Document
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Octal Bus Buffer
The MC74VHC541 is an advanced high speed CMOS octal bus buffer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. The MC74VHC541 is a noninverting type. When either OE1 or OE2 are high, the terminal outputs are in the high impedance state. The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. The inputs tolerate voltages up to 7V, allowing the interface of 5V systems to 3V systems. • • • • • • • • • • • High Speed: tPD = 3.7ns (Typ) at VCC = 5V Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C High Noise Immunity: VNIH = VNIL = 28% VCC Power Down Protection Provided on Inputs Balanced Propagation Delays Designed for 2V to 5.5V Operating Range Low Noise: VOLP = 1.2V (Max) Pin and Function Compatible with Other Standard Logic Families Latchup Performance Exceeds 300mA ESD Performance: HBM > 2000V; Machine Model > 200V Chip Complexity: 134 FETs or 33.5 Equivalent Gates
MC74VHC541
DW SUFFIX 20–LEAD SOIC WIDE PACKAGE CASE 751D–04
DT SUFFIX 20–LEAD TSSOP PACKAGE CASE 948E–02
M SUFFIX 20–LEAD SOIC EIAJ PACKAGE CASE 967–01 ORDERING INFORMATION MC74VHCXXXDW SOIC WIDE MC74VHCXXXDT TSSOP MC74VHCXXXM SOIC EIAJ
LOGIC DIAGRAM
A1 A2 A3 A4 A5 A6 A7 A8 OUTPUT ENABLES OE1 OE2 2 3 4 5 6 7 8 9 1 19 18 17 16 15 14 13 12 11 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8
PIN ASSIGNMENT
NONINVERTING OUTPUTS OE1 A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC OE2 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8
DATA INPUTS
FUNCTION TABLE
Inputs Output Y OE1 L L H X OE2 L L X H A L H X X L H Z Z
4/98
© Motorola, Inc. 1998
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ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ
MAXIMUM RATINGS*
Symbol VCC Vin Parameter Value Unit V V V DC Supply Voltage DC Input Voltage – 0.5 to + 7.0 – 0.5 to + 7.0 Vout IIK DC Output Voltage – 0.5 to VCC + 0.5 – 20 ± 20 ± 25 ± 50 500 450 Input Diode Current mA mA mA mA IOK Iout Output Diode Current DC Output Current, per Pin ICC PD DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Storage Temperature SOIC Packages† TSSOP Package† mW Tstg – 65 to + 150
MC74VHC541
This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, Vin and Vout should be constrained to the range GND (Vin or Vout) VCC. Unused inputs mus.