SY100EPT21L 반도체 회로 부품 판매점
3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR
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 Micrel Semiconductor |
3.3V DIFFERENTIAL
LVPECL-to-LVTTL
TRANSLATOR
SY100EPT21L
FEATURES
DESCRIPTION
s 3.3V power supply
s 1.9ns typical propagation delay
s 275MHz fMAX (Clock bit stream, not pseudo-random)
s Differential LVPECL inputs
s 24mA LVTTL outputs
s Flow-through pinouts
s Internal input resistors: pulldown on D, pulldown
and pullup on /D
s Q output will default LOW with inputs open or at
GND
s VBB output
s Available in 8-pin MSOP and SOIC package
The SY100EPT21L is a single differential LVPECL-to-
LVTTL translator using a single +3.3V power supply.
Because LVPECL (Low Voltage Positive ECL) levels are
used, only +3.3V and ground are required. The small
outline 8-lead SOIC package and low skew single gate
design make the EPT21L ideal for applications that
require the translation of a clock or data signal where
minimal space, low power, and low cost are critical.
VBB allows a differential, single-ended, or AC-coupled
interface to the device. If used, the VBB output should be
bypassed to VCC with 0.01µF capacitor.
Under open input conditions, the /D will be biased at a
VCC/2 voltage level and the D input will be pulled to
ground. This condition will force the Q output low to
provide added stability.
The 100EPT is compatible with positive ECL 100K
logic levels.
PIN CONFIGURATION/BLOCK DIAGRAM
NC 1
D2
LVPECL
D3
8 VCC
LVTTL 7 Q
6 NC
VBB 4
5 GND
(Available in 8-pin SOIC and 8-pin MSOP)
PIN NAMES
Pin
Q
D, /D
VCC
VBB
GND
Function
LVTTL Output
Differential LVPECL Input Pair
Positive Supply
Output Reference Voltage
Ground
Rev.: A Amendment: /1
1 Issue Date: July 2000
Micrel
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Paramter
Value
Unit
VCC Power Supply Voltage
–0.5 to +3.8
V
VI PECL Input Voltage 0V to VCC+0.5 V
VO Voltage Applied to
Output at HIGH State
–0.5 to VCC
V
IO
Tstore
TA
Current Applied to
Output at LOW State
Storage Temperature
Operating Temperature
Twice the
Rated IOL
–65 to +150
–40 to +85
mA
°C
°C
NOTE:
1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS
are exceeded. This is a stress rating only and functional operation is not
implied at conditions other than those detailed in the operational sections
of this data sheet. Exposure to ABSOLUTE MAXIMUM RATlNG conditions
for extended periods may affect device reliability.
TRUTH TABLE
D
L
H
Open
/D
H
L
Open
SY100EPT21L
Q
L
H
L
LVTTL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±5%
TA = –40°C TA = 0°C
TA = +25°C
TA = +85°C
Symbol
Parameter
Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit Condition
IOS Output Short Circuit Current –80 –275 –80 –275 –80 — –275 –80 –275 mA VOUT = 0V
ICC Power Supply Current
— 20 — 20 — 14 20 — 20 mA
VOH Output HIGH Voltage
2.0 — 2.0 — 2.0 — — 2.0 — V IOH = –3.0mA
VOL Output LOW Voltage
— 0.5 — 0.5 — — 0.5 — 0.5 V IOL = 24mA
LVPECL DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±5%
TA = –40°C TA = 0°C
Symbol
Parameter
Min. Max. Min. Max.
IIH Input HIGH Current
— 150 — 150
IIL Input LOW Current
D 0.5 — 0.5 —
/D –300 — –300 —
VIH Input HIGH Voltage(2) 100EPT 2135 2420 2135 2420
VIL Input LOW Voltage(2) 100EPT 1490 1825 1490 1825
VBB Reference Output(2) 100EPT 1920 2040 1920 2040
NOTES:
1. These values are for VCC = 3.3V. Level Specifications will vary 1:1 VCC.
TA = +25°C
Min. Typ. Max.
— — 150
0.5 —
–300 —
—
—
2135 — 2420
1490 — 1825
1920 1980 2040
TA = +85°C
Min. Max.
— 150
0.5 —
–300 —
2135 2420
1490 1825
1920 2040
Unit
µA
µA
Condition
2
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SY100EPT21L translator
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