VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC837

3.2Gb/s

68x68 Crosspoint Switch

G52309-0, Rev 3.0

Page 19

02/16/01

© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012

Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com

Internet: www.vitesse.com

YN65

AC5

High-Speed Data Output Channel 65, Complement

CML

YN66

AC25

High-Speed Data Output Channel 66, Complement

CML

YN67

AC1

High-Speed Data Output Channel 67, Complement

CML

Control Pins

ACTCLK

AD2

Clock for Activity Monitor (<10MHz)

TTL

ACTIVITY

AD1

ActivityResult from Previous ACTCLK Period

TTL

ALE_SCN

AD25

Address Latch Enable for Multiplexed Parallel Mode; Scan Enable for Serial

Mode. See Figures 2 through 6 for Proper Use.

TTL

BURST

AH6

Logic HIGH sets Burst Mode

TTL

CMV

AD3

Output Drive Current Control (leave floating)

ANALOG

CONFIG

F27

Logic HIGH Transfers Programming to Main Program Memory

TTL

CSB

AF6

Chip Select (active LOW)

TTL

DRIVE_CTRL

AD4

Output Drive Current Switch (LOW = 10mA, HIGH = 20mA)

TTL

INCHAN0_SDIN

AG24

Input Channel, Bit 0 and Serial Data in Serial Mode

TTL

INCHAN1_SCLK

AF24

Input Channel, Bit 1 and Serial Clock in Serial Mode

TTL

INCHAN2

AE24

Input Channel, Bit 2

TTL

INCHAN3

AH24

Input Channel, Bit 3

TTL

INCHAN4

AJ24

Input Channel, Bit 4

TTL

INCHAN5

AD27

Input Channel, Bit 5

TTL

INCHAN6

AD26

Input Channel, Bit 6

TTL

INITB

AJ6

INITB=0 Forces “Straight-Through” Program

TTL

ITC

AD29

Input Termination Control (GND = floating input termination,

ANALOG

LOAD

AD28

Rising Edge Writes Data in Parallel and Burst Modes,

See Figure 5 for Serial Mode

TTL

OUTCHAN0

F1

Output Channel, Bit 0

TTL

OUTCHAN1

F2

Output Channel, Bit 1

TTL

OUTCHAN2

F5

Output Channel, Bit 2

TTL

OUTCHAN3

F4

Output Channel, Bit 3

TTL

OUTCHAN4

F3

Output Channel, Bit 4

TTL

OUTCHAN5

A6

Output Channel, Bit 5

TTL

OUTCHAN6

B6

Output Channel, Bit 6

TTL

OUTCHAN7

E6

Output Channel, Bit 7 (burst mode only)

TTL

OUTCHAN8

D6

Output Channel, Bit 8 (burst mode only)

TTL

OUTCHAN9

C6

Output Channel, Bit 9 (burst mode only)

TTL

OUTCHAN10

A24

Output Channel, Bit 10 (burst mode only)

TTL

OUTCHAN11

B24

Output Channel, Bit 11 (burst mode only)

TTL

OUTCHAN12

E24

Output Channel, Bit 12 (burst mode only)

TTL

OUTCHAN13

D24

Output Channel, Bit 13 (burst mode only)

TTL

Signal Name

Pin

Function

Level