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SN74GTL16923DGGR Arkusz danych(PDF) 4 Page - Texas Instruments |
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SN74GTL16923DGGR Arkusz danych(HTML) 4 Page - Texas Instruments |
4 / 13 page www.ti.com Absolute Maximum Ratings (1) Recommended Operating Conditions (1) (2) (3) (4) SN74GTL16923 18-BIT LVTTL-TO-GTL/GTL+ BUS TRANSCEIVER SCBS674G – AUGUST 1996 – REVISED APRIL 2005 over operating free-air temperature range (unless otherwise noted) MIN MAX UNIT VCC Supply voltage range –0.5 4.6 V VI Input voltage range(2) –0.5 7 V VO Voltage range applied to any output in the high or power-off state(2) –0.5 7 V A port 48 IO Current into any output in the low state mA B port 100 IO Current into any A-port output in the high state(3) 48 mA Continuous current through each VCC or GND ±100 mA IIK Input clamp current VI < 0 –50 mA IOK Output clamp current VO < 0 –50 mA θ JA Package thermal impedance(4) 55 °C/W Tstg Storage temperature range –65 150 °C (1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. (3) This current flows only when the output is in the high state and VO > VCC. (4) The package thermal impedance is calculated in accordance with JESD 51-7. MIN NOM MAX UNIT VCC Supply voltage 3.15 3.3 3.45 V GTL 1.14 1.2 1.26 VTT Termination voltage V GTL+ 1.35 1.5 1.65 GTL 0.74 0.8 0.87 VREF Reference voltage V GTL+ 0.87 1 1.1 B port 0 VTT VI Input voltage V Except B port 0 5.5 B port VREF + 50 mV VIH High-level input voltage V Except B port 2 B port VREF – 50 mV VIL Low-level input voltage V Except B port 0.8 IIK Input clamp current –18 mA IOH High-level output current A port –24 mA A port 24 IOL Low-level output current mA B port 50 TA Operating free-air temperature –40 85 °C (1) All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report Implications of Slow or Floating CMOS Inputs, literature number SCBA004. (2) Normal connection sequence is GND first, VCC = 3.3 V, I/O, control inputs, VTT, VREF (any order) last. (3) VTT and RTT can be adjusted to accommodate backplane impedances if the dc recommended IOL ratings are not exceeded. (4) VREF can be adjusted to optimize noise margins, but normally is two-thirds VTT. 4 |
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