QUAD TTL/NMOS-to-PECL TRANSLATOR FEATURES DESCRIPTION The SY10H351 is a quad translator for interfacing data between a saturated logic selection and the PECL section of digital systems when only a +5.0V VDC power supply is available. The SY10H351 has TTL/NMOS compatible inputs and PECL complementary open-emitter outputs that allow use as an inverting/non-inverting translator or as a differential line driver. When the common strobe input is at a low logic level, it forces all true outputs to the PECL low logic state (≈ +3.2V) and all inverting outputs to the PECL high logic state (≈ 4.1V). The SY10H351 can also be used with the SY10H350 to transmit and receive TTL/NMOS information differentially via balanced twisted pair lines. Single 5V power supply All VCC pins isolated on chip Differentially drive balanced lines tpd 1.3ns typical Fully compatible with ON Semiconductor MC10H351 Available in 20-pin PLCC package 8 D3 12 D2 14 COMMON 9 STROBE 16 17 19 18 /Q1 Q1 /Q0 Q0 /Q3 Q3 /Q2 Q2 18 D2 D0 1 2 5 4 VCC2 7 /Q3 D1 Q3 PIN CONFIGURATION BLOCK DIAGRAM Q2 ■ ■ ■ ■ ■ ■ SY10H351 FINAL 17 16 15 14 /Q2 19 13 NC VCCE 20 /Q1 1 Q1 2 NC 3 11 VCCT 10 GND 9 5 6 7 Common Strobe /Q0 VCC1 D1 8 D0 4 Q0 VCC (+5 VDC) = Pins 6, 11, 15, 20; GND = Pin 10 12 D3 Top View PLCC J20-1 PIN NAMES Pin Function D0 – D3 Inputs Q0 – Q3 Outputs /Q0 – /Q3 Inverted outputs VCC1 PECL VCC (5.0V) VCCE PECL VCC (5.0V) VCCT TTL VCC (5.0V) VCC2 PECL VCC (5.0V) Common Strobe Common Strobe GND Ground Rev.: A 1 Amendment: /1 Issue Date: August 2000 Micrel SY10H351 ABSOLUTE MAXIMUM RATINGS(1) Symbol Parameter VCC Power Supply Voltage IO Output Current –Continuous –Surge Tstore Storage Temperature TA Operating Temperature TRUTH TABLE Value Unit CS D Q /Q –0.5 to +7.0 V H L L H H H H L 50 100 mA H Open H L –65 to +150 °C L X L H 0 to +85 °C Open L L H Open H H L Open Open H L 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 VCC1 = VCC2 = VCCE = VCCT = 4.75V to 5.25V TA = 0°C Symbol TA = +25°C TA = +85°C Parameter Min. Max. Min. Typ. Max. Min. Max. Unit Condition ICC Power Supply Current ECL(1) TTL(2) — — 45 15 — — — — 45 15 — — 45 15 mA No output loads IR Reverse Current (Pins 7, 8, 12, 14) — 20 — — 20 — 20 µA IINH Reverse Current, (Pin 9) — 80 — — 80 — 80 µA IF Forward Current (Pins 7, 8, 12, 14) — –0.6 — — –0.6 — –0.6 mA IINL Forward Current, (Pin 9) — –2.4 — — –2.4 — –2.4 mA VBR(in) Input Breakdown Voltage 5.5 — 5.5 — — 5.5 — V VI Input Clamp Voltage — –1.5 — — –1.5 — –1.5 V Output HIGH Voltage(3) 3.98 4.16 4.02 — 4.19 4.08 4.27 V VOL Output LOW Voltage(3) 3.05 3.37 3.05 — 3.37 3.05 3.37 V VIH Input HIGH Voltage 2.0 — 2.0 — — 2.0 — V VIL Input LOW Voltage — 0.8 — — 0.8 — 0.8 V VOH NOTES: 1. Total ICC at VCC1, VCC2 and VCCE. 2. ICC at ICCT. 3. These values are for VCC = 5.0V. Level Specifications will vary 1:1 VCC. 2 IIN = –18mA Micrel SY10H351 AC ELECTRICAL CHARACTERISTICS VCC1 = VCC2 = VCCE = VCCT = 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 0.4 2.2 0.4 — 2.2 0.4 2.1 ns 50Ω to VCC–2V Delay(1) tPLH tPHL Propagation tr tf Output Rise/Fall Time (20% to 80%) 0.4 1.9 0.4 — 2.0 0.4 2.1 ns 50Ω to VCC–2V fMAX Maximum Input Frequency(2) 150 — 150 — — 150 — MHz 50Ω to VCC–2V NOTES: 1. Propagation delay is measured on this circuit from +1.5V on the input waveform to the 50% point on the output waveform. 2. These parameters are guaranteed but not tested. SWITCHING WAVEFORM 1ns/V (typical) 1ns/V (typical) +3.0V 90% INPUT +1.5V 10% 0V tPHL tPLH 80% COMPLEMENT tPHL tPLH 50% 20% TRUE tTLH tTHL Figure 1. Propagation Delay and Transition Times PRODUCT ORDERING CODE Ordering Code Package Type Operating Range VCC Range (V) SY10H351JC J20-1 Commercial +4.75 to +5.25 SY10H351JCTR J20-1 Commercial +4.75 to +5.25 3 Micrel SY10H351 20 LEAD PLASTIC LEADED CHIP CARRIER (J20-1) Rev. 00 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB USA 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