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PDF ICD2053B Data sheet ( Hoja de datos )
| Número de pieza | ICD2053B | |
| Descripción | Programmable Clock Generator | |
| Fabricantes | Cypress | |
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( DataSheet : www.DataSheet4U.com )
ICD2053B
Programmable Clock Generator
Features
• Clock outputs ranging from 391 kHz to 100 MHz (TTL
levels) or 90 MHz (CMOS levels)
• 2-wire serial interface facilitates programmable output
frequency
• Phase-Locked Loop oscillator input derived from exter-
nal reference clock (1 MHz to 25 MHz) or External Crys-
tal (2 MHz to 24 MHz)
• Three-State output control disables output for test pur-
poses
• Sophisticated internal loop filter requires no external
components or manufacturing tweaks as commonly re-
quired with external filters
• Low power consumption makes device ideal for power-
and space-critical applications
• 8-pin 150-mil packaging achieves minimum footprint
for space-critical applications
• 5V operation
• High-speed CMOS technology
Functional Description
The ICD2053B Programmable Clock Generator offers a fully
user-programmable phase-locked loop in a single 8-pin pack-
age. The output may be changed “on the fly” to any desired
frequency value between 391 kHz and 100 MHz (90 MHz at
CMOS levels). The ICD2053B is ideally suited for any design
in which package size, power, and/or frequency programma-
bility are important design issues.
The ability to dynamically change the output frequency adds a
whole new degree of freedom for the designer. Some exam-
ples of the uses for this device include: laptop computers, in
which slowing the speed of operation can mean less power
consumption; graphics board dot clocks to allow dynamic syn-
chronization of different brands of monitors or display formats;
on-board test strategies where the ability to skew a system’s
desired frequency (e.g., ±10%) allows worst-case evaluation.
Logic Block Diagram
Pin Configuration
XTALIN
XTALOUT
SCLK
DATA
MUXREF/OE
Top View
XTALOUT
1
8 XTALIN
SCLK
2
7 MUXREF/OE
GND
3
6 VDD
DATA
4
5 CLKOUT
.comREFERENCE
et4UOSCILLATOR
÷Q f(REF)
f OUT
PLL
÷2P f OUT
MUX
÷2N
She7 7
5
3
www.DataCONTROL LOGIC
2053b-1
CLKOUT
VDD GND
2053b-2
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
August 1994 - Revised October 1995
1 page  
ICD2053B
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Supply Voltage to Ground Potential .................−0.5V to +7.0V
Input Voltage ................................................... −0.5V to VDD+0.5
Operating Temperature ......................................0°C to +70°C
Storage Temperature ....................................... −65°C to +150°C
Max. Soldering Temperature (10 sec) ..................... +260°C
Junction Temperature ............................................... +125°C
Operating Conditions
Parameter
VDD
TA
CL
Description
Supply Voltage
Ambient Operating Temperature
Load Capacitance
Static Discharge Voltage ......................................... Class 1[3]
(per MIL-STD-883, Method 3015)
Operating Range
Range
Ambient
Temperature
Commercial
0°C to +70°C
Note:
3. Static sensitive <2000V.
VDD
5V ± 10%
Min.
4.5
0
Max.
5.5
70
25
Unit
V
°C
pF
Electrical Characteristics Over the Operating Range
Parameter
VOH
VOL
VIH
VIL
VIH
Description
HIGH-level Output Voltage
LOW-level Output Voltage
HIGH-level Input Voltage
LOW-level Input Voltage
HIGH-level Reference Input Voltage,when
DC coupled[4]
Test Conditions
IOH = −4.0 mA
IOL = 4.0 mA
Except XTALIN pins
Except XTALIN pins
XTALIN pin only
VIL
LOW-level Reference Input Voltage, when XTALIN pin only
DC coupled[4]
IIH Input HIGH Current
IIL Input LOW Current
IIH Input HIGH Current
IIL Input LOW Current
IOZ Output Leakage Current
IDD Power Supply Current
VIN = 5.0V, except SCLK
VIN = 0.5V, except SCLK
VIN = 5.0V, SCLK only
VIN = 0.5V, SCLK only
Three-state
VDD=VDD max., 100 MHz,
VIN=VDD or 0V
Min.
2.4
2.0
VDD−0.8
13
Max.
0.4
0.8
Unit
V
V
V
V
V
0.8 V
100
−250
250
−100
10
50
µA
µA
µA
µA
µA
mA
Capacitance
Parameter
CIN
CIN
Description
Input Capacitance, except XTALIN pin
Input Capacitance, XTALIN pin
Max.
10
34
Unit
pF
pF
Switching Characteristics Over the Operating Range
Parameter
Name
Description
Min.
Max. Unit
f(REF)
Reference Frequency
Reference Oscillator nominal value[4]
1 25 MHz
t(REF)
Reference Clock Period t(REF) = 1/f(REF)
40
1000
ns
t1
Reference Clock HIGH
Time
Input pulse width HIGH for reference. Measured at
VDD/2, DC coupled.[4]
16
ns
Note:
4. See Externally Driven Crystal Oscillator section of the “Crystal Oscillator Topics” Application Note. For AC coupling, use an input duty cycle near 50%.
5
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