X9521 Datasheet, PDF (2/26 Pages) Xicor Inc. – Dual DCP, EEPROM Memory

X9521 – Preliminary Information
PIN CONFIGURATION
R_H2
R_W2
R_L2
NC
NC
NC
WP
SCL
SDA
V_SS
20 Pin TSSOP
1 20
2 19
3 ₁₈
4 ₁₇
5
16
6
15
7 ₁₄
8 ₁₃
9 12
10 11
NOT TO SCALE
Vcc
NC
A
NC
NC
B
NC
NC
C
NC
D
R_H1
R_W1
E
R_L1
CSP
1
2
3
4
NC V1/Vcc R_W2 R_L2
NC _NC R_{H2 NC}
NC _{NC NC WP}
R_H1 NC _NC SCL
V_SS R_W1 R_{L1 SDA}
Top View – Bumps Down
PIN ASSIGNMENT
Pin
CSP
Name
1
B3
R_H2
2
A3
R_w2
3
A4
R_L2
7
C4
WP
8
D4
SCL
9
E4
10
11
12
13
20
4, 5, 6,
14, 15,
16, 17,
18, 19
E1
E3
E2
D1
A2
A1, B1,
B2, B4,
C1, C2,
C3, D2,
D3
SDA
Vss
R_L1
R_w1
R_H1
Vcc
NC
Function
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.
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.
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
REV 1.1.9 1/30/03
www.xicor.com
Characteristics subject to change without notice. 2 of 26