6

SY604

Micrel

Ordering

Package

Operating

Code

Type

Range

SY604JC

J28-1

Commercial

SY604JCTR

J28-1

Commercial

PRODUCT ORDERING CODE

APPLICATION DIAGRAM

Location

Description

Vendor Part Number

C1–C4

0.1

µF ceramic capacitor

Erie RPE112Z5U104M50V

REXT

1% metal film resistor

CB301210

(selected for proper Tspan)

Dale CMF-55C

Figure 3. Typical Connection Diagram and Parts List.

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.

REXT Calculation:

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

= 0 + 1.25V/0.6mA

= 2.08K ohm

REXT

SY604

COMP1

COMP2

IEXT

OUT

OUT*

ZO = 50

Ω

–2.0V

50

Ω

ZO = 50

Ω

–2.0V

50

Ω

VEXT

REXT

I

–5.2V

GROUND

C3

C4

C2

C1

50

Ω

TRIG

ZO = 50

Ω

–2.0V

50

Ω

TRIG

ZO = 50

Ω

–2.0V