Micrel, Inc.
SY100S336
TRUTH TABLE(1)
Inputs
MR S2 S1 S0 CEP D0/CET D3
L
L
L
L
X
X
X
L
L
L
H
X
X
X
L
L
H
L
X
X
X
L
L
H
H
X
X
X
L
H
L
L
L
L
X
L
H
L
L
H
L
X
L
H
L
L
X
H
X
L
H
L
H
X
L
H
H
L
L
L
H
H
L
H
L
H
H
L
X
X
X
L
X
L
X
H
X
L
H
H
H
X
X
X
H
L
L
L
X
H
L
L
H
X
H
L
H
L
X
H
L
H
H
X
H
H
L
L
X
H
H
L
L
X
H
H
L
H
X
H
H
H
L
X
H
H
H
H
X
X
X
X
X
X
X
X
X
L
X
H
X
X
X
X
X
X
X
NOTE:
1. H = High Voltage Level
L = Low Voltage Level
X = Don't Care
u = LOW-to-HIGH Transition
x = L if Q0 – Q3 = LLLL
H if Q0 – Q3 ≠ LLLL
≠ = L if Q0 – Q3 = HHHH
H if Q0 – Q3 ≠ HHHH
* Before the clock, TC is Q3; after the clock, TC is Q2
Outputs
CP Q0 Q1 Q2 Q3 TC
Mode
u P0 P1 P2 P3
L
Preset (Parallel Load)
u Q0 Q1 Q2 Q3
L
Invert
u Q1 Q2 Q3 D3 D3 Shift Left
u D0 Q0 Q1 Q2 Q3* Shift Right
u
(Q0–3) minus 1
x Count Down
X Q0 Q1 Q2 Q3 x Count Down with CEP
Not Active
X Q0 Q1 Q2 Q3 H Count Down with CET
Not Active
uL
L
L
L
H Clear
u
(Q0–3) plus 1
≠ Count Up
X Q0 Q1 Q2 Q3
≠
Count Up with CEP
Not Active
X Q0 Q1 Q2 Q3 H Count Up with CET
Not Active
X Q0 Q1 Q2 Q3 H Hold
XL
L
L
L
L Asynchronous Master
XL
L
L
L
L Reset
XL
L
L
L
L
XL
L
L
L
L
XL
L
L
L
L
XL
L
L
L
H
XL
L
L
L
H
XL
L
L
L
H
XL
L
L
L
H
DC ELECTRICAL CHARACTERISTICS
VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND
Symbol
IIH
IEE
Parameter
Min.
Typ.
Max.
Unit
Input HIGH Current, All Inputs
—
—
200
µA
Power Supply Current
–170
–145
–90
mA
Condition
VIN = VIH (Max.)
Inputs Open
M9999-032206
hbwhelp@micrel.com or (408) 955-1690
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