70V28L20PFI IDT, Integrated Device Technology Inc, 70V28L20PFI Datasheet

70V28L20PFI

Manufacturer Part Number
70V28L20PFI
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet

Specifications of 70V28L20PFI

Density
1Mb
Access Time (max)
20ns
Sync/async
Asynchronous
Architecture
Not Required
Clock Freq (max)
Not RequiredMHz
Operating Supply Voltage (typ)
3.3V
Address Bus
16b
Package Type
TQFP
Operating Temp Range
-40C to 85C
Number Of Ports
2
Supply Current
220mA
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
3.6V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
100
Word Size
16b
Number Of Words
64K
Lead Free Status / Rohs Status
Not Compliant
©2008 Integrated Device Technology, Inc.
Features
Functional Block Diagram
NOTES:
1. BUSY is an input as a Slave (M/S=V
2. BUSY and INT are non-tri-state totem-pole outputs (push-pull).
True Dual-Ported memory cells which allow simultaneous
access of the same memory location
High-speed access
– Commercial: 15/20ns (max.)
– Industrial: 20ns (max.)
Low-power operation
– IDT70V28L
Dual chip enables allow for depth expansion without
external logic
IDT70V28 easily expands data bus width to 32 bits or
more using the Master/Slave select when cascading more
than one device
I/O
Active: 440mW (typ.)
Standby: 660µW (typ.)
BUSY
I/O
SEM
R/
CE
CE
8-15L
INT
A
OE
UB
LB
0-7L
A
15L
W
0L
0L
1L
L
L
L
L
L
L
L
(1,2)
(2)
IL
Decoder
Address
) and an output when it is a Master (M/S=V
R/W
CE
CE
OE
0L
1L
L
L
16
Control
I/O
HIGH-SPEED 3.3V
64K x 16 DUAL-PORT
STATIC RAM
ARBITRATION
SEMAPHORE
INTERRUPT
MEMORY
ARRAY
64Kx16
70V28
LOGIC
M/S
IH
1
).
(1)
M/S = V
M/S = V
Busy and Interrupt Flags
On-chip port arbitration logic
Full on-chip hardware support of semaphore signaling
between ports
Fully asynchronous operation from either port
Separate upper-byte and lower-byte controls for multi-
plexed bus and bus matching compatibility
LVTTL-compatible, single 3.3V (±0.3V) power supply
Available in a 100-pin TQFP
Industrial temperature range (–40°C to +85°C) is available
for selected speeds
Green parts available, see ordering information
Control
I/O
IL
IH
for BUSY input on Slave
for BUSY output flag on Master,
16
Decoder
Address
CE
CE
OE
R/W
0R
1R
R
R
OCTOBER 2008
4849 drw 01
IDT70V28L
R/
UB
CE
CE
OE
LB
BUSY
A
A
SEM
INT
I/O
I/O
15R
0R
W
R
R
0R
1R
R
R
R
8-15R
0-7R
R
(2)
DSC-4849/5
R
(1,2)

Related parts for 70V28L20PFI

70V28L20PFI Summary of contents

Page 1

Features True Dual-Ported memory cells which allow simultaneous access of the same memory location High-speed access – Commercial: 15/20ns (max.) – Industrial: 20ns (max.) Low-power operation – IDT70V28L Active: 440mW (typ.) Standby: 660µW (typ.) Dual chip enables allow for depth ...

Page 2

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Description The IDT70V28 is a high-speed 64K x 16 Dual-Port Static RAM. The IDT70V28 is designed to be used as a stand-alone 1024K-bit Dual-Port RAM combination MASTER/SLAVE Dual-Port ...

Page 3

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Pin Names Left Port Right Port Chip Enables R/W R/W Read/Write Enable Output Enable ...

Page 4

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Truth Table I – Chip Enable < 0. >V -0.2V CC (3) X NOTES: 1. Chip Enable references are shown above ...

Page 5

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM DC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range Symbol Parameter ( Input Leakage Current Output Leakage Current LO V Output Low Voltage OL ...

Page 6

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM AC Test Conditions Input Pulse Levels Input Rise/Fall Times Input Timing Reference Levels Output Reference Levels Output Load Waveform of Read Cycles ADDR ( UB, LB R/W DATA OUT ...

Page 7

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM AC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range Symbol READ CYCLE t Read Cycle Time RC t Address Access Time AA (3) t Chip Enable Access Time ACE ...

Page 8

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Timing Waveform of Write Cycle No. 1, R/W Controlled Timing ADDRESS OE (9,10 SEM ( ( R/W DATA OUT DATA IN Timing Waveform of ...

Page 9

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Timing Waveform of Semaphore Read after Write Timing, Either Side VALID ADDRESS t AW SEM I R/W OE NOTES ...

Page 10

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM AC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range Symbol BUSY TIMING (M/S BUSY Access Time from Address Match t BAA BUSY Disable Time from Address Not ...

Page 11

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Timing Waveform of Write with Port-to-Port Read and BUSY (M ADDR "A" R/W "A" DATA IN "A" (1) t APS ADDR "B" BUSY "B" DATA OUT "B" NOTES: 1. ...

Page 12

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Waveform of BUSY Arbitration Controlled by CE Timing (M ADDR "A" and "B" CE "A" (2) t APS CE "B" BUSY "B" Waveform of BUSY Arbitration Cycle Controlled by ...

Page 13

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Waveform of Interrupt Timing ADDR "A" CE "A" R/W "A" INT "B" ADDR "B" CE "B" OE "B" INT "B" NOTES: 1. All timing is the same for left and right ...

Page 14

... FFFF. The R message (16 bits) at FFFE or FFFF is user-defined since addressable SRAM location. If the interrupt function is not used, address locations FFFE and FFFF are not used as mail boxes, but as part of the random access memory. Refer to Truth Table IV for the interrupt operation ...

Page 15

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Busy Logic Busy Logic provides a hardware indication that both ports of the RAM have accessed the same location at the same time. It also allows one of the two accesses ...

Page 16

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM verifies its success in setting the latch by reading it was successful, it proceeds to assume control over the shared resource was not successful in setting the ...

Page 17

IDT70V28L High-Speed 3.3V 64K x 16 Dual-Port Static RAM Ordering Information XXXXX A 999 Device Power Speed Package Type NOTE: 1. Contact your sales office for Industrial Temperature range in other speeds, packages and powers. 2. Green parts available. For ...

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