Micrel
APPLICATION DIAGRAM
SY604
VEE1
VEE0
SY604
C3
C4
COMP1
COMP2
C2
C1
VCC
IEXT
I REXT
VEXT
–5.2V
GROUND
REXT Calculation:
ZO = 50Ω
–2.0V
50Ω
ZO = 50Ω
–2.0V
50Ω
TRIG
TRIG
OUT
ZO = 50Ω
–2.0V
50Ω
ZO = 50Ω
OUT*
–2.0V
50Ω
REXT = (VEXT + 1.25V)/IEXT
For Example:
If Tspan is around 15ns, then IEXT is around 0.6mA, (see DC Characteristic Table) and assume IEXT pin is tied
to VCC with the resistor.
REXT = 0 + 1.25V/0.6mA
= 2.08K ohm
Location
C1–C4
REXT
Description
0.1µF ceramic capacitor
1% metal film resistor
(selected for proper Tspan)
Vendor Part Number
Erie RPE112Z5U104M50V
CB301210
Dale CMF-55C
NOTE:
The vendor numbers above are listed only as a guide. Substitution of devices with similar characteristics will not affect the performance of the SY604.
All devices should be as close as possible to the SY604.
Figure 3. Typical Connection Diagram and Parts List.
PRODUCT ORDERING CODE
Ordering
Code
SY604JC
SY604JCTR
Package
Type
J28-1
J28-1
Operating
Range
Commercial
Commercial
6