Series
ICs for use with Crystal Oscillators
NCMOS
: Low Supply Current
■Applications
GCrystal
Oscillator Modules
GCommunication
Equipment
GMicrocomputers
GClock
Units in Motor Control
GSystem
Clocks on Boards
GTimers
GPalmtops
NOscillator
Frequency : 4MHz ~ 70MHz
NBuilt-In
Oscillator Capacitors
NDivider
Ratio
N3-State
Output
NSupply
Voltage
: 5.0V
NMini
Mold SOT-26 Package
: fo/1, fo/2, fo/4, fo/8
■General Description
The XC2151 series are a group of high frequency, CMOS low power
crystal oscillators with oscillator & divider circuitry, oscillator capacitors
and amplifier feedback resistors built-in.
An oscillator circuit can be created from just an external crystal.
Output frequency can be selected from four frequencies :
Fundamental f0/1, Divided f0/2, f0/4, f0/8.
The output buffer is 3-State and has a fanout of 10 - TTL.
■Features
High Precision
: Built-in oscillator capacitors
16pF TYP (or selectable from 10 ~ 20pF)
: On-chip amplifier feedback resistor
5MΩ TYP (or selectable from 1.6kΩ ~
8.4kΩ)
Oscillator Frequency
: 4MHz ~ 70MHz
Divider Ratio
: Selectable from f0/1, f0/2, f0/4, f0/8
Output
: 3-State, 10 - TTL fanout
Operating Voltage Range
: 4.0V ~ 6.0V
Small Quiescent Current
Stand-By Function
Low Cost
: Oscillator circuit can be created from just
an external crystal
Ultra Small Package
: SOT-26 (150mW) mini mold
■Pin Configuration
XT
６
V
DD
５
Q
O
４
■Pin Assignment
PIN NUMBER
1
2
3
4
5
6
PIN NAME
/INH
XT
V
SS
Q
0
V
DD
/XT
FUNCTION
Control *
Oscillator Connection (Input)
GND
Output
Power Supply
Oscillator Connection (Output)
SOT-26
(TOP VIEW)
1
INH
２
XT
３
V
SS
* Control pin has pull-up resistor built-in.
■INH, Q
0
Pin Function
XC2151x51
/INH
"H"
"L"
open
Q0
Output
High Impedance (oscillator stopped)
Output
14
XC2151x55
/INH
"H"
"L"
open
Q0
Output
High Impedance (oscillator stopped)
Output
"H" = High Level
"L" = Low Level
1023
XC2151
Series
■Product Classification
GOrdering
Information
Ｘ Ｃ ２ １ ５ １Ｘ Ｘ Ｘ Ｘ Ｘ Ｘ
↑↑↑↑↑↑↑↑
½b c d e f g h
DESIGNATOR
DESCRIPTION
Supply Voltage :
5 = 5.0V
Product Series :
1 = Large output capability,
fundamental & overtone
Duty Level :
A = CMOS (V
DD
/2) & TTL
C = CMOS (V
DD
/2)
T = TTL
Output Capability :
5 = 10TTL
DESIGNATOR
DESCRIPTION
Stand-by Mode and Divider Ratio :
1=f0/1 (CE), 2=f0/2 (CE), 4=f0/4 (CE),
8=f0/8 (CE), 5=f0/1 (OE)
Fundamental / Overtone Rf, Cg, Cd :
(please refer to electrical characteristics tables)
Package :
M = SOT-26
a
b
e
f
c
g
d
h
Device Orientation :
R= Embossed Tape (Standerd Feed)
L= Embossed Tape (Reverse Feed)
■Marking
q
Represents the Divider Ratio
MARK
A
B
RATIO
f0/1
f0/2
MARK
C
D
RATIO
f0/4
f0/8
q
w
e
r
SOT-26
(TOP VIEW)
w
Represents Stand-by Mode, Duty Level & Output Capability
MARK
5
6
7
8
STAND-BY MODE
CE
CE
CE
OE
DUTY LEVEL
CMOS (V
DD
/2), TTL
CMOS (V
DD
/2)
TTL
XC2151T=TTL ,
XC2151C=CMOS
OUTPUT CAPABILITY
10TTL
10TTL
10TTL
10TTL
e
Represents Fundamental / Overtone and Rf, Cg, Cd
14
r
Represents the Assembly Lot No.
(based on internal standards)
1024
XC2151
Series
■Block Diagram
1) XC2151A Series
V
DD
C
g
R
UP
Rf
C
d
Q
O
XT
XT
INH
1/2
1/2
1/2
V
SS
2) XC2151T/C Series
V
DD
C
g
R
UP
C
d
Q
O
XT
V
SS
XT
INH
■Absolute Maximum Ratings
PARAMETER
Supply Voltage
Input Voltage
Power Dissipation
Operating Ambient Temp.
Storage Temp.
SYMBOL
V
DD
V
IN
Pd
Topr
Tstg
CONDITIONS
V
SS
- 0.3 ~ V
SS
+ 7.0
V
SS
- 0.3 ~ V
DD
+ 0.3
150
-30 ~ +75
-55 ~ +125
UNITS
V
V
mW
O
C
O
C
14
1025
XC2151
Series
■Electrical Characteristics
XC2151T51A / 55A (overtone)
V
DD
=5.0V, Fosc=20MHz, No Load, Ta = 25°C
PARAMETER
Operating Supply Voltage
Input Voltage 'High'
Input Voltage 'Low'
Output Current 'High'
Output Current 'Low'
Supply Current 1
Supply Current 2 (51A)
Supply Current 2 (55A)
Input Pull-Up Resistance
Internal Oscillator Capacitance
Internal Oscillator Feedback Resistance
Output Disable Leakage Current
SYMBOL
V
DD
V
IH
V
IL
I
OH
I
OL
I
DD1
I
DD2
I
DD2
R
UP
Cg,Cd
Rf
I
OZ
CONDITIONS
MIN
4.0
2.4
V
OH
= 4.6V
V
OL
= 0.4V
/ INH = OPEN, Q
0
= OPEN
/ INH = "L"
/ INH = "L"
/ INH = 4.5V
see note below
/ INH = "L"
- 10
16
18
2
16
50
18
5.0
20
5.5
25
5
23
200
22
6.1
10
TYP
MAX
6.0
0.4
UNITS
V
V
V
mA
mA
mA
µA
mA
kΩ
pF
kΩ
µA
note : the values for Cg,Cd are the designed values.
XC2151T51D / 55D (overtone)
V
DD
=5.0V, Fosc=70MHz, No Load, Ta = 25°C
PARAMETER
Operating Supply Voltage
Input Voltage 'High'
Input Voltage 'Low'
Output Current 'High'
Output Current 'Low'
Supply Current 1
Supply Current 2 (51D)
Supply Current 2 (55D)
Input Pull-Up Resistance
Internal Oscillator Capacitance
Internal Oscillator Feedback Resistance
Output Disable Leakage Current
SYMBOL
V
DD
V
IH
V
IL
I
OH
I
OL
I
DD1
I
DD2
I
DD2
R
UP
Cg,Cd
Rf
I
OZ
CONDITIONS
MIN
4.0
2.4
V
OH
= 4.6V
V
OL
= 0.4V
/ INH = OPEN, Q
0
= OPEN
/ INH = "L"
/ INH = "L"
/ INH = 4.5V
see note below
/ INH = "L"
- 10
16
25
2
23
50
9
2.7
10
3.0
35
5
32
200
11
3.3
10
TYP
MAX
6.0
0.4
UNITS
V
V
V
mA
mA
mA
µA
mA
kΩ
pF
kΩ
µA
note : the values for Cg,Cd are the designed values.
XC2151T (overtone)
PART No.
DUTY LEVEL
TTL
TTL
TTL
TTL
OUTPUT
10TTL
10TTL
10TTL
10TTL
DIVIDER RATIO
f0 / 1
f0 / 1
f0 / 1
f0 / 1
Rf (k
Ω)
5.5
4.0
3.0
3.0
Cg/Cd (pF)
20
20
13
10
RECOMMENDED
FREQUENCY RANGE
20MHz
30MHz
43MHz
55MHz
to 33MHz
to 45MHz
to 57MHz
to 70MHz
14
XC2151T51A
XC2151T51B
XC2151T51C
XC2151T51D
1026
XC2151
Series
XC2151C51F / 55F (overtone)
V
DD
=5.0V, Fosc=20MHz, No Load, Ta = 25°C
PARAMETER
Operating Supply Voltage
Input Voltage 'High'
Input Voltage 'Low'
Output Current 'High'
Output Current 'Low'
Supply Current 1
Supply Current 2 (51F)
Supply Current 2 (55F)
Input Pull-Up Resistance
Internal Oscillator Capacitance
Internal Oscillator Feedback Resistance
Output Disable Leakage Current
SYMBOL
V
DD
V
IH
V
IL
I
OH
I
OL
I
DD1
I
DD2
I
DD2
R
UP
Cg,Cd
Rf
I
OZ
CONDITIONS
MIN
4.0
2.4
V
OH
= 4.6V
V
OL
= 0.4V
/ INH = OPEN, Q
0
= OPEN
/ INH = "L"
/ INH = "L"
/ INH = 4.5V
see note below
/ INH = "L"
- 10
16
18
2
16
50
18
5.0
20
5.5
25
5
23
200
22
6.1
10
TYP
MAX
6.0
0.4
UNITS
V
V
V
mA
mA
mA
µA
mA
kΩ
pF
kΩ
µA
note : the values for Cg,Cd are the designed values.
XC2151C51L / 55L (overtone)
V
DD
=5.0V, Fosc=70MHz, No Load, Ta = 25°C
PARAMETER
Operating Supply Voltage
Input Voltage 'High'
Input Voltage 'Low'
Output Current 'High'
Output Current 'Low'
Supply Current 1
Supply Current 2 (51L)
Supply Current 2 (55L)
Input Pull-Up Resistance
Internal Oscillator Capacitance
Internal Oscillator Feedback Resistance
Output Disable Leakage Current
SYMBOL
V
DD
V
IH
V
IL
I
OH
I
OL
I
DD1
I
DD2
I
DD2
R
UP
Cg,Cd
Rf
I
OZ
CONDITIONS
MIN
4.0
2.4
V
OH
= 4.6V
V
OL
= 0.4V
/ INH = OPEN, Q
0
= OPEN
/ INH = "L"
/ INH = "L"
/ INH = 4.5V
see note below
/ INH = "L"
- 10
16
25
2
23
50
9
2.7
10
3.0
35
5
32
200
11
3.3
10
TYP
MAX
6.0
0.4
UNITS
V
V
V
mA
mA
mA
µA
mA
kΩ
pF
kΩ
µA
note : the values for Cg,Cd are the designed values.
XC2151C (overtone)
PART No.
XC2151C51F
XC2151C51H
XC2151C51K
XC2151C51L
DUTY LEVEL
CMOS (V
DD
/2)
CMOS (V
DD
/2)
CMOS (V
DD
/2)
CMOS (V
DD
/2)
OUTPUT
10TTL
10TTL
10TTL
10TTL
DIVIDER RATIO
f0 / 1
f0 / 1
f0 / 1
f0 / 1
Rf (k
Ω)
5.5
4.0
3.0
3.0
Cg/Cd (pF)
20
20
13
10
RECOMMENDED
20MHz to 33MHz
30MHz to 45MHz
43MHz to 57MHz
55MHz to 70MHz
14
1027
