74F540N Datasheet, PDF (2/10 Pages) NXP Semiconductors – Octal inverter buffer (3- State)

Philips Semiconductors
Buffers
Product specification
74F540, 74F541
74F540 Octal Inverter Buffer (3-State)
74F541 Octal Buffer (3-State)
FEATURES
• High impedance NPN base inputs for reduced loading
(20µA in High and Low states)
• Low power, light bus loading
• Functionally similar to the 74F240 and 74F241
• Provides ideal interface and increases fan-out of MOS
microprocessors
• Efficient pinout to facilitate PC board layout
• Octal bus interface
• 3-State buffer outputs sink 64mA
• 15mA source current
DESCRIPTION
The 74F540 and 74F541 are octal buffers that are ideal for driving
bus lines or buffer memory address registers. The outputs are
capable of sinking 64mA and sourcing up to 15mA, producing very
good capacitive drive characteristics. The devices feature input and
outputs on opposite sides of the package to facilitate printed circuit
board layout.
TYPE
TYPICAL
PROPAGATION DELAY
74F540
74F541
3.5ns
5.5ns
TYPICAL SUPPLY
CURRENT
(TOTAL)
58mA
55mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V_CC = 5V ±10%,
T_amb = 0°C to +70°C
PKG DWG #
20-Pin Plastic DIP
N74F540, N74F541N SOT146-1
20-Pin Plastic SOL
N74F540D, N74F541D SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
I0–I7
Data inputs
1.0/0.033
OE0, OE1
3-State output enable inputs (active Low)
1.0/0.033
Y0 - Y7
Data outputs (74F541)
750/106.7
Y0 - Y7
Data outputs (74F540)
750/106.7
NOTE: One (1.0) FAST Unit Load is defined as: 20µA in the High state and 0.6mA in the Low state.
PIN CONFIGURATION – 74F540
PIN CONFIGURATION – 74F541
LOAD VALUE
HIGH/LOW
20µA/20µA
20µA/20µA
15mA/64mA
15mA/64mA
OE0 1
I0 2
I1 3
I2 4
I3 5
I4 6
I5 7
I6 8
I7 9
GND 10
20 VCC
19 OE1
18 Y0
17 Y1
16 Y2
15 Y3
14 Y4
13 Y5
12 Y6
11 Y7
SF01060
OE0 1
I0 2
I1 3
I2 4
I3 5
I4 6
I5 7
I6 8
I7 9
GND 10
20 VCC
19 OE1
18 Y0
17 Y1
16 Y2
15 Y3
14 Y4
13 Y5
12 Y6
11 Y7
SF01021
1990 Jan 08
2
853–0068 98494