74F757 Datasheet | Philips Semiconductors

FEATURES 74F756/74F757/74F760 - Octal bus interface - Open collector versions of 74F240, 74F241 and 74F244 DESCRIPTION The 74F756, 74F757 and 74F760 are octal buffers that are ideal for driving bus lines of buffer memory address registers. The 74F756 is the open collector version of 74F240, 74F757 is the open collector version of 74F241 and 74760 is the open collector version of 74F244. These devices feature two Output Enables. OEa and OEb (or OEb for the 74F757), each controlling four of the outputs. TYPE 74F756 74F757 74F760 TYPICAL PROPAGATION DELAY 9.0ns 9.0ns 9.0ns TYPICAL SUPPLY CURRENT (TOTAL) 40m A 45m A 45m A ORDERING INFORMATION ORDER CODE DESCRIPTION 20- pin plastic DIP 20- pin plastic SOL MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F756N, N74F757AN, N74F760N N74F756D, N74F757AD, N74F760D PKG DWG # SOT146-1 SOT163-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS Ian, Ibn OEa, OEb OEb Yan, Ybn Yan, Ybn Data inputs Output enable input (active Low) Output enable input (active High 74F757) Data outputs (74F757, 74F760) Data outputs (74F756) DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/1.67 1.0/1.67 1.0/1.67 OC/106.7 OC/106.7 LOAD VALUE HIGH/LOW 20µA/1.0m A 20µA/0.2m A 20µA/1.0m A OC/64m A OC/64m A Notes: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6m A in the Low state. OC=Open Collector 1989 Nov 27 853- 0270 98220 Philips Semiconductors Product specification Buffers 74F756/74F757/74F760 PIN CONFIGURATION for 74F756 OEa Ia0 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 Yb3 1 2 3 4 5 6 7 8 9 20 VCC 19 OEb 18 Ya0 IEC/IEEE SYMBOL for 74F756 1 19 EN1 EN2 18 16 14 12 2 3 5 7 9 2 17 Ib0 4 16 Ya1 15 Ib1 14 Ya2 13 Ib2 12 Ya3 11 Ib3 6 8 17 15 13 11 GND 10 SF00320 SF01246 LOGIC SYMBOL for 74F756 2 4 6 8 17 15 13 11 LOGIC DIAGRAM for 74F756 Ia0 2 18 Ya0 Ib0 17 3 Yb0 Ia0 1 19 OEa Ia1 Ia2 Ia3...