Precision Edge®
5V/3.3V DUAL DIFFERENTIAL
DATA AND CLOCK
D FLIP-FLOP w/SET AND RESET
®
Micrel, Inc.
SY100EL29V
Precision Edge
SY100EL29V
FEATURES
■ 3.3V and 5V power supply option
■ Differential D, CLK and Q
®
Precision Edge
■ Extended V range of –3.0V to –5.5V
EE
DESCRIPTION
■ V output for single-ended use
BB
■ 1100MHz min. toggle frequency
■ Asynchronous Reset and Set
The SY100EL29V is a dual differential register with
differential data (inputs and outputs) and clock. The
registers are triggered by a positive transition of the
positive clock (CLK) input. A HIGH on the Reset (Rx)
asynchronously resets the appropriate register so that
the Q outputs go LOW. A HIGH on the Set (Sx)
asynchronously resets the appropriate register so that
the Q outputs go HIGH. The Set and Reset inputs cannot
both be HIGH simultaneously.
■ Fully compatible with Motorola MC100LVEL29 and
MC100EL29
■ Available in 20-pin SOIC package
The differential input structures are clamped so that
the inputs of unused registers can be left open without
upsetting the bias network of the devices. The clamping
action will assert the /D and the /CLK sides of the inputs.
The noninverting input will pull down to V
and the
EE
inverting input will be biased around V /2. Because of
CC
the edge-triggered flip-flop nature of the devices,
simultaneously opening both the clock and data inputs
will result in an output which reaches an unidentified but
valid state.
The fully differential design of the devices makes them
ideal for very high frequency applications where a
registered data path is necessary.
PIN NAMES
TRUTH TABLE
Pin
CLK, /CLK
D[0:1], /D[0:1]
Q[0:1], /Q[0:1]
R0, R1
Function
Differential Clock Inputs
Differential Data Inputs
Differential Data Outputs
Reset Inputs
R
S
L
D
L
CLK
Z
Q
/Q
L
L
H
H
L
L
H
X
X
X
Z
L
H
H
L
L
X
L
H
H
X
H
L
S0, S1
Set Inputs
H
X
Undef
Undef
VBB
VBB Reference Output
VCC
NOTE:
Z = LOW-to-HIGH Transition
VCC
VEE
VEE
Precision Edge is a registered trademark of Micrel, Inc.
Rev.: E
Amendment:/0
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
1
Issue Date: March 2006