X9525 Datasheet, PDF (2/26 Pages) Intersil Corporation – Fiber Channel/Gigabit Etherner Laser Diode Control for Fiber Optic Modules

X9525
PIN CONFIGURATION
R_H2
R_W2
R_L2
NC
NC
A₀
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
V_CC
NC
A
NC
NC
B
NC
NC
C
NC
D
R_H1
R_W1
E
R_L1
CSP
1
2
3
4
NC
V_CC R_W2 R_L2
NC NC ^RH2 NC
NC NC NC WP
R_{H1 NC A0 SCL}
V_SS R_W1 R_{L1 SDA}
Top View – Bumps Down
PIN ASSIGNMENT
Pin
CSP
1
B3
2
A3
3
A4
6
D3
7
C4
8
D4
9
E4
10
11
12
13
20
4, 5, 14,
15, 16, 17,
18, 19
E1
E3
E2
D1
A2
A1, B1,
B2, B4,
C1, C2,
C3, D2
Name
R_H2
R_w2
R_L2
A₀
WP
SCL
SDA
Vss
R_L1
R_W1
R_H1
V_CC
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) DCP 2.
Physical Device Address input. A match in the slave address serial data stream, and the
Physical Device Address input pin must be in order to initiate communication with the X9525.
A maximum of two (2) devices may occupy the same 2-wire serial bus.
Write Protect Control Pin. WP pin is a TTL level compatible input. When held HIGH, Write Pro-
tection is enabled. In the enabled state, this pin prevents all nonvolatile “write” operations. Al-
so, 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 per-
formed in the device (including the wiper position of any of the integrated Digitally Controlled
Potentiometers (DCPs). The WP pin uses an internal “pull-up” resistor, thus if left floating the
write protection feature is enabled.
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
2
FN8210.0
March 10, 2005