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74ABT845 数据表(PDF) 1 Page - NXP Semiconductors |
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74ABT845 数据表(HTML) 1 Page - NXP Semiconductors |
1 / 7 page Philips Semiconductors Product specification 74ABT845 8-bit bus interface latch with set and reset (3-State) 1 1995 Sep 06 853-1703 15702 FEATURES • High speed parallel latches • Ideal where high speed, light loading, or increased fan-in are required with MOS microprocessors • Broadside pinout • Output capability: +64mA/–32mA • Power-up 3-State • Power-up reset • Latch-up protection exceeds 500mA per Jedec Std 17 • ESD protection exceeds 2000 V per MIL STD 883 Method 3015 and 200 V per Machine Model DESCRIPTION The 74ABT845 consists of eight D-type latches with 3-State outputs. In addition to the LE, OE, MR and PRE pins, the 74ABT845 has two additional OE pins, making a total of three Output Enable (OE0, OE1, OE2) pins. The multiple Output enables allow multiuser control of the interface, e.g., CS, DMA, and RD/WR. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS Tamb = 25°C; GND = 0V TYPICAL UNIT tPLH tPHL Propagation delay Dn to Qn CL = 50pF; VCC = 5V 5.4 ns CIN Input capacitance VI = 0V or VCC 4 pF COUT Output capacitance Outputs disabled; VO = 0V or VCC 7 pF ICCZ Total supply current Outputs disabled; VCC = 5.5V 500 nA ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER 24-Pin Plastic DIP –40 °C to +85°C 74ABT845 N 74ABT845 N SOT222-1 24-Pin plastic SO –40 °C to +85°C 74ABT845 D 74ABT845 D SOT137-1 24-Pin Plastic SSOP Type II –40 °C to +85°C 74ABT845 DB 74ABT845 DB SOT340-1 24-Pin Plastic TSSOP Type I –40 °C to +85°C 74ABT845 PW 74ABT845PW DH SOT355-1 PIN CONFIGURATION 1 2 3 4 5 6 7 8 9 10 15 16 17 18 19 20 21 22 23 24 OE0 OE1 D0 D1 D2 D3 D4 D5 D6 Q6 D7 Q5 Q4 Q3 Q2 Q1 Q0 OE2 VCC Q7 11 14 MR PRE 12 13 GND LE TOP VIEW SA00258 PIN DESCRIPTION PIN NUMBER SYMBOL FUNCTION 1, 2, 23 OE0 – OE2 Output enable inputs (active-Low) 3, 4, 5, 6, 7, 8, 9, 10 D0-D7 Data inputs 22, 21, 20, 19,18, 17, 16, 15 Q0-Q7 Data outputs 11 MR Master reset input (active-Low) 13 LE Latch enable input (active-High) 14 PRE Preset input (active-Low) 12 GND Ground (0V) 24 VCC Positive supply voltage |
类似零件编号 - 74ABT845 |
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类似说明 - 74ABT845 |
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