89TSF552BL datasheet(8/30 Pages) IDT

Part #	89TSF552BL

Description	Traffic Manager Co-processor

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Manufacturer	IDT [Integrated Device Technology]

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March 3, 2005

IDT 89TTM553

Signal Name

I/O Type

Dir.

Freq.

Remarks

FLQS_DIN[14:0]

FLQS_DIN_PRTY

1.5V HSTL Class 1

I

175 MHz

Control serial interface to 89TTM552

(15 signal lines + 1 parity line)

FLQS_DOUT[19:0]

FLQS_DOUT_PRTY

1.5V HSTL Class 1

O

175 MHz

Control serial interface to 89TTM552

(20 signal lines + 1 parity line)

FLQS_CLKIN

1.5V HSTL Class 1

I

175 MHz

Clock input from 89TTM552

FLQS_CLKOUT

1.5V HSTL Class 1

O

175 MHz

Clock output to 89TTM552

FLQS_TIC_IN

1.5V HSTL Class 1

I

175 MHz

Cell time tic input from 89TTM552

FLQS_TIC_OUT

1.5V HSTL Class 1

O

175 MHz

Cell time tic out to 89TTM552

FLQS_VREF

0.75V

—

HSTL reference. Nominally VDDQ / 2, so connect to 0.75 V

Table 8 89TTM552/89TTM553 Interface

Signal Name

I/O Type

Dir.

Freq.

Remarks

ZBUS_AVALID_N

3.3V LVTTL,

12mA drive,

internal pullup

B

33 or

66 MHz

ZBus address valid flag (active low)

ZBUS_CLK

3.3V,

no internal pullup

I

33 or

66 MHz

ZBus clock input (up to 66 MHz)

ZBUS_AD[15:0]

3.3V LVTTL,

12mA drive,

internal pullup

B

33 or

66 MHz

ZBus 16-bit multiplexed address/data bus

ZBUS_DEVID[4:0]

3.3V,

internal pullup

I

33 or

66 MHz

Used for ZBus device identification

ZBUS_DVALID_N

3.3V LVTTL,

12mA drive,

internal pullup

B

33 or

66 MHz

ZBus data valid flag (active low)

ZBUS_GNT_N

3.3V,

internal pullup

I

33 or

66 MHz

ZBus grant (active low)

ZBUS_INT_N[2:0]

3.3V LVTTL,

12mA drive

O

33 or

66 MHz

ZBus device interrupt (active low)

ZBUS_PRTY

3.3V LVTTL,

12mA drive,

internal pullup

B

33 or

66 MHz

ZBus parity over address/data; one parity bit for 16 bits

ZBUS_DIR

3.3V LVTTL,

12mA drive

O

33 or

66 MHz

ZBus write/read flag

ZBUS_REQ_N

3.3V LVTTL,

12mA drive

O

33 or

66 MHz

ZBus master cycle request (active low)

Table 9 Processor Interface (ZBus)

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