UCC5647 [TI]
27-LINE 3-V - 5-V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3, ULTRA160 AND ULTRA320;
| 型号： | UCC5647 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 27-LINE 3-V - 5-V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3, ULTRA160 AND ULTRA320 |
| 文件： | 总7页 (文件大小：125K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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ꢇ ꢆ ꢈꢉ ꢊꢋꢌ ꢍ ꢎꢏ ꢈ ꢂ ꢎꢏ ꢉ ꢏ ꢐ ꢑ ꢌꢒ ꢓꢊ ꢋ ꢔꢑꢕ ꢒ
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ꢚ
SLUS386B − FEBRUARY 2000 − REVISED APRIL 2001
PM PACKAGE
(TOP VIEW)
D
SCSI SPI-2, SPI-3, SPI-4,
Ultra160, Ultra320 Compliance
D
D
Smallest Footprint
Lowest Channel
Capacitance, 2 pF
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
L25−
L25+
{DISCNCT1
{DISCNCT2
L21−
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
D
Less than 0.5-pF Capacitance
Differential Between Pairs
L26−
L26+
L21+
D
D
D
2.7 V to 5.25 V Operation
Differential Failsafe Bias
L27−
L20−
L27+
L20+
64-Pin Low Profile QFP
STRMPWR
PTRMPWR
REG
L19−
L19+
DIFSENS
SGND
39 DIFFB
38 L18−
37 L18+
10
PGND 11
LVD 12
36
35
34
33
L10− 13
L17−
L17+
L16−
L16+
14
15
16
L10+
L11−
L11+
171819 20 21 22 23 24 25 26 27 28 29 30 31 32
{For the UCC5647, Pin 47 is DISCNCT1 and Pin 48 is DISCNCT2.
description
The UCC5646 is a twenty-seven line active terminator for low-voltage-differential (LVD) SCSI networks. This
LVD SCSI-only design allows the user to reach peak bus performance, while reducing system cost. The device
is designed as an active Y-terminator to improve the frequency response of the LVD SCSI Bus. Designed with
a 2-pF (typical) channel capacitance, the UCC5646 allows for minimal bus loading for a maximum number of
peripherals. With the UCC5646, the designer is able to comply with the Ultra2, Ultra3, Ultra160 and Ultra320
specifications. The UCC5646 also provides a much-needed system migration path for the ever improving SCSI
system standards.
This device is available in the 64-pin low-profile QFP package for ease of layout use.
Single-ended (SE) and high-voltage differential (HVD) SCSI drivers are not supported.
AVAILABLE OPTIONS
†
PACKAGED DEVICES
DISCONNECT
STATUS
T
A
LOW PROFILE QFP
(PM)
REGULAR
REVERSE
UCC5646PM
UCC5647PM
0°C to 70°C
†
The PM package is available taped and reeled. Add TR suffix to
device type (e.g. UCC5646PMTR) to order quantities of 1000
devices per reel.
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.
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Copyright 2001, Texas Instruments Incorporated
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁꢁꢂ ꢃ ꢄ ꢃ ꢅ ꢀ ꢁꢁ ꢂ ꢃꢄ ꢆ
ꢇꢆ ꢈꢉ ꢊ ꢋꢌ ꢍ ꢎꢏ ꢈ ꢂꢎꢏ ꢉ ꢏ ꢐ ꢑꢌ ꢒ ꢓꢊ ꢋꢔꢑꢕ ꢒ
ꢖ ꢕꢒ ꢗꢊ ꢐ ꢌ ꢀ ꢉꢑ ꢒꢔ ꢇ ꢅ ꢀꢉꢑꢒ ꢔꢍ ꢅ ꢀꢉꢑꢒ ꢔꢘ ꢃ ꢙ ꢔꢋꢐ ꢀꢉꢑ ꢒꢔꢍ ꢇ ꢙ
ꢚ
SLUS386B − FEBRUARY 2000 − REVISED APRIL 2001
block diagram
DIFSENS
40
≤
≤
−5mA
−15mA
I
SOURCE
µ
50 A
≤
≤
µ
I
200 A
SINK
*FOR THE UCC5647 PIN 47 IS DISCNCT1 AND PIN 48 IS DISCNCT2.
REF 1.3V
1.3V +/− 0.1V
2.15 V
HPD
+
+
DIFFB 39
12
LVD
STRMPWR
PTRMPWR
7
8
0.6V
SE
125
REF
1.25V
52
52
−
+
22 L1−
21 L1+
+56mV
SOURCE/SINK
REGULATOR
+
−
*DISCNCT1 48
L10
L27
+56mV
MODE ALL SWITCHES
125
52
52
SE
LVD
HVD
OPEN
DOWN
OPEN
OPEN
−
+
5
6
L27−
L27+
+56mV
DISCNCT
+
−
*DISCNCT2 47
L1
L9
+56mV
10
11
9
SGND
PGND
REG
†‡
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Input voltage V (STRMPWR, PTRMPWR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
IN
Signal line input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 5 V
Regulator output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.75 A
Storage temperature range, T
Operating virtual junction temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C
Lead temperature (soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C
stg
J
†
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals. Consult
Packaging Section of the Databook for thermal limitations and considerations of packages. All voltages are referenced to GND.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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ꢚ
SLUS386B − FEBRUARY 2000 − REVISED APRIL 2001
electrical characteristics over recommended operating free-air temperature range,
xTRMPWR = 2.7 V to 5.25 V, T = 0_C to 70_C, DISCNCT1 = DISCNCT2 = 0 V for UCC5646,
A
DISCNCT1 = DISCNCT2 = open for UCC5647, T = T , (unless otherwise noted)
A
J
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
xTRMPWR Supply Current Section
LVD mode
Disabled terminator
65
mA
xTRMPWR supply current
500
µA
1.25 V Regulator Section
1.25 V regulator
0.5 V ≤ V
CM
≤ 2.0 V,
See Note 1
1.15
240
1.25
–300
300
1.35
V
Regulator source current
Regulator sink current
1.3 V (DIFSENS) Regulator Section
1.3 V regulator
V
= 0 V
–240
mA
mA
REG
REG
V
= 3.0 V
–5mA ≤ I
DIFSENS
≤ 50 µA
1.2
–5
50
1.3
–8
1.4
–15
200
V
Short-circuit source current
Short-circuit sinkcurrent
V
= 0 V
mA
µA
DIFSENS
DIFSENS
V
= 2.75 V
Differential Termination Section (Applies to each line pair 1−27)
Differential bias voltage
100
100
1.15
110
125
110
mV
Ω
Differential impedance
105
1.25
140
Common-mode bias voltage
Common-mode impedance
Disconnected Termination Section
Output leakage current
L+ and L– shorted together
1.35
165
V
L+ and L– shorted together, See Note 2
Ω
10
400
3
nA
pF
Output capacitance
SE measurement to GND,
See Note 3
Disconnect Control (DISCNCT1) or (DISNCNT2) and DIFFB Input Section
DISCNCT threshold voltage
0.8
–30
0.5
1.5
2.0
–10
0.7
2.4
10
V
µA
V
DISCNCT input current
V
= 0 V and 2.0 V
DISCNCT
DIFFB SE to LVD threshold voltage
DIFFB LVD to HPD threshold voltage
DIFFB Input current
1.9
V
0 V ≤ V
DIFFB
≤ 2.75 V,
–10
µA
Low-Voltage Differential (LVD) Status Bit Section
Source current
V
V
= 2.4 V
= 0.4 V
−6
5
−4
mA
mA
LOAD
Sink current
2
LOAD
Thermal Shutdown Section
Thermal shutdown threshold
Thermal shutdown hysteresis
For increasing temperature
140
155
10
170
_C
_C
NOTE 1: VCM is applied to all L+ and L− lines simultaneously.
2.0 V * 0.5 V
NOTE 2:
Z
, V
CM(max)
= 2.0 V, V = 0.5 V
CM(min)
+ ƪI
ƫ
CM
* I
VCM (max)
VCM (max)
NOTE 3: Ensured by design, not production tested.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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ꢚ
SLUS386B − FEBRUARY 2000 − REVISED APRIL 2001
pin descriptions
STRMPWR: 2.7 V to 5.25 V power supply for all circuitry except the 1.25-V regulator.
SGND: Ground reference for all circuitry except the 1.25-V regulator.
PTRMPWR: 2.7 V to 5.25 V power supply for the 1.25-V regulator.
PGND: Ground reference for the 1.25-V regulator.
REG: Output of the internal 1.25-V regulator; must be connected to a 4.7-µF bypass capacitor and a
high-frequency, low-ESR 0.01-µF capacitor to GND.
DIFSENS: Drives the SCSI bus DIFF SENSE line to 1.3 V to detect what types of devices are tied to the bus.
DIFFB: DIFF SENSE input pin. Connect through a 20-kΩ resistor to DIFSENS and through a 0.1-µF capacitor
to GND. Input to comparators that detect what type of drives are connected to the SCSI bus.
DISCNCT1: Disconnect one controls termination lines 10−27 (control and low byte).
DISCNCT2: Disconnect two controls termination lines 1−9 (high byte).
LVD: TTL compatible status bit indicating when low-voltage-differential voltage is present on DIFFB.
L1− thru L27−: Negative lines for the SCSI bus.
L1+ thru L27+: Positive lines for the SCSI bus.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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ꢚ
SLUS386B − FEBRUARY 2000 − REVISED APRIL 2001
UCC5646
UCC5646
L1+ 21
L1− 22
21 L1+
22 L1−
Termpower
Termpower
7
8
STRMPWR
PTRMPWR
STRMPWR
PTRMPWR
7
8
CONTROL LINES (9)
L9+ 60
L9− 59
60 L9+
59 L9−
0.01
F
µ
4.7
F
4.7 µ F
µ
0.01 µF
12 LVD
L10+ 14
L10− 13
14 L10+
13 L10−
DATA (8)
+ PARITY LINES
48
48
DISCNCT1
DISCNCT1
CONTROL AND
LOW BYTE
CONTROL AND
LOW BYTE
L18+ 37
L18− 38
37 L18+
38 L18−
L19+ 41
L19− 42
41 L19+
42 L19−
DISCNCT2
HIGH SIDE
DATA (8)
+ PARITY LINES
47
47
DISCNCT2
HIGH SIDE
L27+
6
6
5
L27+
L27−
11 PGND
10 SGND
L27− 5
PGND 11
SGND 10
DIFSENS 40
DIFFB
40 DIFSENS
DIFFB
REG
9
REG
9
39
39
50 kΩ
4.7 µF
50 kΩ
4.7
F
4.7 µF
4.7 µF
µ
0.01 µF
0.01 F
µ
UDG−98202
Figure 1. Typical Application Diagram
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
6
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相关型号：
UCC5670FQP
9-Line Multimode SCSI Terminator with SPI-3 Mode Delay, Disconnect, And Status Lines 48-LQFP 0 to 70
TI
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