UCC5696 Datasheet, PDF (1/12 Pages) Texas Instruments – 27 LINE LVD ONLY SCSI TERMINATOR FOR SPI-5

UCC5696
SLVS406B – JUNE 2002 – REVISED JUNE 2003
27ĆLINE LVD ONLY SCSI TERMINATOR FOR SPIĆ5
FEATURES
D Meets Ultra2 (SPI-2 LVD SCSI), Ultra3, Ultra
160 (SPI-3), Ultra320 (SPI-4), and Ultra640
(SPI-5) Standards
D 2.7-V to 5.25-V Termpwr Operation
D Differential Fail-Safe Bias
D I²C Bus Adjustable Impedance and
Differential Bias Current
D 80-Pin Low Profile Quad Flat Pack Package
(QFP)
DESCRIPTION
The UCC5696 is a 27-line LVD only SCSI
programmable terminator. The nominal settings
on power up are compliant to SPI-2 through SPI-4.
The programmable settings are used for SPI-5.
The UCC5696 uses the I²C to program the
differential impedance and the differential bias
current. The differential impedance is
programmed in 5-Ω increments from 55 Ω to
130 Ω using 4 bits (16 steps). The differential bias
current is programmed in 50 µA from 0.7 mA to
1.45 mA using 4 bits (16 steps). The UCC5696
has the SPI-3 mode change delay, the typical
value is 200 ms.
APPLICATION DIAGRAM
Termpower
UCC5696
8 PVDD
L1+ 1
L1– 2
7 TERMPWR
4.7 µ F
L9+ 30
L9– 29
1
L1+
UCC5696
PVDD
8
2 L1–
CONTROL LINES (9)
TERMPWR 7
30 L9+
29 L9–
Termpower
4.7µ F
I2 CBUS
50 ICBD
51 ICBC
DIFSENS 15
DIFFB 16
49 ICAD0
I2 C Address
L10+ 32
L10– 31
43 ICAD6
L18+ 61
52 ^DISCNCT
L18– 62
L19+ 63
L19– 64
10 REG
4.7µ _F
L27+ 79
GND ^{L27– 80}
54
20 kΩ
0.1 µF
15 DIFSENS _{ICBD 50}
20 kΩ
16 DIFFB
0.1 µF
ICBC 51
I2 CBUS
DATA (9)
LOW BYTE 0–7
+ PARITY LINES
DATA (9)
HIGH BYTE 8–15
+ PARITY LINES
32 L10+
31 L10–
ICAD0 49
I2 C Address
61 L18+
62 L18–
63 L19+
64 L19–
ICAD6 43
DISCNCT 52
REG 10
79 L27+
80 L27– _GND
54
4.7 µ F
UDG–01093
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.
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Copyright  2002, Texas Instruments Incorporated
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