U2784B Datasheet, PDF (1/11 Pages) TEMIC Semiconductors – 2200 MHz / 200 MHz Twin PLL

2200 MHz / 200 MHz Twin PLL
U2784B
Description
U2784B is a low power twin PLL manufactured with
TEMIC’s advanced UHF process. The maximum operat-
ing frequency is 2200 MHz and 200 MHz respec tively.
It features a wide supply voltage range from 2.7 to 5.5 V.
Prescaler and power down function for both PLL’s is inte-
grated. Applications are DECT, DCS 1800 and WLAN.
Features
D Very low current consumption (typical 3 V/12 mA)
D Supply voltage range 2.7 to 5.5 V
D Maximum input frequency PLL1: 2200 MHz,
PLL2: 200 MHz
D 2 pins for separate power down functions
D Output for PLL lock status
D Prescaler 64/65 for PLL1 and 8/9 for PLL2
D SSO-20 package
D ESD protected according to MIL-STD 833
method 3015 cl. 2
Benefits
D Low current consumption leads to extended talk time
D Twin PLL saves costs and space
D One foot print for all TEMIC twin PLL’s saves design-
in time
Block Diagram
V_S analog ⁴
V_S digital ²
DGND ⁶
AGND ¹⁵
7
OSCi
OSCo ⁸
Oscillator
Power
down Test
Control functions
16 bit latch
Ports
Lock
select
1
5I/Port 0
9
HPD1/Port1
14 _HPD2/Port4
Port3
20
10 _{Lock Port2}
on / off
divide by 2
RFi1 ⁵ 64 / 65 Prescaler 1
12 bit latch 1
12 bit reference divider 1
17 bit latch 1
17 bit main divider 1
Phase
detector 1
Charge
pump 1
3 _CP1
V_Scp
17
11
Clock
Data ¹²
Enable ¹³
3 bit
Load control
RFi2 ¹⁶ 8 / 9 Prescaler 2
17 bit
Shift register
12 bit latch 2
12 bit reference divider 2
14 bit latch 2
14 bit main divider 2
Figure 6.
Pump
bias
19 _Iset
Phase
detector 2
Charge
pump 2
18 _CP2
95 10611
TELEFUNKEN Semiconductors
Rev. A2, 29-Jul-96
1 (11)