©2015 Integrated Device Technology, Inc.

MAY 2015

DSC 5678/8

1

Functional Block Diagram

– Data input, address, byte enable and control registers

– Self-timedwriteallowsfastcycletime

◆

Separate byte controls for multiplexed bus and bus

matching compatibility

◆

Dual Cycle Deselect (DCD) for Pipelined Output Mode

◆

2.5V (±100mV) power supply for core

◆

LVTTL compatible, selectable 3.3V (±150mV) or 2.5V

(±100mV) power supply for I/Os and control signals on

each port

◆

Includes JTAG functionality

◆

Industrial temperature range (-40°C to +85°C) is

available at 133MHz

◆

Available in a 256-pin Ball Grid Array (BGA)

◆

Green parts available, see ordering information

HIGH-SPEED 2.5V

512K x 36

SYNCHRONOUS

DUAL-PORT STATIC RAM

WITH 3.3V OR 2.5V INTERFACE

IDT70T3539M

Dout0-8_R

Dout9-17_R

Din_R

ADDR_R

R/

1

0

1/0

1a 0a

1b

0b

1c 0c

1d

0d

dc

b

a

,

Counter/

Address

Reg.

dc b a

0/1

0d 1d

0c 1c

0b 1b

0a 1a

B

W

2

R

B

W

1

R

B

W

0

R

Counter/

Address

Reg.

Dout0-8_L

Dout9-17_L

Dout18-26_L

Dout27-35_L

Dout18-26_R

Dout27-35_R

B

W

0

L

B

W

1

L

B

W

2

L

B

W

3

L

Din_L

ADDR_L

5678 drw 01

R/

512K x 36

MEMORY

ARRAY

ab c d

0/1

1d 0d

1c 0c 1b 0b 1a 0a

B

W

3

R

,

JTAG

TCK

TRST

TMS

TDO

TDI

1

0

1/0

0d 1d

0c 1c

0b

1b

0a

1a

ab

c

d

1/0

1/0

INTERRUPT

COLLISION

DETECTION

LOGIC

R/

WL

CE 0 L

CE1L

R/

WR

CE0 R

CE1R

ZZ

CONTR OL

LOGIC

(1)

(1)

Features:

◆

True Dual-Port memory cells which allow simultaneous

access of the same memory location

◆

High-speed data access

– Commercial: 3.6ns (166MHz)/4.2ns (133MHz)(max.)

– Industrial: 4.2ns (133MHz) (max.)

◆

Selectable Pipelined or Flow-Through output mode

◆

Counter enable and repeat features

◆

Dual chip enables allow for depth expansion without

additional logic

◆

Interrupt and Collision Detection Flags

◆

Full synchronous operation on both ports

– 6ns cycle time, 166MHz operation (12Gbps bandwidth)

– Fast 3.6ns clock to data out

– 1.5ns setup to clock and 0.5ns hold on all control, data, and

address inputs @ 166MHz

NOTE:

1. The sleep mode pin shuts off all dynamic inputs, except JTAG inputs, when asserted. All static inputs, i.e., PL/FTx and OPTx and

the sleep mode pins themselves (ZZx) are not affected during sleep mode.