ASM2P20805A Datasheet, PDF (1/11 Pages) Alliance Semiconductor Corporation – 2.5V CMOS Dual 1-To-5 Clock Driver

June 2005
ASM2P20805A
rev 0.2
2.5V CMOS Dual 1-To-5 Clock Driver
Features
ƒ Advanced CMOS Technology
ƒ Guaranteed low skew < 200pS (max.)
ƒ Very low propagation delay < 2.5nS (max)
ƒ Very low duty cycle distortion < 270pS (max)
ƒ Very low CMOS power levels
ƒ Operating frequency up to 166MHz
ƒ TTL compatible inputs and outputs
ƒ Two independent output banks with 3-state control
ƒ 1:5 fanout per bank
ƒ "Heartbeat" monitor output
ƒ V_CC = 2.5V ± 0.2V
ƒ Available in SSOP and QSOP packages
Functional Description
The ASM2P20805A is a 2.5V Clock driver built using
advanced CMOS technology. The device consists of two
banks of drivers, each with a 1:5 fanout and its own output
enable control. The device has a "heartbeat" monitor for
diagnostics and PLL driving. The MON output is identical to
all other outputs and complies with the output specifications
in this document. The ASM2P20805A offers low
capacitance inputs. The ASM2P20805A is designed for
high speed clock distribution where signal quality and skew
are critical. The ASM2P20805A also allows single point-to-
point transmission line driving in applications such as
address distribution, where one signal must be distributed
to multiple receivers with low skew and high signal quality.
Block Diagram
OE_A
IN_A
IN_B
OE_B
5
OA₁ – OA₅
5
OB₁ – OB₅
MON
Pin Diagram
V_CCA
OA₁
OA₂
OA₃
GND_A
OA₄
OA₅
GND_Q
OE_A
IN_A
1
20
2
19
A
3
S
18
M
4
2
17
5
P
16
2
6
0
15
7
8
14
0
8
5
13
A
9
12
10
11
V_CCB
OB₁
OB₂
OB₃
GND_B
OB₄
OB₅
MON
OE_B
IN_B
Alliance Semiconductor
2575, Augustine Drive • Santa Clara, CA • Tel: [phone] • Fax: [phone] • www.alsc.com
Notice: The information in this document is subject to change without notice.