參數(shù)資料
型號: PCA5007
廠商: NXP Semiconductors N.V.
英文描述: Pager baseband controller
中文描述: 傳呼機基帶控制器
文件頁數(shù): 28/112頁
文件大?。?/td> 604K
代理商: PCA5007
1998 Oct 07
28
Philips Semiconductors
Product specification
Pager baseband controller
PCA5007
6.10
76.8 kHz oscillator
6.10.1
F
UNCTION
The oscillator produces a reference frequency of 76.8 kHz.
The frequency offset is compensated for by a separate
digital clock correction block. The oscillator operates
directly on V
BAT
and is always enabled.
6.10.2
O
SCILLATOR CIRCUITRY
The on-chip inverting oscillator amplifier is a single NMOS
transistor supplied with a constant current. The amplitude
visible at terminals XTL1 and XTL2 is therefore not a full
rail swing with a very high impedance. To reduce the
power consumption, the input Schmitt trigger buffer is
limited to approximately 100 kHz maximum frequency.
The whole circuit operates directly at the battery supply.
The 76.8 kHz oscillator cannot be disabled. It also
continues its operation during DC/DC converter off or
8051 stop mode.
The simplest application configuration is shown in Fig.12a.
C1 and C2 can be added to operate a crystal at its
optimum load condition. The resulting capacitance of the
series connection of C1 and C2 must be smaller than 5 pF
for a guaranteed start-up of the oscillator.
Fig.12 Oscillator circuit.
handbook, full pagewidth
MGR115
2 M
76.8 kHz
10 pF
(a)
(b)
(c)
10 pF
76.8 kHz
76.8 kHz
76.8 kHz
XTL1
XTL2
76.8 kHz
10 pF
10 pF
XTL1
XTL2
2 M
C1
VP = VBAT
fmax = 100 kHz
C2
10 pF
10 pF
XTL1
XTL2
相關(guān)PDF資料
PDF描述
PCA5007H Pager baseband controller
PCA5010 Pager baseband controller
PCA5010H Pager baseband controller
PCA82C200 STAND-ALONE CAN-CONTROLLER
PCA82C200P STAND-ALONE CAN-CONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA5007H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pager baseband controller
PCA5007H/XXX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
PCA5010 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pager baseband controller
PCA5010H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pager baseband controller
PCA5010H/XXX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|QFP|48PIN|PLASTIC