MICREL SY100EL91L

3.3V TRIPLE LVPECL-to-ECL
OR LVPECL-to-LVECL
TRANSLATOR
FEATURES
DESCRIPTION
The SY100EL91L is a triple LVPECL-to-ECL or
LVPECL-to-LVECL translator.
A VBB output is provided for interfacing with single
ended PECL signals at the input. If a single ended input
is to be used, the VBB output should be connected to the
D input. The active signal would then drive the D input.
When used, the VBB output should be bypassed to ground
via a 0.01µF capacitor. The VBB output is designed to act
as the switching reference for the EL91L under single
ended input switching conditions. As a result this pin can
only source/sink up to 0.5mA of current.
To accomplish the level translation the EL91L requires
three power rails. The VCC supply should be connected
to the positive supply, and the V EE pin should be
connected to the negative power supply. The GND pins
as expected are connected to the system ground plane.
Both VEE and VCC should be bypassed to ground via
0.01µF capacitors.
Under open input conditions, the D input will be biased
at VCC/2 and the D input will be pulled to GND. This
condition will force the Q output to a LOW, ensuring
stability.
■ 3.3V power supply
■ 620ps propagation delay
■ Fully differential design
■ Supports low voltage operation
■ Available in 20-pin SOIC package
PIN CONFIGURATION/BLOCK DIAGRAM
ECL
PECL
VCC 1
20 VCC
Q0
D0 3
18
Q0
17
GND
D1 5
16
Q1
D1 6
15
Q1
7
14
GND
13
Q2
12
Q2
11
VCC
D2
9
VEE 10
ECL
D2 8
PECL
PECL_V BB
ECL
19
PECL
D0 2
PECL_V BB 4
SY100EL91L
PIN NAMES
Pin
Function
Dn
PECL Inputs
Qn
ECL Outputs
PECL_VBB
PECL Reference Voltage Output
SOIC
TOP VIEW
FUNCTION TABLE
Vcc
VEE
LVPECL-to-ECL
Function
3.3V
–5.0V
LVPECL-to-LVECL
3.3V
–3.3V
Rev.: F
1
Amendment: /2
Issue Date: November, 1999
SY100EL91L
Micrel
3.3V LVPECL INPUT DC ELECTRICAL CHARACTERISTICS(1)
TA = –40°C
Symbol
VCC
TA = 0°C
TA = +25°C
TA = +85°C
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Power Supply Voltage
3.8
3.0
—
3.8
3.0
3.3
3.8
3.0
—
3.8
V
3.0
—
Input HIGH
Voltage(2)
2.135
—
2.420 2.135
—
2.420 2.135 2.350 2.420 2.135
—
2.420
V
VIL
Input LOW
Voltage(2)
1.490
—
1.825 1.490
—
1.825 1.490
—
1.825
V
IIH
Input HIGH Current
—
—
150
—
—
150
—
—
150
—
—
150
µA
IIL
Input LOW Current Dn
Dn
0.5
-600
—
—
—
—
0.5
-600
—
—
—
—
0.5
-600
—
—
—
—
0.5
-600
—
—
—
—
µA
VBB
Output Reference(2)
1.920
—
2.040 1.920
—
2.040 1.920
—
2.040 1.920
—
2.040
V
ICC
Power Supply Current
—
—
—
10
mA
VIH
10
—
—
10
NOTES:
1. Parametric values specified at:
3 volt Power Supply Range 100EL91L Series
2. These levels are for VCC = 3.3V. Level specifications will vary 1:1 with VCC.
—
—
1.825 1.490
6.0
10
—
-3.0V to -3.8V.
ECL/LVECL OUTPUT DC ELECTRICAL CHARACTERISTICS(1)
TA = –40°C
Symbol
Parameter
TA = 0°C
TA = +25°C
TA = +85°C
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
-4.2
-3.0
—
—
-5.5
-3.8
-4.2
-3.0
—
—
-5.5
-3.8
-4.2
-3.0
—
—
-5.5
-3.8
-4.2
-3.0
—
—
-5.5
-3.8
V
-1025
-955
VEE
Power Supply
Voltage
VOH
Output HIGH Voltage
-1085
—
-880
-1025
—
-880
-880
-1025
—
-880
mV
VOL
Output LOW Voltage
-1830
—
-1555 -1810
—
-1620 -1810 -1705 -1620
-1810
—
-1620
mV
IEE
Power Supply Current
—
—
—
—
30
mA
ECL
LVECL
NOTE:
1. Parametric values specified at:
28
3 volt Power Supply Range
—
—
28
100EL91L Series
2
—
22
-3.0V to -3.8V.
28
SY100EL91L
Micrel
AC ELECTRICAL CHARACTERISTICS(4)
LVPECL: VCC = +3.0V to +3.8V, ECL: VEE = -4.2V to -5.5V, LVECL: VEE = -3.0V to -3.8V
TA = –40°C
Symbol
Parameter
tPLH
tPHL
Propagation Delay
D to Q
tskew
Within-Device Skew(1)
Output-to-Output
Part-to-Part (Diff.)
Duty Cycle (Diff.)
VPP
VCMR
tr
tf
Diff.
S.E.
Minimum Input Swing(2)
TA = 0°C
TA = +25°C
TA = +85°C
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max. Unit
490
440
590
590
690
740
510
460
610
610
710
760
520
470
620
620
720
770
560
510
660
660
760
810
ps
—
—
—
40
—
25
100
200
—
—
—
—
40
—
25
100
200
—
—
—
—
40
—
25
100
200
—
—
—
—
40
—
25
100
200
—
ps
150
—
—
150
—
—
150
—
—
150
—
—
mV
1.3
1.5
—
—
VCC–0.2
—
—
VCC–0.2
—
—
VCC–0.2
1.2
1.4
—
—
VCC–0.2
VCC–0.2
1.2
1.4
VCC–0.2
VCC–0.2
1.2
1.4
320
400
580
320
400
580
320
400
580
320
400
580
Range(3)
Common Mode
VPP < 500mV
VPP > 500mV
Output Rise/Fall Times Q
(20% to 80%)
V
VCC–0.2
ps
NOTES:
1. Skew is measured between outputs under identical transitions.
2. Minimum input swing for which AC parameters are guaranteed. The device has a DC gain of ~40.
3. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified
range and the peak-to-peak voltage lies between VPP min. and 1V.
4. Parametric values specified at:
3 volt Power Supply Range
100EL91L Series
-3.0V to -3.8V.
PRODUCT ORDERING CODE
Ordering
Code
3
Package
Type
Operating
Range
SY100EL91LZC
Z20-1
Commercial
SY100EL91LZCTR
Z20-1
Commercial
SY100EL91L
Micrel
LVPECL-TO-ECL MODE CONFIGURATION
VCC = +3.3V
VCC = +3.3V
VCC = 0V
Q1
LVPECL_VBB 7
14
GND
13
Q2
D2 9
12
Q2
VEE 10
11
VCC
ECL
0.1µF
R4
83Ω
R3
R2
R4
83Ω
R3
R2
125Ω
R1
R3
ECL
D2 8
Unused
VCC = +3.3V Input
LVPECL
VEE = 0V
R2
15
R4
D1 6
83Ω
Q1
Single
Ended Mode
125Ω
16
D1 5
VEE = 0V
LVPECL
LVPECL
DEVICE
VCC = 0V
R1
GND
R3
17
LVPECL_VBB 4
R2
Q0
3
R4
18
D0
VCC = +3.3V
83Ω
Q0
125Ω
19
D0 2
R1
VCC
ECL
125Ω
20
VCC 1
LVPECL
R1
VCC = +3.3V
VEE = -3.3V
ECL
DEVICE
VEE = -3.3V
VEE = 0V
VEE = -3.3V
-3.3V
3.3V Configuration
VCC = +3.3V
VCC = +3.3V
VCC = 0V
Q1
LVPECL_VBB 7
14
GND
13
Q2
D2 9
12
Q2
VEE 10
11
VCC
ECL
0.1µF
R4
83Ω
R3
R2
R4
R3
83Ω
R2
125Ω
R1
R3
ECL
D2 8
Unused
VCC = +3.3V Input
LVPECL
VEE = 0V
R2
15
R4
D1 6
R1
Q1
Single
Ended Mode
83Ω
16
D1 5
VEE = 0V
LVPECL
LVPECL
DEVICE
VCC = 0V
R3
GND
125Ω
17
LVPECL_VBB 4
R2
Q0
3
R4
18
D0
VCC = +3.3V
83Ω
Q0
125Ω
19
D0 2
R1
VCC
ECL
125Ω
20
VCC 1
LVPECL
R1
VCC = +3.3V
VEE = -5V
ECL
DEVICE
VEE = -5V
VEE = 0V
VEE = -5V
-5V
5.0V Configuration
NOTES:
1. The schematic above demonstrates three different ways that all or any inputs of SY100EL91L can be used. The three modes or operation are: Differential
LVPECL, Single-Ended LVPECL, and/or Open.
2. If D2 an D2 are used in differential mode, then the same scheme of D0 and D0 applies. If used in single-ended mode, then use the same scheme of D1
and D1.
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SY100EL91L
Micrel
20 LEAD SOIC .300" WIDE (Z20-1)
Rev. 03
MICREL-SYNERGY
TEL
3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
+ 1 (408) 980-9191
FAX
+ 1 (408) 914-7878
WEB
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated
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