SY10ELT28 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – 5V TTL-TO-DIFFERENTIAL PECL AND DIFFERENTIAL PECL-TO-TTL TRANSLATOR

5V TTL-TO-DIFFERENTIAL PECL
AND DIFFERENTIAL PECL-TO-TTL
TRANSLATOR
SY10ELT28
SY100ELT28
FINAL
FEATURES
s Guaranteed AC parameters over temperature:
• f_MAX > 160MHz (TTL)
• < 5.5ns PECL-to-TTL propagation delay
• < 1.5ns t_r / t_f; PECL output
• < 1.3ns TTL-to-PECL propagation delay
s Wide temperature range: –40°C to +85°C
s 5V power supply
s Q_TTL output will default low with inputs left open
or < 1.3V
s Q_ECL output will default high with inputs left open
s Internal PECL input pulldown resistors
s Available in 8-pin MSOP and SOIC packages
DESCRIPTION
The SY10/100ELT28 is a differential PECL-to-TTL
translator and a TTL-to-differential PECL translator in a
single package. Because PECL (Positive ECL) levels are
used, only +5V and ground are required. The small outline
8-pin package and the dual translation design of the
ELT28 makes it ideal for applications which are sending
and receiving signals across a backplane.
PIN CONFIGURATION/BLOCK DIAGRAM
DECL 1
/DECL 2
PECL
QECL 3
/QECL 4
8 VCC
7 QTTL
TTL
6 DTTL
5 GND
TOP VIEW
(Available in MSOP or SOIC package)
PIN NAMES
Pin
DTTL
QTTL
DECL, /DECL
QECL, /QECL
V_CC
GND
Function
TTL Inputs
TTL Outputs
PECL Differential Inputs
PECL Differential Outputs
Positive Supply
Ground
Rev.: B Amendment: /0
1
Issue Date: February 2003