IDT72V51556L7-5BB8 IDT, Integrated Device Technology Inc, IDT72V51556L7-5BB8 Datasheet - Page 38

IC FLOW CTRL MULTI QUEUE 256-BGA

IDT72V51556L7-5BB8

Manufacturer Part Number
IDT72V51556L7-5BB8
Description
IC FLOW CTRL MULTI QUEUE 256-BGA
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet

Specifications of IDT72V51556L7-5BB8

Configuration
Dual
Density
2Mb
Access Time (max)
4ns
Word Size
36b
Sync/async
Synchronous
Expandable
Yes
Bus Direction
Uni-Directional
Package Type
BGA
Clock Freq (max)
133MHz
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3.15V
Operating Supply Voltage (max)
3.6V
Supply Current
100mA
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
72V51556L7-5BB8
Cycle:
*A* Queue 30 of Device 1 is selected for read operations. The OV is currently being driven by Device 2, a queue within device 2 is selected for reads. Device 2 also has control
*B* Reads are now enabled. A word from the previously selected queue of Device 2 will be read out.
*C* The Qout of Device 1 goes to Low-Impedance and word Wd is read from Q30 of D1. This happens to be the last word of Q30. Device 2 places its Qout outputs into
*D* Queue 15 of device 1 is selected for read operations. The last word of Q30 was read on the previous cycle, therefore OV goes HIGH to indicate that the data on the Qout is
*E* The last word of Q30 remains on the Qout bus, OV is HIGH, indicating that this word has been previously read.
*F* The next word (We-1), available from the newly selected queue, Q15 of device 1 is now read out. This will occur regardless of REN, 2 RCLK cycles after queue selection
*G* The last word, We is read from Q15, this queue is now empty.
*H* The OV flag goes HIGH to indicate that Q15 was read to empty on the previous cycle.
*I* Due to a write operation the OV flag goes LOW and data word W0 is read from Q15. The latency is: t
IDT72V51546/72V51556 3.3V, MULTI-QUEUE FLOW-CONTROL DEVICES
(32 QUEUES) 36 BIT WIDE CONFIGURATION 1,179,648 and 2,359,296 bits
Qout
(Device 1)
OV
(Device 1)
OV
(Device 2)
RDADD
RADEN
WRADD
WADEN
RCLK
WCLK
of Qout bus, its Qout outputs are in Low-Impedance. This diagram only shows the Qout outputs of device 1. (Reads are disabled).
High-Impedance, device 1 has control of the Qout bus. The OV flag of Device 2 goes to High-Impedance and Device 1 takes control of OV. The OV flag of Device 1 goes LOW
to show that Wd of Q30 is valid.
not valid (Q30 was read to empty). Word, Wd remains on the output bus.
due to the FWFT operation. The OV flag now goes LOW to indicate that this word is valid.
REN
WEN
Din
HIGH-Z
t
AS
t
QS
D
*A*
1
Q
30
t
QH
t
AH
t
ENS
*B*
Figure 13. Output Valid Flag Timing (In Expansion Mode)
t
OLZ
t
t
QS
AS
*C*
D
1
Q
t
t
OVLZ
OVHZ
15
t
A
t
t
t
t
AS
QS
QH
AH
D
*D*
1
Q
15
t
D
QH
t
AH
t
1
ROV
Q
30
W
D
38
Last Word
*E*
SKEW1
*F*
t
A
+ 1*RCLK + t
t
ROV
PFT W
D
t
ENS
1
t
DS
Q
*G*
15
e-1
D
ROV
1
W
Q
t
A
0
.
15
t
SKEW1
COMMERCIAL AND INDUSTRIAL
t
t
ENH
DH
D
1
*H*
Q
15
TEMPERATURE RANGES
W
e
t
ROV
Last Word
*I*
t
A
t
ROV
W
5904 drw16
0
D
Q
1
15

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