SN65EPT21
www.ti.com
SLLS970 –NOVEMBER 2009
3.3-V Differential PECL/LVDS to TTL Translator
Check for Samples: SN65EPT21
1
FEATURES
PIN ASSIGNMENT(Add pullup on BOTH
inputs)
•
•
•
1 ns Propagation Delay
Fmax > 300MHz
Operating Range: VCC = 3.0 V to 3.6 V with
GND = 0 V
D or DGK PACKAGE
(TOP VIEW)
•
•
•
24-mA TTL Output
+
Built-In Temperature Compensation
VCC
1
2
8
7
NC
+
Drop-In Compatible to the MC10EPT21,
MC100EPT21
LVTTL
Q
D
+
APPLICATIONS
•
•
Data and Clock Transmission Over Backplane
Signaling Level Conversion for Clock or Data
6
5
NC
3
4
D
LVPECL
VBB
GND
DESCRIPTION
The SN65EPT21 is
a differential PECL-to-TTL
translator. It operates on +3.3 V supply and ground
only. The device includes circuitry to maintain inputs
at Vcc/2 when left open.
Table 1. Pin Descriptions
PIN
FUNCTION
The VBB pin is a reference voltage output for the
device. When the device is used in single-ended
mode, the unused input should be tied to VBB. This
reference voltage can also be used to bias the input
when it is ac coupled. When it is used, place a
Q
LVTTL/LVCMOS Output
D, D
VCC
VBB
GND
NC
Differential LVPECL/LVDS/CML Input
Positive Supply
Output Reference Voltage
Ground
0.01μF decoupling capacitor between VCC and VBB
.
Also limit the sink/source current to < 0.5 mA to VBB
Leave VBB open when it is not used.
.
No Connect
EP
(DFN8 only) Thermal exposed pad must be
connected to a sufficient thermal conduit.
Electrically connect to the most negative supply
(GND) or leave unconnected, floating open.
The SN65EPT21 is housed in an industry standard
SOIC-8 package and is also available in an optional
TSSOP-8 package.
ORDERING INFORMATION(1)
PART NUMBER
SN65EPT21D/DR
PART MARKING
PACKAGE
LEAD FINISH
NiPdAu
EPT21
SSSI
SOIC
SN65EPT21DGK/DGKR
MSOP
NiPdAu
(1) Leaded device options are not initially available; contact a sales representative for further details.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.