VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
3.125Gb/s Integrated Transimpedance
and Limiting Amplifier with Signal Detect
VSC7969
Table 3: Pad Coordinates
Coordinates (µm)
Signal
Name
Pad
Number
Description
X
Y
GND
1
2
3
4
130
130
130
130
250
375
500
625
Negative power supply rail (typically 0V)
BG_VREF
GND
Band Gap voltage reference 1.24V for testpoint, no connect
Negative power supply rail (typically 0V)
SD_TP
Signal Detect test point, DO NOT CONNECT.
Signal Detect threshold adjustment (see Application amd Usage
section)
SD_ADJ
VOUTN
5
6
130
137
750
875
Complementary logic output (logic LOW when photocurrent is
HIGH)
Signal detect output (logic HIGH when photocurrent exceeds
SDA)
SD_OUT
GND
7
8
9
280
405
530
875
875
875
Negative power supply rail (typically 0V)
Complementary logic output (logic LOW when photocurrent is
HIGH)
VOUTN
GND
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
655
780
875
875
875
875
875
750
625
500
375
250
125
125
125
125
125
125
125
Negative power supply rail (typically 0V)
VOUTP
GND
Positive logic output (logic HIGH when photocurrent is HIGH)
Negative power supply rail (typically 0V)
905
IMON
VOUTP
GMD
CSDN
CSDP
GND
1030
1173
1180
1180
1180
1180
1180
1030
905
Photocurrent Monitor
Positive logic output (logic HIGH when photocurrent is HIGH)
Negative power supply rail (typically 0V)
Test point for Signal Detect capacitor. DO NOT CONNECT.
Test point for Signal Detect capacitor. DO NOT CONNECT.
Negative power supply rail (typically 0V)
GND
Negative power supply rail (typically 0V)
GND
Negative power supply rail (typically 0V)
GND
Negative power supply rail (typically 0V)
FILTER
IN
780
Photodetector cathode connection (filtered VCC
)
530
Photodetector anode connection
GND
405
Negative power supply rail (typically 0V)
Positive power supply rail for 3.3V operation
Positive power supply rail for 5V operation
VCCS
VCCD
280
137
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
G52355-0, Rev 2.0
02/09/01
Page 5
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
