SN74CBTLV16800 Datasheet, PDF (1/6 Pages) Texas Instruments – LOW-VOLTAGE 20-BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS

SN74CBTLV16800
LOW-VOLTAGE 20-BIT FET BUS SWITCH
WITH PRECHARGED OUTPUTS
SCDS045F – DECEMBER 1997 – REVISED MAY 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
(TOP VIEW)
BIASV ₁
1A1 ₂
1A2 ₃
1A3 ₄
1A4 5
1A5 6
1A6 7
GND 8
1A7 9
1A8 10
1A9 11
1A10 12
2A1 13
2A2 14
V_CC 15
2A3 16
GND 17
2A4 18
2A5 19
2A6 20
2A7 21
2A8 22
2A9 23
2A10 24
48 ^1OE
47 ^2OE
46 ^1B1
45 ^1B2
44 ^1B3
43 1B4
42 1B5
41 GND
40 1B6
39 1B7
38 1B8
37 1B9
36 1B10
35 2B1
34 2B2
33 2B3
32 GND
31 2B4
30 2B5
29 2B6
28 2B7
27 2B8
26 2B9
25 2B10
The device is organized as dual 10-bit bus switches with separate output-enable (OE) inputs. It can be used
as two 10-bit bus switches or one 20-bit bus switch. When OE is low, the associated 10-bit bus switch is on,
and port A is connected to port B. When OE is high, the switch is open, the high-impedance state exists between
the two ports, and port B is precharged to BIASV through the equivalent of a 10-kΩ resistor.
To ensure the high-impedance state during power up or power down, OE should be tied to V_CC 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
FUNCTION
L
A port = B port
H
A port = Z
B port = BIASV
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 © 1999, Texas Instruments Incorporated
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