VSC837UG Vitesse Semiconductor Corp., VSC837UG Datasheet

VSC837UG

Manufacturer Part Number

VSC837UG

Description

3.2 Gb/s 68x68 crosspoint switch

Manufacturer

Vitesse Semiconductor Corp.

Datasheet

1.VSC837UG.pdf (26 pages)

Specifications of VSC837UG

Case

BGA

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Current page: 1 of 26
Download datasheet (343Kb)

G52309-0, Rev 3.0

02/16/01

Preliminary Data Sheet

VSC837

Features

General Description

streams. The non-blocking switch core is programmed through a triple-mode port interface that allows random

access programming of each input/output port. A high degree of signal integrity is maintained throughout the

chip via fully differential signal paths.

multiplexer that can be programmed to one and only one of its 68 inputs. The signal path is unregistered and

fully asynchronous, so there are no restrictions on the phase, frequency, or signal pattern at each input.

for maximum signal integrity. Data inputs are terminated on die through 100 resistors between true and com-

plement inputs (see Input Termination section for further detail).

data or one of two forms of parallel data. The input-referred mode (burst mode) allows an input port to be routed

to all outputs in only 4 program cycles. Core programming can be random for each port address, or multiple

program assignments can be queued and issued simultaneously. The programming may be initialized to a

“straight-through” configuration (A0 to Y0, A1 to Y1, etc.) using the INITB pin.

speed input via an internal 69th multiplexer.

a subset of the channels. Power-down can be accomplished in hardware, via dedicated power pins for pairs of

input and output channels, or in software by programming individual unused outputs with a disable code.

VSC837 Block Diagram

• 68 Input by 68 Output Crosspoint Switch

• 3.2Gb/s NRZ Data Bandwidth

• 66MHz Multi-Mode Programming Port

• TTL/2.5V CMOS Control I/O (3.3V tolerant)

• Programmable On-Chip I/O Termination

• Input Signal Activity (ISA) Monitoring Function

• Integrated Signal Equalization (ISE) for

Deterministic Jitter Reduction

The VSC837 is a monolithic 68x68 asynchronous crosspoint switch, designed to carry broadband data

The crosspoint function is based on a multiplexer array architecture. Each data output is driven by a 68:1

Each high-speed output is a fully differential switched current driver with switchable on-die terminations

An activity monitor is provided to allow in-system diagnostics. The activity monitor can observe any high-

Unused channels may be powered down to allow efficient use of the switch in applications that require only

A triple-mode programming interface is provided that allows programming commands to be sent as serial

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

VITESSE

SEMICONDUCTOR CORPORATION

A67

Internet: www.vitesse.com

control

• Single 2.5V Supply

• Differential CML Output Driver

• 11W typ/14W max (low drive mode)

• Hard and Soft Power-Down for Unused Channels

• High Performance 37.5mm, 480 TBGA Package

13W typ/16W max (high drive mode)

Y67

68x68 Crosspoint Switch

3.2Gb/s

Page 1

Related parts for VSC837UG

VSC837UG Summary of contents

Page 1

Preliminary Data Sheet VSC837 Features • 68 Input by 68 Output Crosspoint Switch • 3.2Gb/s NRZ Data Bandwidth • 66MHz Multi-Mode Programming Port • TTL/2.5V CMOS Control I/O (3.3V tolerant) • Programmable On-Chip I/O Termination • Input Signal Activity (ISA) ...

Page 2

Crosspoint Switch Functional Block Diagram A, AN[0:67] CONFIG INITB Functional Description Input / Output Characteristics All input data must be differential and should be nominally biased to +2.0V or AC-coupled. Other levels are allowed as described under the ...

Page 3

Preliminary Data Sheet VSC837 Programming Interface Parallel Mode In parallel mode (SERIAL=0, BURST=0), the binary word on INCHAN[6:0] is the numerical identifier of the input that will be routed to the specified output. OUTCHAN[6:0] is the numerical identifier of the ...

Page 4

Crosspoint Switch Burst Mode Burst mode programming (BURST=1, SERIAL=0) enables an input to be broadcast to any group outputs with a single command. In this mode, rising edges on the LOAD pin will trigger ...

Page 5

Preliminary Data Sheet VSC837 AC Characteristics Table 1: Data Path Symbol f Maximum Data Rate RATE t Channel-to-channel delay skew SKW t Propagation Delay from an A input output PDAY High-speed input rise/fall times, ...

Page 6

Crosspoint Switch Figure 1: Parallel Mode—Separate Address/Data (leave ALE_SCN pin HIGH) OUTCHAN[6:0] Output Address INCHAN[6:0] Input Address t LOAD t sCSB CSB CONFIG t sSERIAL SERIAL Figure 2: Parallel Mode—Multiplexed Address/Data Output Address INCHAN[6:0] ALE_SCN LOAD t sCSB ...

Page 7

Preliminary Data Sheet VSC837 Figure 4: Serial Mode (leave ALE_SCN pin LOW during programming) INCHAN0_SDIN sSDIN INCHAN1_SCLK SDOUT LOAD CSB CONFIG t sSERIAL SERIAL O(n) = Output Address Bit (n), I(n) = Input Address Bit (n) t ...

Page 8

Crosspoint Switch DC Characteristics All characteristics are over the specified operating conditions. Table 3: Power Supply Requirements Symbol Parameter I V supply current CC CC Total chip power (with terminations ON, high drive) Table 4: ...

Page 9

Preliminary Data Sheet VSC837 I/O Equivalent Circuits 50 PAD H/S Input Equivalent Circuit Input Termination The high-speed inputs of the VSC837 are internally terminated by a 100 plement inputs. Termination resistors are isolated from each other on-chip. The termination will ...

Page 10

Crosspoint Switch Output Termination The high-speed outputs of the VSC837 are internally back terminated by 50 TERM_CTRL pin is HIGH. When this pin is LOW, the output driver functions as an open-drain CML driver. Setting DRIVE_CTRL LOW (GND) ...

Page 11

Preliminary Data Sheet VSC837 Package Pin Descriptions OUTCHAN10 OUTCHAN11 OUTCHAN14 OUTCHAN13 0 4 OUTCHAN12 INCHAN2 INCHAN1_SCLK INCHAN0_SDIN INCHAN3 1 5 INCHAN4 © VITESSE SEMICONDUCTOR CORPORATION ...

Page 12

Crosspoint Switch Table 10: Package Pin Identifications Signal Name Pin High-Speed Data Inputs A0 D23 A1 AH23 A2 B23 A3 AF23 A4 D22 A5 AH22 A6 B22 A7 AF22 A8 D21 A9 AH21 A10 B21 A11 AF21 A12 ...

Page 13

Preliminary Data Sheet VSC837 Signal Name Pin A36 D14 A37 AH14 A38 B14 A39 AF14 A40 D13 A41 AH13 A42 B13 A43 AF13 A44 D12 A45 AH12 A46 B12 A47 AF12 A48 D11 A49 AH11 A50 B11 A51 AF11 A52 ...

Page 14

Crosspoint Switch Signal Name Pin AN7 AE22 AN8 E21 AN9 AJ21 AN10 A21 AN11 AE21 AN12 E20 AN13 AJ20 AN14 A20 AN15 AE20 AN16 E19 AN17 AJ19 AN18 A19 AN19 AE19 AN20 E18 AN21 AJ18 AN22 A18 AN23 ...

Page 15

Preliminary Data Sheet VSC837 Signal Name Pin AN46 A12 AN47 AE12 AN48 E11 AN49 AJ11 AN50 A11 AN51 AE11 AN52 E10 AN53 AJ10 AN54 A10 AN55 AE10 AN56 E9 AN57 AJ9 AN58 A9 AN59 AE9 AN60 E8 AN61 AJ8 AN62 ...

Page 16

Crosspoint Switch Signal Name Pin Y16 L28 Y17 L4 Y18 L26 Y19 L2 Y20 M28 Y21 M4 Y22 M26 Y23 M2 Y24 N28 Y25 N4 Y26 N26 Y27 N2 Y28 P28 Y29 P4 Y30 P26 Y31 P2 Y32 ...

Page 17

Preliminary Data Sheet VSC837 Signal Name Pin Y55 Y2 Y56 AA28 Y57 AA4 Y58 AA26 Y59 AA2 Y60 AB28 Y61 AB4 Y62 AB26 Y63 AB2 Y64 AC28 Y65 AC4 Y66 AC26 Y67 AC2 YN0 G29 YN1 G5 YN2 G25 YN3 ...

Page 18

Crosspoint Switch Signal Name Pin YN26 N25 YN27 N1 YN28 P29 YN29 P5 YN30 P25 YN31 P1 YN32 R29 YN33 R5 YN34 R25 YN35 R1 YN36 T29 YN37 T5 YN38 T25 YN39 T1 YN40 U29 YN41 U5 YN42 ...

Page 19

Preliminary Data Sheet VSC837 Signal Name Pin YN65 AC5 YN66 AC25 YN67 AC1 Control Pins ACTCLK AD2 ACTIVITY AD1 Address Latch Enable for Multiplexed Parallel Mode; Scan Enable for Serial ALE_SCN AD25 BURST AH6 CMV AD3 CONFIG F27 CSB AF6 ...

Page 20

Crosspoint Switch Signal Name Pin OUTCHAN14 C24 OUTCHAN15 F29 OUTCHAN16 F28 OUTCHAN17 F25 OUTCHAN18 F26 SDOUT AG6 SERIAL AE6 TERM_CTRL AD5 Power Supplies VEE C23 VEE C7 VEE R3 VEE AG7 VEE AG23 VEE R27 VCC A1 VCC ...

Page 21

Preliminary Data Sheet VSC837 Signal Name Pin VCC AF26 VCC AF27 VCC AF28 VCC AF29 VCC AF3 VCC AF4 VCC AF5 VCC AG1 VCC AG2 VCC AG25 VCC AG26 VCC AG27 VCC AG28 VCC AG29 VCC AG3 VCC AG4 VCC ...

Page 22

Crosspoint Switch Signal Name Pin VCC B25 VCC B26 VCC B27 VCC B28 VCC B29 VCC B3 VCC B4 VCC B5 VCC C1 VCC C2 VCC C25 VCC C26 VCC C27 VCC C28 VCC C29 VCC C3 VCC ...

Page 23

Preliminary Data Sheet VSC837 Signal Name Pin VEEP_T2 C21 VEEP_T3 C20 VEEP_T4 C19 VEEP_T5 C18 VEEP_T6 C17 VEEP_T7 C16 VEEP_T8 C15 VEEP_T9 C14 VEEP_T10 C13 VEEP_T11 C12 VEEP_T12 C11 VEEP_T13 C10 VEEP_T14 C9 VEEP_T15 C8 VEEP_B1 AG22 VEEP_B2 AG21 VEEP_B3 ...

Page 24

Crosspoint Switch Signal Name Pin VEEP_L11 V3 VEEP_L12 W3 VEEP_L13 Y3 VEEP_L14 AA3 VEEP_L15 AB3 VEEP_L16 AC3 VEEP_R0 G27 VEEP_R1 H27 VEEP_R2 J27 VEEP_R3 K27 VEEP_R4 L27 VEEP_R5 M27 VEEP_R6 N27 VEEP_R7 P27 VEEP_R9 T27 VEEP_R10 U27 VEEP_R11 ...

Page 25

Preliminary Data Sheet VSC837 Package Information - 37.5mm 480 BGA © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 G52309-0, Rev 3.0 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com 02/16/01 VITESSE SEMICONDUCTOR CORPORATION 00.30 ...

Page 26

Crosspoint Switch Ordering Information The order number for this product is formed by a combination of the device type and package type. Device Type 3.2Gb/s 68x68 Crosspoint Switch Notice Vitesse Semiconductor Corporation (“Vitesse”) provides this document for informational ...

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