PECL-to-TTL TRANSLATOR FEATURES DESCRIPTION The SY10H350 consists of 4 translators with differential inputs and TTL outputs. The 3-state outputs can be disabled by applying a HIGH TTL logic level on the common OE input. The SY10H350 is designed to be used primarily in systems incorporating both ECL and TTL logic operating off a common power supply. The separate VCC power pins are not connected internally and thus isolate the noisy TTL VCC runs from the relatively quiet ECL VCC runs on the printed circuit board. The differential inputs allow the H350 to be used as an inverting or noninverting translator, or a differential line receiver. The H350 can also drive CMOS with the addition of a pullup resistor. Single 5V power supply Propagation delay, 3.5ns typical Fully compatible with Motorola MC10H350 Available in 20-pin PLCC package PIN CONFIGURATION BLOCK DIAGRAM 4 18 3 D3 /D3 NC /D2 12 D2 ■ ■ ■ ■ SY10H350 17 16 15 14 5 Q2 19 7 VCCT 20 9 VCCE 2 Q0 3 13 12 /OE Top View PLCC J20-1 NC 1 8 14 13 Q3 11 NC 10 GND 9 Q1 15 6 7 8 NC /D1 D1 19 5 /D0 18 4 D0 17 VCC (+5 VDC) = Pins 2 and 20; GND = Pin 10 PIN NAMES Pin Function D0 – D3 True PECL Inputs /D0 – /D3 Inverted PECL Inputs Q0 – Q3 TTL Outputs VCCE PECL VCC (5.0V) VCCT TTL VCC (5.0V) GND Ground /OE Output Enable Rev.: A 1 Amendment: /1 Issue Date: December 2000 Micrel SY10H350 ABSOLUTE MAXIMUM RATINGS(1) Symbol TRUTH TABLE Value Unit /EN D /D Q –0.5 to +7.0 V L L H L 0V to VCC+0.5 V L H L H L Open Open L H X X Z Open X X Z Parameter VCC Power Supply Voltage VI PECL Input Voltage VO Voltage Applied to Output at HIGH State –0.5 to +5.5 V IO Current Applied to Output at LOW State Twice the Rated IOL mA Tstore Storage Temperature –65 to +150 °C TA Operating Temperature 0 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. DC ELECTRICAL CHARACTERISTICS VCC = 4.75V to 5.25V TA = 0°C Symbol Parameter TTL ECL TA = +25°C TA = +85°C Min. Max. Min. Typ. Max. Min. Max. Unit Condition — — 20 12 — — 12 12 20 — — — 20 12 mA No output loads 2.7 — V IOH = –3.0mA IOL = 20mA ICC Power Supply Current VOH Output HIGH Voltage 2.7 — 2.7 — — VOL Output LOW Voltage — 0.5 — — 0.5 — 0.5 V IIH IINH Input HIGH Current (Pin 12) Reverse Current Others — — 20 50 — — — — 20 50 — — 20 50 µA µA IIL IINL Input LOW Current (Pin 12) Forward Current Others — — –0.6 50 — — — — –0.6 50 — — –0.6 50 mA µA IOS Output Short Circuit Current –60 –150 –60 — –150 –60 –150 mA VOUT = 0V IOZH Output Disable Current HIGH — 50 — — 50 — 50 µA VOUT = 2.7V IOZL Output Disable Current LOW –50 +50 –50 — +50 –50 +50 µA VOUT = 0.5 VCMR Common Mode Range 2.8 VCC 2.8 — VCC 2.8 VCC V VPP Minimum Peak-to-Peak Input(1) 200 — 200 — — 200 — mV VIH Input HIGH Voltage (Pin 12) 2.0 — 2.0 — — 2.0 — V VIL Input LOW Voltage (Pin 12) — 0.8 — — 0.8 — 0.8 V NOTES: 1. 200mV input guarantees full logic at output. 2. These values are for VCC = 5.0V. Level Specifications will vary 1:1 VCC. 2 Micrel SY10H350 AC ELECTRICAL CHARACTERISTICS VCC = 4.75V to 5.25V TA = 0°C Symbol Parameter TA = +25°C TA = +85°C Min. Max. Min. Typ. Max. Min. Max. Unit Condition tPLH tPHL Propagation Delay D to Output Q 1.5 5.0 1.5 3.5 5.0 1.5 5.0 ns CL = 50pF tpdLZ tpdHZ Output Disable Time(1) 2.0 8.0 2.0 — 8.0 2.0 8.0 ns CL = 50pF tpdZL tpdZH Output Enable Time(1) 2.0 8.0 2.0 — 8.0 2.0 8.0 ns CL = 50pF tr tf Output Rise/Fall Time (1.0V to 2.0V) 0.3 1.6 0.3 0.8 1.6 0.3 1.6 ns CL = 50pF NOTES: 1. Guaranteed, but not tested. SWITCHING WAVEFORMS /OE /OE 1.5V 1.5V 1.5V TPZL 1.5V TPLZ TPZH VOUT TPHZ VOH 1.5V VOL 1.5V VOUT 0.3V 0.3V Figure 1. 3-State Output Low Enable and Disable Times +7.0V Figure 2. 3-State Output High Enable and Disable Times Open 1ns/V (typical) TPZL, TPLZ 1ns/V (typical) +3.0V All Other 90% INPUT +1.5V 50Ω D.U.T 10% 0V tPHL tPLH 50pF 50Ω COMPLEMENT 80% tPHL tPLH 50% 20% TRUE tTLH Includes jig and probe capacitance tTHL Figure 4. Propagation Delay and Transition Times Figure 3. Test Load *Application Note: Pin 12 is an /OE and the 10H350 is disabled when /OE is at VIH or higher. PRODUCT ORDERING CODE Ordering Code 3 Package Type Operating Range VCC Range (V) SY10H350JC J20-1 Commercial +4.75 to +5.25 SY10H350JCTR J20-1 Commercial +4.75 to +5.25 Micrel SY10H350 20 LEAD PLASTIC LEADED CHIP CARRIER (J20-1) Rev. 00 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 4