TLC2942 Datasheet, PDF (1/28 Pages) Texas Instruments – HIGH-PERFORMANCE DUAL PHASE-LOCKED LOOP BUILDING BLOCK

TLC2942
HIGH-PERFORMANCE DUAL PHASE-LOCKED LOOP BUILDING BLOCK
SLAS146B – NOVEMBER 1996 – REVISED JUNE 1997
D Dual TLC2932 by Multichip Module (MCM)
DB PACKAGE
Technology
(TOP VIEW)
D Voltage-Controlled Oscillator (VCO)
Section:
– Complete Oscillator Using Only One
External Bias Resistor (R_BIAS)
– Recommended Lock Frequency Range:
22 MHz to 50 MHz (V_DD = 5 V ±5%,
T_A = – 20°C to 75°C, ×1 Output)
11 MHz to 25 MHz (V_DD = 5 V ±5%,
T_A = – 20°C to 75°C, ×1/2 Output)
– Output Frequency . . . ×1 and ×1/2
Selectable
LOGIC V_{DD1 1}
SELECT1 ₂
VCO OUT1 ₃
F_IN–A1 ₄
F_IN–B1 ₅
PFD OUT1 ₆
LOGIC GND1 ₇
GND 8
NC 9
NC 10
38 ^{VCO V}DD1
37 ^BIAS1
36 ^VCOIN1
35 ^{VCO GND1}
34 ^VCOINHIBIT1
33 ^{PFD INHIBIT1}
32 ^NC
31 ^GND
30 ^NC
29 ^NC
D Includes a High-Speed Edge-Triggered
Phase Frequency Detector (PFD) With
Internal Charge Pump
D Independent VCO, PFD Power-Down Mode
NC 11
GND 12
LOGIC V_DD2 13
SELECT2 14
VCO OUT2 15
28 ^NC
27 ^GND
26 ^{VCO V}_DD2
25 ^BIAS2
24 VCOIN2
description
F_IN–A2 16
F_IN–B2 17
23 VCO GND2
22 VCOINHIBIT2
The TLC2942 is a multichip module product that
PFD OUT2 18
21 PFD INHIBIT2
uses two TLC2932 chips. The TLC2932 chip is LOGIC GND2 19
20 NC
composed of a voltage-controlled oscillator and
an edge-triggered phase frequency detector. The NC – No internal connection
oscillation frequency range of each VCO is set by
an external bias resistor (R_BIAS) and each VCO output can be a ×1 or ×1/2 output frequency. Each high speed
PFD with internal charge pump detects the phase difference between the reference frequency input and signal
frequency input from the external counter. The VCO and the PFD have inhibit functions that can be used as a
power-down mode. The high-speed and stable oscillation capability of the TLC2932 makes the TLC2942
suitable for use in dual high-performance phase-locked loop (PLL) systems.
AVAILABLE OPTIONS
PACKAGE
TA
SMALL OUTLINE
(DB)
–20°C to 75°C
TLC2942IDB
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1997, Texas Instruments Incorporated
1