Texas Instruments SN74CBTLV16800GR, SN74CBTLV16800VR, SN74CBTLV16800DL, SN74CBTLV16800DLR Datasheet
SN74CBTLV16800
LOW-VOLTAGE 20-BIT FET BUS SWITCH
WITH PRECHARGED OUTPUTS
SCDS045F – DECEMBER 1997 – REVISED MA Y 1999
D
5-Ω Switch Connection Between Two Ports
D
Isolation Under Power-Off Conditions
D
B-Port Outputs Are Precharged by Bias
Voltage to Minimize Signal Distortion
During Live Insertion
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D
Package Options Include Plastic Thin
Shrink Small-Outline (DGG), Thin Very
Small-Outline (DGV), and 300-mil Shrink
Small-Outline (DL) Packages
NOTE: For tape and reel order entry:
The DGGR package is abbreviated to GR, and
the DGVR package is abbreviated to VR.
description
The SN74CBTLV16800 provides 20 bits of
high-speed bus switching. The low on-state
resistance of the switch allows connections to be
made with minimal propagation delay . The device
also precharges the B port to a user-selectable
bias voltage (BIASV) to minimize live-insertion
noise.
DGG, DGV, OR DL PACKAGE
BIASV
1A1
1A2
1A3
1A4
1A5
1A6
GND
1A7
1A8
1A9
1A10
2A1
2A2
V
CC
2A3
GND
2A4
2A5
2A6
2A7
2A8
2A9
2A10
(TOP VIEW)
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
2B1
2B2
2B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
The device is organized as dual 10-bit bus switches with separate output-enable (OE
as two 10-bit bus switches or one 20-bit bus switch. When OE
and port A is connected to port B. When OE
is high, the switch is open, the high-impedance state exists between
is low, the associated 10-bit bus switch is on,
) inputs. It can be used
the two ports, and port B is precharged to BIASV through the equivalent of a 10-kΩ resistor.
T o ensure the high-impedance state during power up or power down, OE
should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN74CBTLV16800 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 10-bit bus switch)
INPUT
OE
L A port = B port
H
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.
FUNCTION
A port = Z
B port = BIASV
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1999, Texas Instruments Incorporated
1
SN74CBTLV16800
LOW-VOLTAGE 20-BIT FET BUS SWITCH
WITH PRECHARGED OUTPUTS
SCDS045F – DECEMBER 1997 – REVISED MA Y 1999
logic diagram (positive logic)
1A1
2
SW
46
1
BIASV
1B1
12
1A10
48
1OE
13
2A1
24
2A10
47
2OE
simplified schematic, each FET switch
SW
SW
SW
36
1B10
35
2B1
25
2B10
A
(OE)
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
B
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