Document
June 2005 rev 0.2
ASM2P20807A
2.5V CMOS 1-TO-10 CLOCK DRIVER
Features
• High frequency > 150MHz • Guaranteed low skew < 150pS (max.) between any two
outputs • Very low duty cycle distortion < 300pS • High speed: propagation delay < 3nS • Very low CMOS power levels • TTL compatible inputs and outputs • 1:10 fanout • Maximum output rise and fall time < 1.25nS (max.) • Low input capacitance: 3pF (typ) • 2.5V Supply Voltage • Available in SSOP and QSOP Packages
Block Diagram
Product Description
The ASM2P20807A is a 2.5V compatible, high speed, low noise, 1:10 fanout, non-inverting clock buffer. The large fanout from a single input reduces loading on the preceding driver and provides an efficient clock distribution network.
Providing output to output skew as low as 150pS, the ASM20807A is an ideal clock distribution device for synchronous systems. Multiple power and grounds reduce noise. Typical applications are clock and signal distribution.
O1 O2 O3
O4 O5 IN O6 O7
O8 O9
O10
Alliance Semiconductor 2575, Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com
Notice: The information in this document is subject to change without notice.
June 2005
ASM2P20807A
rev 0.2 Pin Configuration
Pin Description Pin #
1 3,5,7,9,11,12,14,16,18,19
2,6,10,13,17 4,8,15,20
IN GND
O1 VCC
O2 GND
O3 VCC O4 GND
1 20
2 A 19 3 S 18 4 M 17
2 5 P 16
2 6 0 15 7 8 14
0 8 7 13 9 A 12
10 11
SSOP/ QSOP PACKAGE TOP VIEW
VCC O10 O9 GND
O8 VCC O7
GND 06 O5
Pin Names
IN O1-O10 GND
VCC
Description
Clock Input Clock Outputs
Ground Power supply
Capacitance (TA = +25°C, f = 1.0MHz)
Symbol
CIN
Parameter1
Input Capacitance
Conditions
VIN = 0V
NOTE:1. This parameter is measured at characterization but not tested.
Typ
Max
Unit
3 4 pF
Absolute Maximum Ratings1
Symbol
VTERM2
VTERM3
VTERM4
Description
Terminal Voltage with Respect to GND
Terminal Voltage with Respect to GND
Terminal Voltage with Respect to GND
Max
-0.5 to +4.6
-0.5 to +5.5
-0.5 to VCC+0.5
Unit
V
V
V
TSTG Storage Temperature
-65 to +150
°C
IOUT DC Output Current
-60 to +60
mA
NOTES:
1. These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect
device reliability. 2. VCC terminals. 3. Input terminals. 4. Outputs and I/O terminals.
2.5V CMOS 1-TO-10 CLOCK DRIVER
Notice: The information in this document is subject to change without notice.
2 of 11
June 2005
ASM2P20807A
rev 0.2 Power Supply Characteristics
Symbol
ICCL ICCH
∆ICC
Parameter
Quiescent
Power
Supply Current TTL
Inputs HIGH
Power Supply Current per Input HIGH
ICCD Dynamic Power Supply Current per Output3
Test Conditions1
VCC= Max VIN = GND or VCC
VCC= Max VIN = VCC -0.6V
VCC= 2.7V and 15 pF load 150 MHz
Min Typ2 Max
- 0.1 20 - 45 300 - 40 -
IC Total Power Supply VCC= Max.
Current4
CL= 12pF
VIN= VCC VIN= GND
- 65
All outputs toggling fi = 150MHz
VIN= VCC –0.6V VIN= GND
-
75
NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 2.5V, +25°C ambient. 3. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. 4. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fi) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ∆ICC = Power Supply Current for a TTL High Input (VIN = VCC -0.6V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fi = Input Frequency
90 100
Unit
µA
µA µA /MHz
mA
2.5V CMOS 1-TO-10 CLOCK DRIVER
Notice: The information in this document is subject to change without notice.
3 of 11
June 2005
ASM2P20807A
rev 0.2
DC Electrical Characteristics Over Operating Range
Following Conditions Apply Unless Otherwise Specified Industrial: TA = -40°C to +85°C, VCC = 2.5V ± 0.2V
Symbol
VIH VIL
IIH
Parameter
Test Conditions1
Input HIGH Level
Input LOW Level
Input HIGH (Input pins)
Current VCC= Max, VI = VCC
Min Typ2
1.7 --
--
IIL
Input LOW (Input pins)
Current VCC= Max, VI = GND
--
VIK Clamp Diode Voltage VCC= Min, IIN = -18mA
- -0.7
IODH Output HIGH Current
VCC= 2.5V, VIN = VIH or VIL VO = 1.25V3
-25 -45
IODL Output LOW Current
VCC= 2.5V, VIN = VIH or VIL VO = 1.25V3
20 55
Output HIGH Voltage VOH
VCC= Min VIN = VIH or VIL
IOH = -1mA IOH = -8mA
VCC–0.2 1.85
-
VOL Output LOW Voltage
VCC= Min
IOL = 1mA - -
VIN = VIH or VIL
IOL = 8mA
IOS Short Circuit Current4 VCC= Max., VO = GND3
--25 -60
NOTES: 1. For conditions shown as Max or Min, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at Vcc = 2.5V, +25°C ambient. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. This parameter is guaranteed but not tested.
5. VOH = Vcc - 0.6V at rated curre.