kΩ
Unit
Measurement cct. 1, OE = LOW
Measurement cct. 1, OE = open, R
L
= 100Ω,
OUT, OUTN pins, f = 100MHz
Measurement cct. 1, OE = open, R
L
= 100Ω,
OUT–OUTN differential voltage, f = 100MHz
Measurement cct. 1, OE = open, R
L
= 100Ω,
OUT–OUTN mid-level potential, f = 100MHz
Measurement cct. 2, OE = LOW, OUT, OUTN pins
Measurement cct. 1, OE pin
Measurement cct. 1, OE pin
Measurement cct. 1, V
IL
= 0V, OE pin
Measurement cct. 1, V
IL
= 0.7V
CC
, OE pin
Measurement cct. 2, XIN pin
*1. Values in parentheses ( ) are provisional only.
SEIKO NPC CORPORATION —5
京公网安备 11010802033920号
EEWORLD
