SN74CBTH16211 Datasheet, PDF (1/9 Pages) Texas Instruments – 24-BIT FET BUS SWITCH WITH BUS HOLD

D 5-Ω Switch Connection Between Two Ports
D TTL-Compatible Input Levels
D Bus Hold on Data Inputs/Outputs
Eliminates the Need for External
Pullup/Pulldown Resistors
description
The SN74CBTH16211 provides 24 bits of
high-speed TTL-compatible bus switching. The
low on-state resistance of the switch allows
connections to be made with minimal propagation
delay.
The device is organized as dual 12-bit bus
switches with separate output-enable (OE)
inputs. It can be used as two 12-bit bus switches
or one 24-bit bus switch. When OE is low, the
associated 12-bit bus switch is on, and the A port
is connected to the B port. When OE is high, the
switch is open, and a high-impedance state exists
between the two ports.
Active bus-hold circuitry is provided to hold
unused or floating A and B ports at a valid logic
level.
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.
SN74CBTH16211
24-BIT FET BUS SWITCH
WITH BUS HOLD
SCDS062C – JUNE 1998 – REVISED NOVEMBER 2001
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
NC 1
1A1 2
1A2 3
1A3 4
1A4 5
1A5 6
1A6 7
GND 8
1A7 9
1A8 10
1A9 11
1A10 12
1A11 13
1A12 14
2A1 15
2A2 16
V_CC 17
2A3 18
GND 19
2A4 20
2A5 21
2A6 22
2A7 23
2A8 24
2A9 25
2A10 26
2A11 27
2A12 28
56 1OE
55 2OE
54 1B1
53 1B2
52 1B3
51 1B4
50 1B5
49 GND
48 1B6
47 1B7
46 1B8
45 1B9
44 1B10
43 1B11
42 1B12
41 2B1
40 2B2
39 2B3
38 GND
37 2B4
36 2B5
35 2B6
34 2B7
33 2B8
32 2B9
31 2B10
30 2B11
29 2B12
NC – No internal connection
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 85°C
SSOP – DL
TSSOP – DGG
Tube
Tape and reel
Tape and reel
SN74CBTH16211DL
SN74CBTH16211DLR
SN74CBTH16211DGGR
CBTH16211
CBTH16211
TVSOP – DGV Tape and reel SN74CBTH16211DGVR
CYH211
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines}
are available at www.ti.com/sc/package.
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  2001, Texas Instruments Incorporated
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