Harman Kardon AVR 347, Service Manual

Page: 130 / 218

TC7MZ4051,4052,4053FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC7MZ4051FK,TC7MZ4052FK,TC7MZ4053FK
TC7MZ4051FK 8-Channel Analog Multiplexer/Demultiplexer
TC7MZ4052FK Dual 4-Channel Analog Multiplexer/Demultiplexer
TC7MZ4053FK Triple 2-Channel Analog
Multiplexer/Demultiplexer
The TC7MZ4051/4052/4053FK are high-speed, low-voltage
drive analog multiplexer/demultiplexers using silicon gate CMOS
technology. In 3 V and 5 V systems these can achieve high-speed
operation with the low power dissipation that is a feature of
CMOS.
The TC7MZ4051/4052/4053FK offer analog/digital signal
selection as well as mixed signals. The 4051 has an 8-channel
configuration, the 4052 has an 4-channel × 2 configuration, and
the 4053 has a 2-channel × 3 configuration.
The switches for each channel are turned ON by the control pin
digital signals.
Although the control signal logical amplitude (V
CC
− GND) is small, the device can perform large-amplitude
(V
CC
− V
EE
) signal switching.
For example, if V
CC
= 3 V, GND = 0 V, and V
EE
= − 3 V, signals between − 3 V and +3 V can be switched from the
logical circuit using a single 3 V power supply.
All input pins are equipped with a newly developed input protection circuit that avoids the need for a diode on
the plus side (forward side from the input to the V
CC
). As a result, for example, 5 V signals can be permitted on the
inputs even when the power supply voltage to the circuits is off. As a result of this input power protection, the
TC7MZ4051/4052/4053FK can be used in a variety of applications, including in the system which has two power
supplies, and in battery backup circuits.
Features
·
Low ON resistance: R
on
= 22 Ω (typ.) (V
CC
− V
EE
= 3 V)
R
on
= 15 Ω (typ.) (V
CC
− V
EE
= 6 V)
· High speed: t
pd
= 3 ns (typ.) (V
CC
= 3.0 V)
· Low power dissipation: I
CC
= 4 µA (max) (Ta = 25°C)
·
Input level: V
IL
= 0.8 V (max) (V
CC
= 3 V)
V
IH
= 2.0 V (min) (V
CC
= 3 V)
· Power down protection is provided on all control inputs
·
Pin and function compatible with 74HC4051/4052/4053
Weight: 0.02 g (typ.)
AVR347
harman/kardon
130