SN74CBTK16245
16-BIT FET BUS SWITCH
WITH ACTIVE-CLAMP UNDERSHOOT-PROTECTION CIRCUIT
SCDS105D – APRIL 2000 – REVISED NOVEMBER 2001
DGG, DGV, OR DL PACKAGE
Member of the Texas Instruments
Widebus Family
(TOP VIEW)
Standard ’16245-Type Pinout
5-Ω Switch Connection Between Two Ports
TTL-Compatible Input Levels
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
NC
1B1
1B2
GND
1B3
1B4
1OE
1A1
1A2
GND
1A3
1A4
2
3
4
I
Supports Partial-Power-Down Mode
off
5
Operation
6
Active-Clamp Undershoot-Protection
Circuit on the I/Os Clamps Undershoots up
to –2 V
7
V
V
CC
CC
8
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
9
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
description
V
V
The SN74CBTK16245 device provides 16 bits of
high-speed TTL-compatible bus switching in a
standard ’16245 device pinout. The low on-state
resistance of the switch allows connections to be
made with minimal propagation delay.
CC
CC
2B5
2B6
GND
2B7
2B8
NC
2A5
2A6
GND
2A7
2A8
2OE
The A and B ports have an active-clamp
undershoot-protection circuit. When there is an
undershoot, the active-clamp circuit is enabled,
NC – No internal connection
and current from V
is supplied to clamp the
CC
output, preventing the pass transistor from
turning on.
The device is organized as two 8-bit low-impedance switches with separate output-enable (OE) inputs. When OE is
low, the switch is on, and data can flow from the A port to the B port, or vice versa. When OE is high, the switch
is open, and the high-impedance state exists between the two ports.
This device is fully specified for partial-power-down applications using I . The I circuitry disables the outputs,
off
off
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
Tube
SN74CBTK16245DL
SSOP – DL
CBTK16245
Tape and reel
SN74CBTK16245DLR
SN74CBTK16245DGGR
SN74CBTK16245DGVR
–40°C to 85°C
TSSOP – DGG Tape and reel
TVSOP – DGV Tape and reel
CBTK16245
CP245
†
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.
Widebus is a trademark of Texas Instruments.
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