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SN74GTL1655DGGRE4 데이터시트(PDF) 8 Page - Texas Instruments |
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SN74GTL1655DGGRE4 데이터시트(HTML) 8 Page - Texas Instruments |
8 / 17 page www.ti.com Timing Requirements A-to-B Switching Characteristics SN74GTL1655 16-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVER WITH LIVE INSERTION SCBS696I – JULY 1997 – REVISED APRIL 2005 over recommended ranges of supply voltage and operating free-air temperature, V TT = 1.2 V, VREF = 0.8 V, and VERC = VCC or GND for GTL (unless otherwise noted) MIN MAX UNIT fclock Clock frequency 160 MHz LE high 3 tw Pulse duration ns CLK high or low 3 Data before CLK ↑ 2.7 tsu Setup time CLK high 2.8 ns Data before LE ↓ CLK low 2.6 Data after CLK ↑ 0.4 th Hold time ns Data after LE ↓ CLK high or low 0.9 over recommended ranges of supply voltage and operating free-air temperature, V TT = 1.2 V, VREF = 0.8 V, and VERC = VCC or GND for GTL (see Figure 1) FROM TO PARAMETER MIN TYP MAX UNIT (INPUT) (OUTPUT) fmax 160 MHz tPLH 3.1 5.2 A B ns VERC = VCC tPHL 2.6 6.2 tPLH 3.4 5.5 CLK B ns VERC = VCC tPHL 2.4 5.8 tPLH 3.5 5.8 LEAB B ns VERC = VCC tPHL 2.6 6.4 ten 3.3 5.4 OEAB or OE B ns VERC = VCC tdis 2.7 5.9 tPLH 2.3 4.3 A B ns VERC = GND tPHL 1.9 4.3 tPLH 2.7 4.8 CLK B ns VERC = GND tPHL 1.8 4.3 tPLH 2.8 4.9 LEAB B ns VERC = GND tPHL 2 4.8 ten 2.5 4.5 OEAB or OE B ns VERC = GND tdis 2 4.2 VERC = GND 0.6 tr Transition time, B outputs (0.6 V to 1 V) ns VERC = VCC 1.2 VERC = GND 1.1 tf Transition time, B outputs (1 V to 0.6 V) ns VERC = VCC 1.7 Skew between drivers in the same package tsk(o)(1) 1 ns switching in the same direction Skew between drivers tsk(o)(2) 1 ns switching in any direction in the same package (1) Skew values are applicable for through mode only. (2) Skew values are applicable for CLK mode only, with all outputs switching simultaneously. 8 |
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