IDT72P51759L6BB8 IDT, Integrated Device Technology Inc, IDT72P51759L6BB8 Datasheet - Page 66

• Manufacturer Part Number: IDT72P51759L6BB8
• Description: IC FLOW CTRL 36BIT 256-BGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT72P51759L6BB8

• Configuration: Dual
• Density: 2.25Mb
• Access Time (max): 3.7ns
• Word Size: 36b
• Sync/async: Synchronous
• Expandable: Yes
• Bus Direction: Uni-Directional
• Package Type: BGA
• Clock Freq (max): 166MHz
• Supply Current: 150mA
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 256
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 72P51759L6BB8

Cycle:
*A* Queue 30 is selected for read operations. It requires 4 clock cycles to switch queues.
*B* Reads are now enabled. A word from the previously selected queue will be read out.
*C* Another word from Present Queue (PQ) is read.
*D* Another word from PQ is read.
*E* Wd is read from Q30 of D1. This happens to be the last word of Q30, therefore OR goes HIGH to indicate that the data on the Qout is not valid (Q30 was read to empty).
*F* The last word of Q30 remains on the Qout bus, OR is HIGH, indicating that this word has been previously read.
*G* The last word of queue 30 remains on the Qout bus.
*H* The last word of queue 30 remains on the Qout bus.
*I* The next word, available from the newly selected queue, Q15 is now read out. This will occur regardless of REN, due to FWFT mode.
*J* A word, is read from Q15.
*K* The OR flag stays LOW to indicate that Q15 has additional words available for reading.
IDT72P51749/72P51759/72P51769 1.8V, MULTI-QUEUE FLOW-CONTROL DEVICES
(128 QUEUES) 36 BIT WIDE CONFIGURATION 1,179,648, 2,359,296, and 4,718,592 bits
RDADD
RADEN
WRADD
WADEN
RCLK
WCLK
Qout
REN
WEN
OR
Word, Wd remains on the output bus. Queue 15 is selected for read operations.
Din
t
AS
t
QS
*A*
Q
30
PQ
t
QH
t
AH
t
t
QS
AS
t
ENS
Q
15
*B*
t
t
AH
QH
PQ
*C*
Figure 51. Output Ready Flag Timing (In FWFT Mode)
PQ
*D*
t
t
AS
QS
PQ
Q
*E*
15
t
QH
t
AH
*F*
66
Q
30
*G*
W
D
Last Word
*H*
t
ENS
t
DS
COMMERCIAL AND INDUSTRIAL
Q
15
*I*
t
t
ENH
DH
TEMPERATURE RANGES
t
REF
FEBRUARY 10, 2009
Q
15
*J*
Q
15
*K*
6714 drw59