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3.3V TRIPLE LVPECL-to-ECL OR LVPECL-to-LVECL TRANSLATOR
FEATURES
s 3.3V power supply s 620ps propagation delay s Fully differential design s Supports low voltage operation s Available in 20-pin SOIC package
SY100EL91L
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 0.01F 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 VEE 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 0.01F 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.
PIN CONFIGURATION/BLOCK DIAGRAM
VCC 1 D0 2 D0 3
20 VCC 19 18
ECL
PECL
Q0 Q0 GND Q1 Q1 GND
ECL
PECL_VBB 4 D1 5 D1 6 PECL_VBB
7
PECL PECL
17 16 15 14 13 12 11
ECL
PIN NAMES
Q2 Q2
D2 8 D2
9
Pin Dn PECL Inputs ECL Outputs Qn PECL_VBB
Function
VEE 10
VCC
PECL Reference Voltage Output
SOIC TOP VIEW
FUNCTION TABLE
Function LVPECL-to-ECL LVPECL-to-LVECL Vcc 3.3V 3.3V VEE -5.0V -3.3V
Rev.: F
Amendment: /2
1
Issue Date: November, 1999
Micrel
SY100EL91L
3.3V LVPECL INPUT DC ELECTRICAL CHARACTERISTICS(1)
TA = -40C Symbol VCC VIH VIL IIH IIL VBB ICC Parameter Power Supply Voltage Input HIGH Input LOW Voltage(2) Voltage(2) Min. 3.0 2.135 1.490 -- 0.5 -600 1.920 -- Typ. -- -- -- -- -- -- -- -- Max. 3.8 Min. 3.0 TA = 0C Typ. -- -- -- -- -- -- -- -- Max. 3.8 Min. 3.0 TA = +25C Typ. 3.3 Max. 3.8 Min. 3.0 TA = +85C Typ. -- -- -- -- -- -- -- -- Max. 3.8 2.420 1.825 150 -- -- 2.040 10 Unit V V V
A
2.420 2.135 1.825 1.490 150 -- -- -- 0.5 -600
2.420 2.135 2.350 2.420 2.135 1.825 1.490 150 -- -- -- 0.5 -600 -- -- -- -- -- 6.0 1.825 1.490 150 -- -- -- 0.5 -600
Input HIGH Current Input LOW Current Dn Dn Output Reference(2) Power Supply Current
A V mA
2.040 1.920 10 --
2.040 1.920 10 --
2.040 1.920 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.
-3.0V to -3.8V.
ECL/LVECL OUTPUT DC ELECTRICAL CHARACTERISTICS(1)
TA = -40C Symbol VEE VOH VOL IEE Parameter Power Supply Voltage
ECL LVECL
TA = 0C Min. -4.2 -3.0 -1025 -- Typ. -- -- -- -- -- Max. -5.5 -3.8 -880 28
TA = +25C Min. -4.2 -3.0 -1025 -- Typ. -- -- -955 22 Max. -5.5 -3.8 -880 28
TA = +85C Min. -4.2 -3.0 -1025 -1810 -- Typ. -- -- -- -- -- Max. -5.5 -3.8 -880 -1620 30 Unit V mV mV mA
Min. -4.2 -3.0 -1085 -1830 --
Typ. -- -- -- -- --
Max. -5.5 -3.8 -880 28
Output HIGH Voltage Output LOW Voltage Power Supply Current
-1555 -1810
-1620 -1810 -1705 -1620
NOTE: 1. Parametric values specified at:
3 volt Power Supply Range
100EL91L Series
-3.0V to -3.8V.
2
Micrel
SY100EL91L
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 = -40C Symbol tPLH tPHL tskew Parameter Propagation Delay D to Q Diff. S.E. Min. 490 440 -- -- -- 150 1.3 1.5 320 Typ. 590 590 40 -- 25 -- -- -- 400 Max. 690 740 100 200 -- --
VCC-0.2 VCC-0.2
TA = 0C Min. 510 460 -- -- -- 150 1.2 1.4 320 Typ. 610 610 40 -- 25 -- -- -- 400 Max. 710 760 100 200 -- --
VCC-0.2 VCC-0.2
TA = +25C Min. 520 470 -- -- -- 150 1.2 1.4 320 Typ. 620 620 40 -- 25 -- -- -- 400 Max. 720 770 100 200 -- --
VCC-0.2 VCC-0.2
TA = +85C Min. 560 510 -- -- -- 150 1.2 1.4 320 Typ. 660 660 40 -- 25 -- -- -- 400 Max. Unit 760 810 100 200 -- --
VCC-0.2 VCC-0.2
ps
Within-Device Skew(1) Output-to-Output Part-to-Part (Diff.) Duty Cycle (Diff.) Minimum Input Swing(2) Common Mode VPP < 500mV VPP > 500mV Output Rise/Fall Times Q (20% to 80%) Range(3)
ps
VPP VCMR
mV V
tr tf
580
580
580
580
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 SY100EL91LZC SY100EL91LZCTR Package Type Z20-1 Z20-1 Operating Range Commercial Commercial
3
Micrel
SY100EL91L
LVPECL-TO-ECL MODE CONFIGURATION
VCC = +3.3V VCC = +3.3V VCC = +3.3V VCC = 0V
125
83 125
R1
R2
R1
D0 2 D0
3
19 18
Q0 Q0
83
R3
R4
R3
125
83
R1
R2
R1
LVPECL DEVICE
R3
VEE = 0V
Single Ended Mode
D1 5 D1 6
16 15 14
Q1 Q1
R2
LVPECL_VBB 4
17
ECL
GND
VEE = -3.3V
R4
VCC = +3.3V
VCC = 0V
R2
VCC 1
20
ECL
VCC
125
LVPECL LVPECL
ECL DEVICE
83
R3
R4
LVPECL_VBB 7
GND Q2 Q2 VCC
0.1F
VEE = 0V
D2 8 D2 9 VEE 10
13 12 11
VEE = -3.3V
Unused VCC = +3.3V Input
VEE = 0V -3.3V VEE = -3.3V
3.3V Configuration
VCC = +3.3V
VCC = +3.3V VCC = +3.3V
125
VCC = 0V
83 125
R1
R2
R1
D0 2 D0
3
19 18
Q0 Q0
R3 83
83
R3
R4
125
R1
R2
R1
LVPECL DEVICE
R3
VEE = 0V
Single Ended Mode
D1 5 D1 6
16 15 14
Q1 Q1
R2
LVPECL_VBB 4
17
ECL
GND
VEE = -5V
R4
VCC = +3.3V
VCC = 0V
R2
VCC 1
20
ECL
VCC
R4
125
LVPECL LVPECL LVPECL
ECL
ECL DEVICE
83
R4
R3
LVPECL_VBB 7
0.1F
GND Q2 Q2 VCC
VEE = 0V
D2 8 D2 9 VEE 10
13 12 11
VEE = -5V
Unused VCC = +3.3V Input
VEE = 0V -5V VEE = -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.
4
R4
LVPECL
ECL
Micrel
SY100EL91L
20 LEAD SOIC .300" WIDE (Z20-1)
Rev. 03
MICREL-SYNERGY
TEL
3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
FAX
+ 1 (408) 980-9191
+ 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. (c) 2000 Micrel Incorporated
5

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