CY7C421(2002) 查看數據表（PDF） - Cypress Semiconductor
零件编号
产品描述 (功能)
生产厂家
CY7C421 Datasheet PDF : 22 Pages
| |||
CY7C419/21/25/29/33
Logic Block Diagram
DATA INPUTS
(D0–D 8)
W
WRITE
CONTROL
RAM ARRAY
256 x 9
512 x 9
WRITE
1024x 9
POINTER
2048x 9
4096x 9
R
READ
CONTROL
THREE-
STATE
BUFFERS
DATA OUTPUTS
(Q0–Q 8)
READ
POINTER
RESET
LOGIC
Pin Configurations
PLCC/LCC
Top View
DIP
Top View
MR
FL/RT
D2
4 3 2 1 323130
5
29
D6
D1 6
D0 7
28 D7
27 NC
XI 8
FF 9
Q0 10
7C419
7C421/5/9
7C433
26 FL/RT
25 MR
24 EF
Q1 11
NC 12
23 XO/HF
22 Q7
Q2
13
21
14 15 1617 181920
Q6
C420–2
TQFP
Top View
W
D8
D3
D2
D1
D0
XI
FF
Q0
Q1
Q2
Q3
Q8
GND
1
28
2
27
3
26
4
25
5
6
7C419
7C420/1
24
23
7 7C424/5 22
8 7C428/9 21
9 7C432/3 20
10
19
11
18
12
17
13
16
14
15
Vcc
D4
D5
D6
D7
FL/RT
MR
EF
XO/HF
Q7
Q6
Q5
Q4
R
C420–3
FLAG
LOGIC
EF
FF
EXPANSION
XI
LOGIC
XO/HF
C420–1
32 3130 29 28 27 26 25
D1
1
24
D0
2
23
NC
3
22
NC
XI
4
7C419
7C421/5/9
21
5
7C433
20
FF
6
19
Q0
7
18
Q1
8
17
9 10 11 12 13 14 15 16
D7
FL/RT
NC
NC
MR
EF
XO/HF
Q7
C420–4
Selection Guide
256 x 9
7C419–10 7C419–15
7C419–30 7C419–40
512 x 9 (600-mil only)
7C420–20 7C420–25
7C420–40 7C420–65
512 x 9
7C421–10 7C421–15 7C421–20 7C421–25 7C421–30 7C421–40 7C421–65
1K x 9 (600-mil only)
7C424–20 7C424–25 7C424–30 7C424–40 7C424–65
1K x 9
7C425–10 7C425–15 7C425–20 7C425–25 7C425–30 7C425–40 7C425–65
2K x 9 (600-mil only)
7C428–20
7C428–65
2K x 9
4K x 9 (600-mil only)
7C429–10 7C429–15 7C429–20 7C429–25 7C429–30 7C429–40 7C429–65
7C432–25
7C432–40
4K x 9
7C433–10 7C433–15 7C433–20 7C433–25 7C433–30 7C433–40 7C433–65
Frequency (MHz)
50
40
33.3
28.5
25
20
12.5
Maximum Access Time (ns)
10
15
20
25
30
40
65
ICC1 (mA)
35
35
35
35
35
35
35
Maximum Rating [1]
DC Voltage Applied to Outputs
in High Z State................................................–0.5V to +7.0V
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
DC Input Voltage ............................................–0.5V to +7.0V
Power Dissipation.......................................................... 1.0W
Storage Temperature .................................–65°C to +150°C Output Current, into Outputs (LOW)............................ 20 mA
Ambient Temperature with
Power Applied.............................................–55°C to +125°C
Static Discharge Voltage ........................................... >2000V
(per MIL–STD–883, Method 3015)
Supply Voltage to Ground Potential ............... –0.5V to +7.0V Latch-Up Current..................................................... >200 mA
Note:
1. Single Power Supply: The voltage on any input or I/O pin can not exceed the power pin during power-up.
Document #: 38-06001 Rev. *A
Page 2 of 22
Share Link: 