 
74LX1G04 Product
Page
Today’s cell phones require clock buffering of the
system reference Voltage Controlled Temperature Controlled
Crystal Oscillator (VCTCXO). The VCTCXO is used in these systems
to ensure excellent phase noise performance, and to allow
frequency stability to the Base Band ASIC and Transmitter
PLLs. |
| ST's Single Gate / Inverter Solution |
ST’s 74LX1G04 reference clock buffering solution is ideal for
this application. This buffering solution provides enhanced signal
drive (up to +/- 24mA), which guarantees effective phase locking
performance of the PLL circuitry. This space saving approach allows
the designer to conveniently place the single gate next to the VCTCXO.
These single gate buffers are provided by a number of integrated
circuit manufacturers like Toshiba, Fairchild, TI and Philips.
| Beetween VCTCXO & ASIC |
 The
74LX1G04 single gate inverter solution is used in the cellular
application shown below. It is positioned between the VCTCXO,
Base Band ASIC that provides the GSM/CDMA protocol control.
It is also positioned between the VCTCXO and the RF transmitter. |
The 74LX1G04 offers the widest operating voltage range in the industry,
from 1.65V to 5.5V, with a maximum standby current of 10µA
much less than our competitors (20µA). The wide voltage range
and low standby current is perfectly suited for current and next
generation power efficient cell phone designs. This makes ST’s
device a best choice over Toshiba’s TC7SZ04 and Fairchild’s
NC7SZ04.
| P / N |
SOT23-5L |
SOT323-5L |
Flip-Chip |
| 74LX1G04 |
74LX1G04STR |
74LX1G04CTR |
74LX1G04BJR |
| Key Features and Specifications |
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Single power supply operation 1.65V to 5.5V
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High output drive: +/-24mA @ 3.3mA
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Power down, high impedance I/O
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Low standby current: 10µA max
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Easy placement in space constrained designs
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Available in SOT23-5L, SOT323-5L and Flip-Chip |
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