LMV112 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – 40 MHz Dual Clock Buffer

June 2005
LMV112
40 MHz Dual Clock Buffer
General Description
The LMV112 is a high speed dual clock buffer designed for
portable communications and accurate multi-clock systems.
The LMV112 integrates two 40 MHz low noise buffers which
optimizes application and out performs large discrete solu-
tions. This device enables superb system operation between
the base band and the oscillator signal path while eliminating
crosstalk.
National Semiconductor’s unique technology and design de-
liver accuracy, capacitance and load resistance while in-
creasing the drive capability of the device. The low power
consumption makes the LMV112 perfect for battery applica-
tions.
The robust, independent, and flexible buffers are designed to
provide the customer with the ability to manage complex
clock signals in the latest wireless applications. The buffers
deliver 110 V/µs internal slew rate with independent shut-
down and duty cycle precision. The patented analog circuit
drives capacitive loads beyond 20 pF. National’s proven
biasing technique has 1V centering, rail-to-rail input/output
unity gain, and AC coupled convenient inputs. These inte-
grated cells save space and require no external bias resis-
tors. National’s rapid recovery after disable optimizes perfor-
mance and current consumption. The LMV112 offers
individual enable pin controls and since there is no internal
ground reference either single or split supply configurations
offer additional system flexibility and power choices.
The LMV112 is a proven replacement for any discrete cir-
cuitry and simplifies board layout while minimizing related
parasitic components.
The LMV112 is produced in the small LLP package which
offers high quality while minimizing its use of PCB space.
National’s advanced packaging offers direct PCB-IC evalu-
ation via pin access.
Features
(Typical values are: V_SUPPLY = 2.7V and C_L = 20 pF, unless
otherwise specified)
n Small signal bandwidth
40 MHz
n Supply voltage range
2.4V to 5V
n Slew rate
110 V/µs
n Total supply current
1.6 mA
n Shutdown current
59 µA
n Rail-to-rail input and output
n Individual buffer enable pins
n Rapid T_on technology
n Crosstalk rejection circuitry
n 8-pin LLP, pin access packaging
n Temperature range
−40˚C to 85˚C
Applications
n 3G mobile applications
n WLAN–WiMAX modules
n TD_SCDMA multi-mode MP3 and camera
n GSM modules
n Oscillator modules
Typical Application
© 2005 National Semiconductor Corporation DS201353
20135302
www.national.com