Module Data Sheet: VCT2000A 155.520MHz

Application: LVPECL Output-Dual Input Clock Generator

Page 3 of 5

Rev. “7” 6/02/03

2.8

Dual Reference input (+/- 30ppm)

8

kHz

2.9

Output loads @ Vcc-2.00V

50

Ω

3.0

MECHANICAL CHARACTERISTICS

Pkg. size is 1 in (25.40 mm) X 1.05 in (26.67 mm) X 0.32 in (8.13 mm) max on an FR4 board

with castellated pins. Overall coplanarity is .004 in (0.101mm).

VCT2000A Outline and Dimensions

Pin Descriptions

Pin #

Pin Name

Pin Description

1

ENABLE/TRI-STATE

VCXO Enable (Enable = 0, Disable = 1 = CMOS Outputs Tri-stated)

2, 3, 14,

15

No Connection

No Connection

4

REFA

8kHz CMOS Reference Frequency Input

5

SELA/B

Input Reference Select Pin (REFA = 0, REFB = 1)

6

RESET

RESET (RESET = 1)

7

REFB

8kHz CMOS Reference Frequency Input

8, 17

GND

Ground

9

FRstatus

Free Run Status (FR = 1)

10

Vcc

Supply Voltage

11

Optional

Reserved for Optional Use

12

ALARM

Loss of Reference / Lock alarm (Alarm = 1)

13

FR

Force Free Run (Phase Lock = 0, Free Run = 1)

16

/Q

LVPECL Complementary Output

18

Q

LVPECL Output