7C1021B-12 데이터 시트보기 (PDF) - Cypress Semiconductor
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7C1021B-12 Datasheet PDF : 10 Pages
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CY7C1021B
Selection Guide
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum CMOS Standby Current (mA)
Pin Configurations
Com’l/Ind’l
Automotive
Com’l/Ind’l
Automotive
L Version
-12
-15
12
15
140
130
130
10
10
15
0.5
0.5
SOJ/TSOP II
Top View
A4 1
A3 2
A2 3
A1 4
A0 5
CE 6
I/O1 7
I/O2 8
I/O3 9
I/O4 10
VCC 11
VSS 12
I/O5 13
I/O6 14
I/O7 15
I/O8 16
WE 17
A15 18
A14 19
A13 20
A12 21
NC 22
44 A5
43 A6
42 A7
41 OE
40 BHE
39 BLE
38 I/O16
37 I/O15
36 I/O14
35 I/O13
34 VSS
33 VCC
32 I/O12
31 I/O11
30 I/O10
29 I/O9
28 NC
27 A8
26 A9
25 A10
24 A11
23 NC
Pin Definitions
Pin Name
A0–A15
I/O1–I/O16
NC
WE
CE
BHE, BLE
OE
VSS
VCC
SOJ, TSOP–Pin Number I/O Type
Description
1–5,18–21, 24–27, 42–44
Input
Address Inputs used to select one of the address locations.
7–10, 13–16, 29–32, Input/Output Bidirectional Data I/O lines. Used as input or output lines depending
35–38
on operation.
22, 23, 28
No Connect No Connects. Not connected to the die.
17
Input/Control Write Enable Input, active LOW. When selected LOW, a Write is
conducted. When deselected HIGH, a Read is conducted.
6
Input/Control Chip Enable Input, active LOW. When LOW, selects the chip. When
HIGH, deselects the chip.
40, 39
41
Input/Control Byte Write Select Inputs, active LOW. BHE controls I/O16–I/O9,
BLE controls I/O8–I/O1.
Input/Control Output Enable, active LOW. Controls the direction of the I/O pins.
When LOW, the I/O pins are allowed to behave as outputs. When
deasserted HIGH, I/O pins are tri-stated, and act as input data pins.
12, 34
Ground Ground for the device. Should be connected to ground of the
system.
11, 33
Power Supply Power Supply inputs to the device.
Document #: 38-05145 Rev. *C
Page 2 of 10
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