Harman Kardon AVR 1650, Service Manual

Page: 112 / 159

TC74VCX541FT/FK/FTG
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VCX541FT, TC74VCX541FK, TC74VCX541FTG
Low-Voltage Octal Bus Buffer with 3.6 V Tolerant Inputs and Outputs
The TC74VCX541 is a high performance CMOS octal bus
buffer which is guaranteed to operate from 1.2-V to 3.6-V.
Designed for use in 1.5V, 1.8 V, 2.5 V or 3.3 V systems, it
achieves high speed operation while maintaing the CMOS low
power dissipation.
It is also designed with over voltage tolerant inputs and
outputs up to 3.6 V.
The device is a non-inverting 3-state buffer having two
active-low output enables. When either OE1 or OE2 are high, the
terminal outputs are in the high-impedance state. This device is
designed to be used with 3-state memory address drivers, etc.
All inputs are equipped with protection circuits against static
discharge.
Features (Note 1)
Low voltage operation: V
CC
= 1.2~3.6 V
High speed operation: t
pd
= 3.5 ns (max) (V
CC
= 3.0~3.6 V)
t
pd
= 4.2 ns (max) (V
CC
= 2.3~2.7 V)
t
pd
= 8.4 ns (max) (V
CC
= 1.65~1.95 V)
t
pd
= 16.8 ns (max) (V
CC
= 1.4~1.6 V)
t
pd
= 42.0 ns (max) (V
CC
= 1.2 V)
3.6 V tolerant inputs and outputs.
Output current: I
OH
/I
OL
= ±24 mA (min) (V
CC
= 3.0 V)
I
OH
/I
OL
= ±18 mA (min) (V
CC
= 2.3 V)
I
OH
/I
OL
= ±6 mA (min) (V
CC
= 1.65 V)
I
OH
/I
OL
= ±2 mA (min) (V
CC
= 1.4 V)
Latch-up performance: 300 mA
ESD performance: Machine model 200 V
Human body model 2000 V
Package: TSSOP
VSSOP (US)
VQON
Power down protection is provided on all inputs and outputs.
Note 1: When mounting VQON package, the type of recommended flux is RA or RMA.
TC74VCX541FT
TC74VCX541FK
TC74VCX541FTG
VQON20-0404-0.50
Weight
TSSOP20-P-0044-0.65A
: 0.08 g (typ.)
VSSOP20-P-0030-0.50 : 0.03 g (typ.)
VQON20-P-0404-0.50 : 0.0145g (typ.)
AVR 1650 harman/kardon
112