CY7C421
Document Number: 38-06001 Rev. *K Page 4 of 22
Pin Configurations
Figure 1. 32-pin PLCC/LCC (Top View) Figure 2. 28-pin DIP (Top View) Figure 3. 32-pIn TQFP (Top View)
4 3 2 1 323130
14 15 1617 181920
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
FL/RT
MR
EF
XO/HF
Q
7
D
6
Q
6
D
7
NC
D
2
D
1
D
0
XI
FF
Q
0
Q
1
NC
Q
2
D
D
W
NC
V
D
D
3
8
cc
4
5
Q
Q
GND
NC
R
Q
Q
3
8
4
5
7C421
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
19
20
24
23
22
21
13
14
25
28
27
26
7C421
W
D
8
D
3
D
2
D
1
D
0
XI
FF
Q
0
Q
1
Q
2
GND
V
cc
D
4
FL/RT
MR
EF
XO/HF
Q
7
R
Q
3
Q
8
D
5
D
6
D
7
Q
6
Q
5
Q
4
26
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
9 101112131415
32 3130 29 28 27 25
Q
1
XI
Q
0
D
1
D
0
NC
NC
FF
D
6
D
5
D
4
V
CC
W
D
8
D
3
D
2
D
7
FL/RT
NC
NC
MR
EF
XO/HF
Q
7
Q
2
Q
3
Q
8
GND
R
Q
4
Q
5
Q
6
16
7C421
CY7C421
Document Number: 38-06001 Rev. *K Page 5 of 22
Pin Definitions
Signal Name Description I/O Function
W
Write Signal I Write into the FIFO
R
Read Signal I Read from the FIFO
D
0
–D
8
Input Data I Data into the FIFO
Q
0
–Q
8
Output Data O Data Out from the FIFO
XI
Expansion In I Cascaded: Connected to XO of pervious device
Non-Cascaded: Connected to V
CC
XO Expansion Out O Cascaded: Connected to XI of next device
Non-Cascaded: Connected to V
CC
HF Half Full Flag O Half-full flag: When HF is LOW, half of the FIFO is full.
FF
Full Flag O When FF is LOW, the FIFO is full.
EF
Empty Flag O When EF is LOW, the FIFO is empty.
MR
Master Reset I FIFO Reset
RT
Retransmit I Causes FIFO to retransmit the data
FL
First Load I Width expansion: Connected to V
CC
Depth expansion: when Gnd indicates that part is first to be loaded all others connected to
V
CC
V
CC
Power I Voltage Supply
GND Ground I Ground
CY7C421
Document Number: 38-06001 Rev. *K Page 6 of 22
Maximum Ratings
Exceeding maximum ratings may impair the useful life of the
device. These user guidelines are not tested.
[1]
Storage Temperature ............................... –65 °C to +150 °C
Ambient Temperature
with Power Applied .................................. –55 °C to +125 °C
Supply Voltage to Ground Potential .............–0.5 V to +7.0 V
DC Voltage Applied to Outputs
in High Z State .............................................–0.5 V to +7.0 V
DC Input Voltage .........................................–0.5 V to +7.0 V
Power Dissipation ........................................................ 1.0 W
Output Current, into Outputs (LOW) ........................... 20 mA
Static Discharge Voltage
(per MIL–STD–883, Method 3015) ......................... > 2000 V
Latch Up Current ...................................................> 200 mA
Operating Range
Range Ambient Temperature
[2]
V
CC
Commercial 0 °C to +70 °C 5 V ± 10%
Industrial –40 °C to +85 °C 5 V ± 10%
Electrical Characteristics
Over the Operating Range
Parameter Description Test Conditions
All Speed Grades
Unit
Min Max
V
OH
Output HIGH Voltage V
CC
= Min, I
OH
= –2.0 mA 2.4 V
V
OL
Output LOW Voltage V
CC
= Min, I
OL
= 8.0 mA 0.4 V
V
IH
Input HIGH Voltage Commercial 2.0 V
CC
V
Industrial 2.2 V
CC
V
IL
Input LOW Voltage
[3]
0.8 V
I
IX
Input Leakage Current GND < V
I
< V
CC
–10 +10 μA
I
OZ
Output Leakage Current R > V
IH
, GND < V
O
< V
CC
–10 +10 μA
I
OS
Output Short Circuit Current
[4]
V
CC
= Max, V
OUT
= GND –90 mA
Electrical Characteristics
Over the Operating Range
Parameter Description Test Conditions
-15 -20
Unit
Min Max Min Max
I
CC
Operating Current V
CC
= Max, I
OUT
= 0 mA,
f = f
MAX
Commercial 65 55 mA
Industrial 100 90
I
CC1
Operating Current V
CC
= Max, I
OUT
= 0 mA,
f = 20 MHz
Commercial 35 35 mA
I
SB1
Standby Current All Inputs = V
IH
Min Commercial 10 10 mA
Industrial 15 15
I
SB2
Power Down Current All Inputs > V
CC
0.2 V Commercial 5 5 mA
Industrial 8 8
Notes
1. Single Power Supply: The voltage on any input or I/O pin cannot exceed the power pin during power up.
2. T
A
is the “instant on” case temperature.
3. V
IL(Min)
= –2.0 V for pulse durations of less than 20 ns.
4. For test purposes, not more than one output at a time should be shorted. Short circuit test duration should not exceed 30 seconds.

CY7C421-15AXC

Mfr. #:
Manufacturer:
Cypress Semiconductor
Description:
FIFO 512x9 .300" PARALLEL CASCADEABLE FIFO COM
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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