IDT723631L30PF Integrated Device Technology, Inc., IDT723631L30PF Datasheet

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IDT723631L30PF

Manufacturer Part Number
IDT723631L30PF
Description
CMOS syncFIFO 512 x 36, 1024 x 36, 2048 x 36
Manufacturer
Integrated Device Technology, Inc.
Datasheet
FEATURES:
• Free-running CLKA and CLKB can be asynchronous or
• Clocked FIFO buffering data from Port A to Port B
• Storage capacity:
• Synchronous read retransmit capability
• Mailbox register in each direction
• Programmable Almost-Full and Almost-Empty flags
• Microprocessor interface control logic
• Input-Ready (IR) and Almost-Full (
• Output-Ready (OR) and Almost-Empty (
• Low-power 0.8-micron advanced CMOS technology
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark and SyncFIFO is a trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
1997 Integrated Device Technology, Inc.
coincident (permits simultaneous reading and writing of
data on a single clock edge)
by CLKA
chronized by CLKB
Integrated Device Technology, Inc.
CLKA
W/
MBA
FS
ENA
CSA
A
FS
R
0
1/
MBF2
A
RST
- A
0/
SEN
SD
AF
IR
35
Control
Port-A
Logic
Reset
Logic
36
IDT723631 - 512 x 36
IDT723641 - 1024 x 36
IDT723651 - 2048 x 36
For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391.
10
AF
) flags synchronized
CMOS SyncFIFO
512 x 36, 1024 x 36,
2048 x 36
AE
) flags syn-
Pointer
Write
Status Flag
Flag Offset
Registers
1024 x 36
2048 x 36
Register
Register
512 x 36
Mail 2
Mail 1
SRAM
Logic
Pointer
Read
• Supports clock frequencies up to 67 MHz
• Fast access times of 11 ns
• Available in 132-pin plastic quad flat package (PQF) or
• Industrial temperature range (-40 C to +85 C) is avail-
DESCRIPTION:
speed, low-power, CMOS clocked FIFO memory. It supports
clock frequencies up to 67 MHz and has read access times as
fast as 12ns. The 512/1024/2048 x 36 dual-port SRAM FIFO
buffers data from port A to Port B. The FIFO memory has
retransmit capability, which allows previously read data to be
accessed again. The FIFO has flags to indicate empty and full
conditions and two programmable flags (almost full and al-
most empty) to indicate when a selected number of words is
space-saving 120-pin thin quad flat package (TQFP)
able, tested to military electrical specifications
The IDT723631/723641/723651 is a monolithic high-
Control
Port-B
Logic
B
MBF1
RTM
RFM
OR
AE
0
- B
35
IDT723631
IDT723641
IDT723651
CLKB
CSB
W
ENB
MBB
/RB
MAY 1997
3023 drw 01
DSC-3023/3
1

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IDT723631L30PF Summary of contents

Page 1

... SEN FS 1/ MBF2 The IDT logo is a registered trademark and SyncFIFO is a trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE 1997 Integrated Device Technology, Inc. For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391. CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 • ...

Page 2

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 DESCRIPTION (CONTINUED) stored in memory. Communication between each port may take place with two 36-bit mailbox registers. Each mailbox register has a flag to signal when new mail ...

Page 3

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 PIN CONFIGURATION (CONTINUED GND ...

Page 4

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 PIN DESCRIPTION Symbol Name A0-A35 Port-A Data AE Almost-Empty Flag AF Almost-Full Flag. B0-B35 Port-B Data. CLKA Port-A Clock CLKB Port-B Clock CSA Port-A Chip Select CSB Port-B ...

Page 5

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 PIN DESCRIPTION (CONTINUED) Symbol Name MBF2 Mail2 Register Flag OR Output-Ready Flag RFM Read From Mark RST Reset RTM Retransmit Mode Port-A Write/Read Select W ...

Page 6

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE (UNLESS OTHERWISE NOTED) Symbol V Supply Voltage Range CC (2) V Input Voltage Range I V (2) Output Voltage Range ...

Page 7

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 ELECTRICAL CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE AND OPERATING FREE-AIR TEMPERATURE Symbol Parameter f Clock Frequency, CLKA or CLKB S t Clock Cycle Time, CLKA or ...

Page 8

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 ELECTRICAL CHARACTERISTICS Symbol Parameter f Clock Frequency, CLKA or CLKB S t Access Time, CLKB to B0-B35 A t Propagation Delay Time, CLKA to IR PIR t ...

Page 9

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 SIGNAL DESCRIPTION RESET The IDT723631/723641/723651 is reset by taking the RST reset ( ) input LOW for at least four port-A clock (CLKA) and four port-B (CLKB) LOW-to-HIGH ...

Page 10

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 impedance control of the data outputs port enable is LOW during a clock cycle, the port chip select and write/read select may change states during the ...

Page 11

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 ready flag is HIGH, a memory location is free in the SRAM to write new data. No memory locations are free when the input- ready flag is LOW ...

Page 12

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 SYNCHRONOUS RETRANSMIT The synchronous retransmit feature of the IDT723631/ 723641/723651 allows FIFO data to be read repeatedly starting at a user-selected position. The FIFO is first put into ...

Page 13

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 CLKA CLKB t RSTS RST FS1,FS0 RSF AE t RSF AF t RSF MBF1 , MBF2 Figure 1. FIFO Reset Loading X and Y with ...

Page 14

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 CLKA 4 RST IR t FSS SEN FS1/ t FSH t FSS FS0/SD NOTE not necessary to program offset register bits on consecutive clock cycles. ...

Page 15

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 CLKA CSA LOW HIGH t t ENS2 ENH2 MBA t t ENS1 ENH1 ENA HIGH A35 W1 t ...

Page 16

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 CLK t t CLKH CLKL CLKB CSB LOW W /RB HIGH MBB LOW t ENS1 ENB HIGH OR B0 -B35 Previous Word in FIFO Output Register CLKA ...

Page 17

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 CLKA t t ENH1 ENS1 ENA t PAF AF (2) [Depth -(Y+1)] Words in FIFO CLKB ENB NOTES: 1. tSKEW2 is the minimum time between a rising CLKA ...

Page 18

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 CLKA IR FIFO Filled to First Restransmit Word CLKB t RMS RTM NOTE: 1. tSKEW1 is the minimum time between a rising CLKB edge and a rising CLKA ...

Page 19

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 CLKA t ENS2 CSA MBA ENA A0 - A35 CLKB MBF1 CSB W /RB MBB ENB B35 FIFO Output Register t ...

Page 20

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 CLKB t ENS2 CSB W /RB MBB ENB B0 - B35 CLKA MBF2 CSA MBA ENA A35 t ENH2 t DH ...

Page 21

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 250 f = 1/2 f data 0pF L 200 150 100 CALCULATING POWER DISSIPATION The I (f) ...

Page 22

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 PARAMETER MEASUREMENT INFORMATION From Output Timing 1.5 V Input t S Data, 1.5 V Enable Input VOLTAGE WAVEFORMS SETUP AND HOLD TIMES Output Enable 1 PLZ ...

Page 23

IDT723631/723641/723651 CMOS SyncFIFO 512 x 36, 1024 x 36, 2048 x 36 ORDERING INFORMATION IDT XXXXXX X Device Type Power Speed Package Process/ Temperature Range COMMERCIAL TEMPERATURE RANGE BLANK Commercial ( + Thin ...

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