Philips Semiconductors Product specification
74F756/74F757/74F760
Buffers
74F756 Octal Inverter Buffer (Open Collector)
74F757 Octal Buffer (Open Collector)
74F760 Octal Buffer (Open Collector)
2
1989 Nov 27 853–0270 98220
FEATURES
• 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. OE
a and OEb
(or OEb for the 74F757), each controlling four of the outputs.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL SUPPLY
CURRENT (TOTAL)
74F756 9.0ns 40mA
74F757 9.0ns 45mA
74F760 9.0ns 45mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION COMMERCIAL RANGE
V
CC
= 5V ±10%, T
amb
= 0°C to +70°C
PKG DWG #
20–pin plastic DIP N74F756N, N74F757AN, N74F760N SOT146-1
20–pin plastic SOL N74F756D, N74F757AD, N74F760D SOT163-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS DESCRIPTION
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Ian, Ibn Data inputs 1.0/1.67 20µA/1.0mA
OEa, OEb Output enable input (active Low) 1.0/1.67 20µA/0.2mA
OEb Output enable input (active High 74F757) 1.0/1.67 20µA/1.0mA
Yan, Ybn Data outputs (74F757, 74F760) OC/106.7 OC/64mA
Yan, Ybn Data outputs (74F756) OC/106.7 OC/64mA
Notes:
One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the Low state.
OC=Open Collector
