3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR SY100EPT21L DESCRIPTION FEATURES ■ ■ ■ ■ ■ ■ ■ 3.3V power supply 1.9ns typical propagation delay 275MHz fMAX (Clock bit stream, not pseudo-random) Differential LVPECL inputs 24mA LVTTL outputs Flow-through pinouts Internal input resistors: pulldown on D, pulldown and pullup on /D ■ Q output will default LOW with inputs open or at GND ■ VBB output ■ Available in 8-pin MSOP and SOIC package The SY100EPT21L is a single differential LVPECL-toLVTTL 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 NAMES PIN CONFIGURATION/BLOCK DIAGRAM Pin NC 1 8 VCC LVTTL D 2 7 Q LVPECL D 3 VBB 4 6 NC 5 GND Function Q LVTTL Output D, /D Differential LVPECL Input Pair VCC Positive Supply VBB Output Reference Voltage GND Ground (Available in 8-pin SOIC and 8-pin MSOP) Rev.: A 1 Amendment: /1 Issue Date: July 2000 Micrel SY100EPT21L ABSOLUTE MAXIMUM RATINGS(1) Symbol TRUTH TABLE Value Unit D /D Q –0.5 to +3.8 V L H L 0V to VCC+0.5 V H L H Open Open L Paramter VCC Power Supply Voltage VI PECL Input Voltage VO Voltage Applied to Output at HIGH State –0.5 to VCC V IO Current Applied to Output at LOW State Twice the Rated IOL mA Tstore Storage Temperature –65 to +150 °C TA Operating Temperature –40 to +85 °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. LVTTL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±5% TA = –40°C Symbol TA = 0°C TA = +25°C TA = +85°C 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 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 VOUT = 0V LVPECL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±5% TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit — 150 — 150 — — 150 — 150 µA µA IIH Input HIGH Current IIL Input LOW Current D /D 0.5 –300 — — 0.5 –300 — — 0.5 –300 — — — — 0.5 –300 — — VIH Input HIGH Voltage(2) 100EPT 2135 2420 2135 2420 2135 — 2420 2135 2420 VIL VBB Input LOW Voltage(2) 100EPT 1490 1825 1490 1825 1490 — 1825 1490 1825 Reference Output(2) 100EPT 1920 2040 1920 2040 1920 1980 2040 1920 2040 NOTES: 1. These values are for VCC = 3.3V. Level Specifications will vary 1:1 VCC. 2 Condition Micrel SY100EPT21L AC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±5% TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit Condition tPLH tPHL Propagation Delay 1.5 2.5 1.5 2.5 1.5 1.9 2.5 1.5 2.5 ns CL = 20pF tskpp Part-to-Part Skew(1,2) — 0.5 — 0.5 — — 0.5 — 0.5 ns CL = 20pF CL = 20pF Frequency(3,4) fMAX Maximum Input 275 — 275 — 275 — — 275 — MHz VCMR Common Mode Range 1.2 VCC 1.2 VCC 1.2 — VCC 1.2 VCC V VPP Minimum Peak-to-Peak Input(5) 100 — 100 — 100 — — 100 — mV tr tf Output Rise/Fall Time (1.0V to 2.0V) 0.5 1.0 0.5 1.0 0.5 — 1.0 0.5 1.0 ns NOTES: 1. Part-to-Part Skew considering HIGH-to-HIGH transitions at common VCC level. 2. These parameters are guaranteed but not tested. 3. Frequency at which output levels will meet a 0.8V to 2.0V minimum swing. 4. The fMAX value is specified as the minimum guaranteed maximum frequency. Actual operational maximum frequency may be greater. 5. 100mV input guarantees full logic at output. PRODUCT ORDERING CODE Ordering Code Package Type Operating Range VCC Range (V) SY100EPT21LZC Z8-1 Commercial +3.3V ±5% SY100EPT21LZCTR Z8-1 Commercial +3.3V ±5% SY100EPT21LKC K8-1 Commercial +3.3V ±5% SY100EPT21LKCTR K8-1 Commercial +3.3V ±5% 3 CL = 20pF Micrel SY100EPT21L 8 LEAD PLASTIC SOIC (Z8-1) Rev. 03 4 Micrel SY100EPT21L 8 LEAD MSOP (K8-1) Rev. 01 5 Micrel SY100EPT21L 6 Micrel SY100EPT21L 7 Micrel SY100EPT21L 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 8