
AZ88923
High-Speed Limiting Post Amplifier
1630 S. STAPLEY DR., SUITE 127
MESA, ARIZONA 85204
USA
(480) 962-5881
FAX (480) 890-2541
www.azmicrotek.com
ARIZONA MICROTEK, INC.
FEATURES
Up to 2.5Gbps operation
Differential PECL Inputs
Differential PECL Outputs
Open Drain TTL/CMOS LOS Output
TTL/CMOS Enable Input
High-Speed SiGe Process
DESCRIPTION
The AZ88923 is a limiting post amplifier usable at data rates up to 2.5Gbps. It is ideal for use as a post
amplifier following a transimpedance amplifier.
The AZ88923 contains a programmable loss of signal detect function to determine when the input signal has
been lost. This information can be used with the /EN input pin to disable the output under LOS conditions. The
detect threshold can be set with a resistor divider between V
CC
and V
REF
. The LOS output is an open drain
compatible with CMOS and TTL.
The outputs produce standard PECL 100K voltage compensated levels.
V
REF
BLOCK DIAGRAM
D
IN
/D
IN
D
OUT
/D
OUT
/EN
LOS
LOS
LVL
V
REF
PACKAGE AVAILABILITY
PART NUMBER
PACKAGE
MARKING
AZ88
923
NOTES
TSSOP 10
AZ88923U
1,2,3
1
Add R1 at end of part number for 7 inch (1K parts), R2 for 13 inch (2.5K
parts) Tape & Reel.
Date code format: “Y” or “YY” for year followed by “WW” for week.
Parts marked JNB for date codes prior to 4WW (prior to 2004).
Date code “YWW” or “YYWW” on underside of part.
2
3
4
/EN
D
IN
/D
IN
LOS
LVL
V
CC
D
OUT
/D
OUT
GND
1
3
2
4
5
TSSOP-10
10
8
9
7
6
LOS
PINOUT ASSIGNMENT
PIN DESCRIPTION
PIN
FUNCTION
Differential Inputs
PECL Outputs
Output Enable
LOS Threshold
LOS Output
Reference Voltage Output
Positive Voltage
Ground
D
IN
, /D
IN
D
OUT
, /D
OUT
/EN
LOS
LVL
LOS
V
REF
V
CC
GND