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參數(shù)資料
| 型號： | 74VCX162839MTD |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | Low Voltage 20-Bit Selectable Register/Buffer with 3.6V Tolerant Inputs and Outputs and 26ヘ Series Resistors in the Outputs |
| 中文描述： | ALVC/VCX/A SERIES, 20-BIT DRIVER, TRUE OUTPUT, PDSO56 |
| 封裝： | 6.10 MM, MO-153, TSSOP-56 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大小： | 61K |
| 代理商： | 74VCX162839MTD |
1999 Fairchild Semiconductor Corporation
DS500127
www.fairchildsemi.com
March 1998
Revised July 1999
7
S
74VCX162839
Low Voltage 20-Bit Selectable Register/Buffer with
3.6V Tolerant Inputs and Outputs
and 26
Series Resistors in the Outputs
General Description
The VCX162839 contains twenty non-inverting selectable
buffered or registered paths. The device can be configured
to operate in a registered, or flow through buffer mode by
utilizing the register enable (REGE) and Clock (CP) sig-
nals. The device operates in a 20-bit word wide mode. All
outputs can be placed into 3-STATE through use of the OE
pin. These devices are ideally suited for buffered or regis-
tered 168 pin and 200 pin SDRAM DIMM memory mod-
ules.
The 74VCX162839 is designed for low voltage (1.65V to
3.6V) V
CC
applications with I/O compatibility up to 3.6V.
The 74VCX162839 is also designed with 26
series resis-
tors in the outputs. This design reduces line noise in appli-
cations such as memory address drivers, clock drivers, and
bus transceivers/transmitters.
The 74VCX162839 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
I
Compatible with PC100 and PC133 DIMM module
specifications
I
1.65V–3.6V V
CC
supply operation
I
3.6V tolerant inputs and outputs
I
26
series resistors in the outputs
I
t
PD
(CP to O
n
)
4.1 ns max for 3.0V to 3.6V V
CC
5.8 ns max for 2.3V to 2.7V V
CC
9.8 ns max for 1.65V to 1.95V V
CC
I
Power-off high impedance inputs and outputs
I
Supports live insertion and withdrawal (Note 1)
I
Static Drive (I
OH
/I
OL
)
±
12 mA @ 3.0V V
CC
±
8 mA @ 2.3V V
CC
±
3 mA @ 1.65V V
CC
I
Uses patented noise/EMI reduction circuitry
I
Latch-up performance exceeds 300 mA
I
ESD performance:
Human body model
>
2000V
Machine model
>
200V
Note 1:
To ensure the high-impedance state during power up or power
down, OE should be tied to V
CC
through a pull-up resistor; the minimum
value of the resistor is determined by the current-sourcing capability of the
driver.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Order Number
74VCX162839MTD
Package Number
MTD56
Package Description
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Names
Description
OE
Output Enable Input (Active LOW)
I
0
–I
19
O
0
–O
19
CP
Inputs
Outputs
Clock Pulse Input
REGE
Register Enable Input
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