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參數(shù)資料
| 型號： | DS2127+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TERM SCSI LVD/SE 48-LQFP |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 類型： | SCSI，LVD，SE |
| 端子數(shù)： | 14 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 帶卷 (TR) |
DS2127
Ultra3 LVD/SE SCSI 14-Line Terminator
4
_____________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1, 2, 11–24,
37–48
R_ _ P, R_ _ N
Signal Termination. Connect to SCSI bus signal lines. Asserting ISO removes the terminators from the
SCSI bus. R_ _ P pins are the ground line for SE operation and the positive lines in differential mode.
R_ _ N pins are the signal lines in SE operation and the negative lines in differential mode.
3
TPWR
Termination Power. Connect to the SCSI TERMPWR line and decouple with a ceramic
2.2F capacitor.
4–9, 28–33
HS_GND
Heat-Sink Ground. Internally connected to the mounting pad. These pins must be connected to
ground. These pins should be connected to a ground plane with the layout optimized for
heat transfer.
10
VREF
Regulator Output Voltage. This must be decoupled with a 4.7F capacitor. Asserting ISO floats this
output. A high-frequency capacitor (0.1F) should also be placed on the VREF pin in applications that
use fast rise/fall-time drivers.
25
GND
Signal Ground
26
SE
SE Mode Indicator. A high state indicates SE mode detected on SCSI bus.
27
LVD
LVD Mode Indicator. A high state indicates LVD mode detected on SCSI.
34
DIFF_CAP
DIFFSENSE Capacitor. Connect a 0.1F capacitor for the DIFFSENSE filter. Input to detect the type of
device (differential or single-ended) on the SCSI bus.
35
DIFFSENS
DIFFSENSE. Output to drive the SCSI bus DIFFSENS line.
36
ISO
Isolation Input. When pulled high, terminating resistors and biasing current sources are removed from
the SCSI bus. When not connected to ground, the pin has a 10A current source pulling the pin to the
high state.
2.15V
0.6V
THERMAL
SHUTDOWN
1.30V
DIFF_CAP
ISO
2.15V
1.30V
1.25V
(LVD)
R1N
R1P
R14N
R14P
VREF
0.6V
DIFFSENS
2.85V
(SE)
LVD
SE
HVD
LVD SE HVD
LVD
SE
LVD
SE
CONTROL LOGIC
DELAY/
FILTER
BANDGAP
REFGEN AND
TRIM
10
A
52
52
52
52
110
110
124
124
SE
ALL SWITCHES UP
HVD/ISO
ALL SWITCHES CENTER
LVD
ALL SWITCHES DOWN
DS2127
Figure 1. Block Diagram
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| DS2129 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:LVD SCSI 27-Line Regulator |
| DS2129S | 功能描述:SCSI 接口集成電路 RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| DS2129S/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:LVD SCSI 27-Line Regulator |
| DS2129S/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:LVD SCSI 27-Line Regulator |
| DS2129S/T&R | 功能描述:SCSI 接口集成電路 RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
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