72V851L15PF8 IDT, 72V851L15PF8 Datasheet - Page 15

• Manufacturer Part Number: 72V851L15PF8
• Description: FIFO
• Manufacturer: IDT

Specifications of 72V851L15PF8

• Part # Aliases: IDT72V851L15PF8

TWO PRIORITY DATA BUFFER
CONFIGURATION
72V841/72V851 can be used to prioritize two different types of data shared
on a system bus. When writing from the bus to the FIFO, control logic sorts
BIDIRECTIONAL CONFIGURATION
72V851 can be used to buffer data flow in two directions. In the example that
IDT72V801/72V8211/72V821/72V831/72V841/72V851 3.3V DUAL CMOS SyncFIFO
DUAL 256 x 9, DUAL 512 x 9, DUAL 1K x 9, DUAL 2K x 9, DUAL 4K x 9, DUAL 8K x 9
The two FIFOs contained in the IDT72V801/72V811/72V821/72V831/
The two FIFOs of the IDT72V801/72V811/72V821/72V831/72V841/
Processor
Processor
RAM
RAM
Address
Address
Control
Control
Clock
Clock
Data
Data
9
9
9
9
Figure 17. Block Diagram of Bidirectional Configuration
Figure 16. Block Diagram of Two Priority Configuration
V
CC
9
V
CC
9
9
9
RCLKB
OEB
WENA2 RENA2
WCLKA
WENA1
DA0-DA8
RAM ARRAY B
RENB1
RENB2
QB0-QB8
RAM ARRAY A
WCLKB
72V801
72V811
72V821
72V831
72V841
72V851
D
WENB1
D
WCLKA
WENA1
WENA2 RENA2
WENB2 RENB2
RAM ARRAY B
RAM ARRAY A
QA0-QA8
A0
B0
IDT
DB0-DB8
V
WENB1
WCLKB
WENB2
RENA1
-D
-D
RCLKA
CC
72V801
72V811
72V821
72V831
72V841
72V851
V
A8
B8
OEA
CC
IDT
15
Q
Q
A0
RCLKB
RCLKA
RENB1
B0
the intermixed data according to type, sending one kind to FIFO A and the other
kind to FIFO B. Then, at the outputs, each data type is transferred to its
appropriate destination. Additional IDT72V801/72V811/72V821/72V831/
72V841/72V851s permit more than two priority levels. Priority buffering is
particularly useful in network applications.
RENA
follows, a processor can write data to a peripheral controller via FIFO A, and,
in turn, the peripheral controller can write the processor via FIFO B.
OEB2
-Q
-Q
OEA
A8
B8
9
9
TM
9
9
Clock
Data
Clock
Data
9
Processing
Processing
Image
Voice
Card
Card
DMA Clock
Control
Address
Data
Peripheral
Control
Controller
Control
Address
Address
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
I/O Data
4093 drw 19
OCTOBER 22, 2008
4093 drw 18
I/O Data
I/O Data