Precision Edge®
SY10H842
®
PrecisionSEYd10g0eH842
SY10H842
Micrel, Inc.
SINGLE SUPPLY QUAD
PECL-TO-TTL OUTPUT ENABLE
SY100H842
FEATURES
■ Translates positive ECL-to-TTL (PECL-to-TTL)
■ 300ps pin-to-pin skew
®
Precision Edge
■ 500ps part-to-part skew
DESCRIPTION
■ Differential internal design for increased noise
immunity and stable threshold inputs
The SY10/100H842 are single supply, low skew
translating 1:4 clock drivers.
■ VBB reference output
■ Single supply
The devices feature a 24mA TTL output stage, with
AC performance specified into a 50pF load capacitance.
A HIGH on the enable pin (EN) forces all outputs LOW.
As frequencies increase to 40MHz and above, precise
timing and shaping of clock signals becomes extremely
important. The H842 solves several clock distribution
problems such as minimizing skew 300ps), maximizing
clock fanout (24mA drive), and precise duty cycle control
through a proprietary differential internal design.
■ Enable input
■ Extra TTL and ECL power/ground pins to reduce
cross-talk/noise
■ High drive capability: 24mA each output
■ Fully compatible with industry standard 10K, 100K
I/O levels
■ Available in 16-pin SOIC package
The 10K version is compatible with 10KH ECL logic
levels. The 100K version is compatible with 100K levels.
BLOCK DIAGRAM
PIN NAMES
Pin
Function
TTL Ground (0V)
TTL Outputs
GT
VT
TTL VCC (+5.0V)
Q
Q
Q
Q
0
1
2
3
VE
ECL VCC (+5.0V)
GE
ECL Ground (0V)
D, D
VBB
Q0 - Q3
EN
Signal Input (PECL)
VBB Reference Output (PECL)
Signal Outputs (TTL)
Enable Input (PECL)
ECL Input
D
D
VBB
EN
Precision Edge is a registered trademark of Micrel, Inc.
Rev.: F
Amendment:/0
M9999-032906
hbwhelp@micrel.com or (408) 955-1690
1
Issue Date: March 2006