X9521 XICOR [Xicor Inc.], X9521 Datasheet - Page 2

• Manufacturer Part Number: X9521
• Description: Dual DCP, EEPROM Memory
• Manufacturer: XICOR [Xicor Inc.]

PIN CONFIGURATION
PIN ASSIGNMENT
X9521 – Preliminary Information
REV 1.1.9 1/30/03
4, 5, 6,
14, 15,
16, 17,
18, 19
Pin
10
11
12
13
20
1
2
3
7
8
9
SDA
R
SCL
R
V
R
WP
NC
NC
NC
W2
H2
SS
L2
C1, C2,
C3, D2,
A1, B1,
B2, B4,
CSP
C4
D4
D1
D3
B3
A3
A4
E4
E1
E3
E2
A2
20 Pin TSSOP
10
1
2
3
4
5
6
7
8
9
Name
20
19
18
17
16
15
14
13
12
11
SCL
SDA
R
R
R
R
R
Vss
R
Vcc
WP
NC
H2
w2
w1
H1
L2
L1
Vcc
NC
NC
NC
NC
NC
NC
R
R
R
H1
W1
L1
Connection to end of resistor array for (the 256 Tap) DCP 2.
Connection to terminal equivalent to the “Wiper” of a mechanical potentiometer for DCP 2.
Connection to other end of resistor array for (the 256 Tap) DCP2.
Serial Clock. This is a TTL level compatible input pin used to control the serial bus timing for
data input and output.
Serial Data. SDA is a bidirectional TTL level compatible pin used to transfer data into and
out of the device. The SDA pin input buffer is always active (not gated). This pin requires
an external pull up resistor.
Ground.
Connection to other end of resistor for (the 100 Tap) DCP 1.
Connection to terminal equivalent to the “Wiper” of a mechanical potentiometer for DCP 1
Connection to end of resistor array for (the 100 Tap) DCP 1.
Supply Voltage.
No Connect
Write Protect Control Pin. WP pin is a TTL level compatible input. When held HIGH, Write
Protection is enabled. In the enabled state, this pin prevents all nonvolatile “write” opera-
tions. Also, when the Write Protection is enabled, and the device Block Lock feature is active
(i.e. the Block Lock bits are NOT [0,0]), then no “write” (volatile or nonvolatile) operations
can be performed in the device (including the wiper position of any of the integrated Digitally
Controlled Potentiometers (DCPs). The WP pin uses an internal “pull-down” resistor, thus if
left floating the write protection feature is disabled.
NOT TO SCALE
A
B
C
D
E
www.xicor.com
R
V
NC
NC
NC
SS
H1
Top View – Bumps Down
1
V1/Vcc
R
NC
NC
NC
2
W1
CSP
Function
R
R
R
NC
NC
3
W2
H2
L1
SDA
SCL
R
WP
NC
4
L2
Characteristics subject to change without notice.
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