3.5.7 function introduction to UTCLM4880
1. DESCRIPTION
The UTC LM4880 is a dual audio power amplifier capable of delivering typically 250mW per channel of
continuous average power to an 8
O
load with 0.1% THD+N using a 5V power supply.
The UTC LM4880 features an externally controlled, low-power consumption shutdown mode, as well as
an internal thermal shutdown protection mechanism. The unity-gain stable UTC LM4880 can be configured
by external gain-setting resistors.
2. FEATURES
◆
No bootstrap capacitors or snubber circuits are necessary
◆
Unity-gain stable
◆
External gain configuration capability
3. PIN DESCRIPTION
PIN No.
Symbol
I/O
Description
1
Out A
O
R Output
2
In A
I
R Input
3
Bypass
O
Bypass capacitor
4
GND
I
GND
5
Shutdown
I
Shutdown control
6
In B
I
L Input
7
Out B
O
L Output
8
Vdd
I
VDD
3.5.8 function introduction to 74HC04
1. DESCRIPTION
The MC74HC04A is identical in pinout to the LS04 and the MC14069. The device inputs are compatible with
Standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
The device consists of six three–stage inverters.
2. FEATURES
?
◆
Output Drive Capability: 10 LSTTL Loads
◆
Outputs Directly Interface to CMOS, NMOS and TTL
?
◆
Operating Voltage Range: 2 to 6V
◆
Low Input Current: 1
A
？
- 59 -
