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STV1389AQ
CABLE DRIVER FOR DIGITAL TRANSFER
APPLICATIONS DATA TRANSFER BETWEEN DIGITAL SIGNAL PROCESSING EQUIPMENT
QFP32 (Plastic Package) ORDER CODE : STV1389AQ
. . . . .
1 DIFFERENTIAL INPUT, 3 DIFFERENTIAL OUTPUTS SUFFICIENT DRIVE CAPABILITY FOR A 300m LENGTH COAXIAL CABLE STABILITY DUE TO MINIMAL WAVEFORM DISTORTION BIPOLAR SILICON MONOLITHIC IC
DESCRIPTION The STV1389AQ offers in a single-chip a complete IC driver for digital data transfer. PIN CONNECTIONS
GND5 18
GND
N.C.
GND
24 GND6 GND7 3B N.C. GND GND N.C. 1A 25 26 27 28 29 30 31 32 1 GND2
23
22
21
20
19
N.C.
17 16 15 14 13 12 11 10 9 2A N.C. VEE VEE VEE VEE N.C. INX
2 GND3
3 1B
4 GND
5 GND
6 GND
7 INY
N.C.
GND4 8
3A
2B
November 1992
1/7
1389-01.EPS
STV1389AQ
PIN DESCRIPTION
Pin Number Symbol Standard DC Voltage Equivalent Circuit Description
GND
180 7 1mA 2k
7 9
INY INX
- 2.7V
2k
Input pin of the differential amplifier. Input executed after DC portion is cut off.
1mA
9 180
VEE
GND
1 2 17 18 25 26
GND2 GND3 GND4 GND5 GND6 GND7
1k
1389-02.EPS
-
1 2 17 18 25 26
Collector of the emitter follower output Tr. Connect to GND.
1389-03.EPS
VEE
2/7
1389-01.TBL
32 3 16 20 23 27
1A 1B 2A 2B 3A 3B
- 2.7V
1mA
32 3 16 20 23 27
Emitter of emitter follower output Tr. To use, connect pull-down resistor. (Even when only 1 side is used pull-down is executed In pairs.) Pairs 32 16 23 3 20 27
STV1389AQ
BLOCK DIAGRAM
N.C. 24 3A 23 GND 22 GND 21 2B 20 N.C. 19 GND5 GND4 18 17 When the below input is applied between INX and INY, in-phase 1.6Vp-p is output at 1A, 2A and 3A. In reversed phase, 1.6Vp-p is output at 1B, 2B and 3B. * Various output pins are connected as indicated below. 3B 27 -5V 14 VEE 0.1F N.C. 28 13 VEE 150 GND 29 12 VEE -5V GND 30 BIAS GEN 11 VEE 75 Co-axial cable
GND6 25
16 2A
1.6Vp-p
GND7 26
15 N.C.
N.C. 31
10 N.C.
1A 32
9
INX 0.1F
1
2
3 1B
4 GND
5 GND
6 GND
7 INY
8 N.C. 0.6Vp-p
GND2 GND3
0.1F 0.6Vp-p
1389-04.EPS
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Tstg PD Supply Voltage Storage Temperature Allowable Power Dissipation Parameter Value 7.0 - 65, + 150 500 Unit V
o
C
mW
OPERATING CONDITIONS
VCC Topr Supply Voltage Operating Temperature 4.8 to 5.2 - 20, + 75 V
o
1389-03.TBL 1389-04.TBL
Symbol
Parameter
Value
Unit C
ELECTRICAL CHARACTERISTICS
Symbol V1 V2 A1-1 B1-1 A2-1 B2-1 Parameter Pin Voltage INY Pin Voltage INX PIn Voltage 1A Pin Voltage 1B PIn Voltage 2A Pin Voltage 2B Bias Conditio ns V INY V INX SW ON Test Point Pin 7 PIn 9 Pin 32 Test of pin voltage Pin 3 Pin 16 Pin 3 Test Min. - 2.9 - 2.9 - 3.1 - 3.1 - 3.1 - 3.1 Typ. - 2.7 - 2.7 - 2.7 - 2.7 - 2.7 - 2.7 Max. - 2.5 - 2.5 - 2.5 - 2.5 - 2.5 - 2.5 Unit V V V V V V
3/7
1389-02.TBL
STV1389AQ
ELECTRICAL CHARACTERISTICS (TA = 25oC)
Symbol A3-1 B3-1 IEE A1-2 B1-2 A2-2 B2-2 A3-2 B3-2 V1-1 V2-1 V3-1 A1-3 B1-3 A2-3 B2-3 A3-3 B3-3 V1-2 V2-2 V3-2 V1-3 V2-3 V3-3 Parameter PIn Voltage 3A Pin Voltage 3B Current Power Supply DC applied 1A DC applied 1B DC applied 2A DC applied 2B DC applied 3A DC applied 3B Amplitude 1A + 1B Amplitude 2A + 2B Amplitude 3A + 3B Amplitude 1A/1B Amplitude 2A/2B Amplitude 3A/3B DC applied 1A' DC applied 1B' DC applied 2A' DC applied 2B' DC applied 3A' DC applied 3B' Amplitud'e 1A' + 1B Amplitude 2A' + 2B' Amplitude 3A' + 3B' Amplitude 1A' + 1B' Amplitude 2A' + 2B' Amplitude 3A' + 3B' Linearity 1 Linearity 2 Linearity 3 V1 - 0.4 Bias Conditions V INY V1 + 0.2 V INX V2 - 0.2 SW ON Test Point Pin 23 Pin 27 VEE Test Test of pin voltage Current power supply at VEE Min. - 3.1 - 3.1 - 143 0.31 0.47 0.31 0.47 0.31 0.47 0.65 (V1-1) = (A1-2) - (B1-2) Amplitude calculated from T10 with T15 as base, same for V2-1, V3-1. 0.65 0.65 0.85 (A1-2) / (B1-2) 0.85 0.85 0.39 0.39 0.39 0.39 0.39 0.39 0.75 0.75 0.75 1.0 1.0 1.0 0.75 0.75 0.75 0.75 0.75 0.75 1.5 1.5 1.5 1.0 1.0 1.0 1.9 1.9 1.9 Typ. Max. Unit - 2.7 - 2.7 - 2.5 - 2.5 - 77 0.47 0.31 0.47 0.31 0.47 0.31 0.85 0.85 0.85 1.15 1.15 1.15 - 0.6 0.9 - 0.6 0.9 - 0.6 0.9 1.7 1.7 1.7 1.15 1.15 1.15 2.1 2.1 2.1 V V mA V V V V V V V V V V V V V V V V V V V V V V V V
1389-05.TBL
Pin 32 Output DC voltage is Pin 3 tested when +0.2V is applied to INY and - 0.2V to INX. SW1 Pin 16 (A1-2) = Test value - (A1-1) SW2 Pin 20 (B1-2) = Test value - (B1-1) The difference with the previous pin voltage is Pin 23 recorded. Same for A2-2, Pin 27 B2-2, A3-2, B3-2
Calculation Calculation Calculation Calculation Calculation Calculation V1 + 0.4
Pin 32 Output DC voltage is - 0.9 tested when - 0.4V is Pin 3 applied to INY and + 0.4V 0.6 to INX. Pin 16 (A1-3) = Test value - (A1-1) - 0.9 SW1 SW2 (B1-3) = Test value - (B1-1) Pin 20 The difference with the 0.6 previous pin voltage is Pin 23 recorded. Same for A2-3, - 0.9 B2-3, A3-3, B3-3 Pin 27 0.6 1.3 (V1-2) = (A1-3) + (B1-3) Amplitude calculated from T22 with T27 as base, same for V2-2, V3-2. (A1-3) / (B1-3) (A2-3) / (B2-3) (A3-3) / (B3-3) (V1-2) / (V1-1) (V2-2) / (V1-1) (V3-2) / (V1-1) 1.3 1.3 0.85 0.85 0.85 1.7 1.7 1.7
Calculation Calculation Calculation Calculation Calculation Calculation Calculation Calculation Calculation
4/7
STV1389AQ
TEST CIRCUIT
150 150
24
23 3A
22
21
20 2B
19
18
17 150 16 2A
25
26 150 27 3B -5V
15
14
-5V VEE
28
13
29
12
30 BIAS GEN 1A 32 1B INY A 1 2 3 4 5 6 7 8
11
31 150
10 SW2 9 INX B V INX
150
SW1 V INY
1389-05.EPS
DESCRIPTION OF OPERATION The STV1389AQ consists of 3 differential amplifier with a common input and a bias generator, and three differential outputs. Each amplifiers provides a 6dB gain and is configured as a differential output feeding the bases of a pair of current boosting on-chip emitter follower transistors. The differential input pins are internally biased and the input signal is ac-coupled to remove the D.C. component. Between the output pins of each differential amplifier and the coaxial cable, an R-C network is con-
nected to remove D.C. component from the output and for impedance matching. The series resistor has a value of 68 to 75 to match a 75 coaxial cable. In this manner a signal almost identitical in level to the input signal is transferred to the coaxial cable. Optimum PCB layout and matching resistor value are chosen to obtain good eye pattern design at the input pins. This is necessary because the waveform distortion at the input pins is directly transferred to the output waveform.
DC cut Matching resistor 0.1 F 75
STV1389AQ
Matching resistor Signal source = 0.8Vpp 0.1F DC cut BIAS GEN 0.6V 6dB Differential amplifier 0.1 F 75 To the other 2 channels
1389-06.EPS
0.1F
150 - 5V 0.1F 150
75 75 Co-axial cable
75 1.5V
5/7
6/7
Exampleof output waveform
Same as Block A
STV1389AQ
TEST CIRCUIT
Same as Block A
Signal rate 270Mbps 75 for terminatingpin
24 20 2B 2A 16 18 3A
23 21
22
19
17
25
26 15
-5V
STV1389AQ Top View
3B V = 200mV/div H = 1ns/div 13 0.1 F
12
27 14
-5V
28
29
10 / 16V Tantalum capacitor
Keep unused output pins (both collector an emitter) open. Even when only one output side is in use, connect both the pull-down resistance and the collector.
30 11
31 10 0.1 F *R1 10 1B INX B INY A 1 2 4 3 5 6 7 8 *R3 150
*R2 10
BIAS GEN 9
1A
32
3
STV1601A
4
0.1 F
Serial Encoder 220 -5V 220
F 75 0.1 F 75 0.1
150
-5V
150
0.1 F
The marked * resistor is altered through the PCB pattern. Adjustment is performed to obtain a good eye pattern at Pins 7 and 9. Keep the GND pin pattern as short as possible and provide sufficient GND. A weak GND will cause unstable operation Since power consumptionis large, conceive a pattern takingdueconsideration of the radiationfrom the PCB.
Block A
1389-07.EPS
STV1389AQ
PACKAGE MECHANICAL DATA 32 PINS - PLASTIC QUAD FLAT PACK
Dimensions in mm 9.0 7.0
24 0.2 0.3 0.1 17 0.35 0.15
1.5
0.15
25
16
8.0
0.2 0.1
32
9
0.1
1
0.8
0.3
0.15 0.10
8
0 - 10
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
7/7
PM-QFP32.EPS
0.12
M
0.127
0.1 0.05
0.50

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