SN74CBTH16211
24-BIT FET BUS SWITCH
WITH BUS HOLD
SCDS062C – JUNE 1998 – REVISED NOVEMBER 2001
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
5-Ω Switch Connection Between Two Ports
TTL-Compatible Input Levels
Bus Hold on Data Inputs/Outputs
Eliminates the Need for External
Pullup/Pulldown Resistors
NC
1A1
1A2
1A3
1A4
1A5
1A6
GND
1A7
1A8
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
1B11
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
2
3
4
description
5
6
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.
7
8
9
10
11
12
13
14
1A9
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.
1A10
1A11
1A12
2A1 15
2A2
42 1B12
2B1
2B2
16
17
41
40
V
CC
2A3 18
GND 19
2A4 20
2A5 21
2A6 22
2A7 23
2A8 24
2A9 25
2A10 26
2A11 27
2A12 28
39 2B3
38 GND
37 2B4
36 2B5
35 2B6
34 2B7
33 2B8
32 2B9
31 2B10
30 2B11
29 2B12
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
through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
CC
NC – No internal connection
ORDERING INFORMATION
ORDERABLE
TOP-SIDE
MARKING
†
PACKAGE
T
A
PART NUMBER
SN74CBTH16211DL
SN74CBTH16211DLR
SN74CBTH16211DGGR
SN74CBTH16211DGVR
Tube
SSOP – DL
CBTH16211
Tape and reel
Tape and reel
Tape and reel
–40°C to 85°C
TSSOP – DGG
TVSOP – DGV
CBTH16211
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.
Copyright 2001, Texas Instruments Incorporated
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265