CY7C433-15JXCT Cypress Semiconductor Corp, CY7C433-15JXCT Datasheet - Page 12
![IC ASYNC FIFO MEM 4KX9 32-PLCC](/photos/6/51/65138/428-32-plcc_sml.jpg)
CY7C433-15JXCT
Manufacturer Part Number
CY7C433-15JXCT
Description
IC ASYNC FIFO MEM 4KX9 32-PLCC
Manufacturer
Cypress Semiconductor Corp
Series
CY7Cr
Datasheet
1.CY7C421-20JXC.pdf
(17 pages)
Specifications of CY7C433-15JXCT
Function
Asynchronous
Memory Size
36K (4K x 9)
Data Rate
50MHz
Access Time
10ns
Voltage - Supply
3.3V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CY7C433-15JXCT
Manufacturer:
Cypress Semiconductor Corp
Quantity:
10 000
into the FIFO, with a signal that is asynchronous to the read
signal. The (internal) state machine in the FIFO goes from empty
to empty+1. However, it does this asynchronously with respect
to the read signal, so that the effective pulse width of the read
signal cannot be determined, because the state machine does
not look at the read signal until it goes to the empty+1 state.
Document #: 38-06001 Rev. *C
FULL
W
D
MR
9
Figure 13. Depth Expansion
9
9
9
FF
FF
FF
CY7C420/1
CY7C424/5
CY7C428/9
CY7C432/3
CY7C420/1
CY7C424/5
CY7C428/9
CY7C432/3
CY7C420/1
CY7C424/5
CY7C428/9
CY7C432/3
CY7C419
CY7C419
CY7C419
XO
XO
XO
XI
XI
XI
Similarly, the minimum write pulse width may be violated by
trying to write into a full FIFO, and asynchronously performing a
read. The empty and full flags are used to avoid these effective
pulse width violations, but to do this and operate at the maximum
frequency, the flag must be valid at the beginning of the next
cycle.
*
* FIRST DEVICE
EF
EF
EF
FL
FL
FL
CY7C419/21/25/29/33
9
Page 12 of 17
Q
EMPTY
R
V
CC
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