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74HC_HCT299 数据表(PDF) 6 Page - NXP Semiconductors |
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74HC_HCT299 数据表(HTML) 6 Page - NXP Semiconductors |
6 / 24 page 74HC_HCT299_3 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 03 — 28 July 2008 6 of 24 NXP Semiconductors 74HC299; 74HCT299 8-bit universal shift register; 3-state 6. Functional description [1] H = HIGH voltage level; L = LOW voltage level; ↑ = LOW to HIGH CP transition; X = don’t care. 7. Limiting values [1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. DSL 18 serial data shift-left input S1 19 mode select input VCC 20 positive supply voltage Table 2. Pin description …continued Symbol Pin Description Table 3. Function table[1] Input Response MR S1 S0 CP L X X X asynchronous reset; Q0 to Q7 = LOW HHH ↑ parallel load; I/On → Qn HL H ↑ shift right; DSR → Q0, Q0 → Q1, etc. HHL ↑ shift left; DSL → Q7, Q7 → Q6, etc. H L L X hold Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit VCC supply voltage −0.5 +7 V IIK input clamping current VI < −0.5 V or VI >VCC + 0.5 V [1] - ±20 mA IOK output clamping current VO < −0.5 V or VO >VCC + 0.5 V [1] - ±20 mA IO output current −0.5 V < VO < VCC + 0.5 V standard outputs - ±25 mA bus driver outputs - ±35 mA ICC supply current standard outputs - 50 mA bus driver outputs - 70 mA IGND ground current standard outputs −50 - mA bus driver outputs −70 - mA Tstg storage temperature −65 +150 °C Ptot total power dissipation Tamb = −40 °C to +125 °C DIP20 package [2] - 750 mW SO20 package [3] - 500 mW (T)SSOP20 package [4] - 500 mW |
类似零件编号 - 74HC_HCT299_15 |
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类似说明 - 74HC_HCT299_15 |
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