TI SN74CBTS16212DGG

SN74CBTS16212
24-BIT FET BUS-EXCHANGE SWITCH
WITH SCHOTTKY DIODE CLAMPING
SCDS036B – DECEMBER 1997 – REVISED MAY 1998
D
D
D
D
D
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
5-Ω Switch Connection Between Two Ports
TTL-Compatible Input Levels
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds 2000 V Per
MIL-STD-833, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Package Options Include Plastic Thin
Shrink Small-Outline (DGG), Thin Very
Small-Outline (DGV), and 300-mil Shrink
Small-Outline (DL) Packages
S0
1A1
1A2
2A1
2A2
3A1
3A2
GND
4A1
4A2
5A1
5A2
6A1
6A2
7A1
7A2
VCC
8A1
GND
8A2
9A1
9A2
10A1
10A2
11A1
11A2
12A1
12A2
description
The SN74CBTS16212 provides 24 bits of
high-speed TTL-compatible bus switching or
exchanging with Schottky diodes on the I/Os to
clamp undershoot. The low on-state resistance of
the switch allows connections to be made with
minimal propagation delay.
The device operates as a 24-bit bus switch or a
12-bit bus exchanger, which provides data
exchanging between the four signal ports via the
data-select (S0–S2) terminals.
The SN74CBTS16212 is characterized for
operation from –40°C to 85°C.
1
56
2
55
3
54
4
53
5
52
6
51
7
50
8
49
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
25
32
26
31
27
30
28
29
S1
S2
1B1
1B2
2B1
2B2
3B1
GND
3B2
4B1
4B2
5B1
5B2
6B1
6B2
7B1
7B2
8B1
GND
8B2
9B1
9B2
10B1
10B2
11B1
11B2
12B1
12B2
FUNCTION TABLE
INPUTS
INPUTS/OUTPUTS
FUNCTION
S2
S1
S0
A1
A2
L
L
L
Z
Z
Disconnect
L
L
H
B1
Z
A1 port = B1 port
L
H
L
B2
Z
A1 port = B2 port
L
H
H
Z
B1
A2 port = B1 port
H
L
L
Z
B2
A2 port = B2 port
H
L
H
Z
Z
Disconnect
H
H
L
B1
B2
A1 port = B1 port
A2 port = B2 port
H
H
H
B2
B1
A1 port = B2 port
A2 port = B1 port
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  1998, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN74CBTS16212
24-BIT FET BUS-EXCHANGE SWITCH
WITH SCHOTTKY DIODE CLAMPING
SCDS036B – DECEMBER 1997 – REVISED MAY 1998
logic diagram (positive logic)
1A1
2
54
3
53
1B2
1A2
12A1
12A2
27
30
28
29
12B1
12B2
1
S0
56
S1
55
S2
2
1B1
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN74CBTS16212
24-BIT FET BUS-EXCHANGE SWITCH
WITH SCHOTTKY DIODE CLAMPING
SCDS036B – DECEMBER 1997 – REVISED MAY 1998
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Continuous channel current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
Package thermal impedance, θJA (see Note 2): DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W
DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°C/W
DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions (see Note 3)
MIN
MAX
5.5
VCC
VIH
Supply voltage
4
High-level control input voltage
2
VIL
TA
Low-level control input voltage
Operating free-air temperature
–40
UNIT
V
V
0.8
V
85
°C
NOTE 3: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
II
IIL
IIH
ICC
∆ICC§
Control inputs
Ci
Control inputs
Cio(OFF)
ron¶
TEST CONDITIONS
TYP†
MAX
UNIT
VCC = 4.5 V,
VCC = 5.5 V,
II = –18 mA
VI = GND
–1.2
V
VCC = 5.5 V,
VCC = 5.5 V,
VI = 5.5 V
IO = 0,
150
VCC = 5.5 V,
VI = 3 V or 0
One input at 3.4 V,
VO = 3 V or 0,
VCC = 4 V,
S0, S1, or S2 = VCC
VCC = 4.5 V
VI = 2.4 V,
VI = 0
MIN
–1
VI = VCC or GND
Other inputs at VCC or GND
II = 15 mA
II = 64 mA
II = 30 mA
II = 15 mA
µA
3
µA
2.5
mA
2.5
pF
10.5
pF
20
4
7
4
7
Ω
VI = 2.4 V,
6
12
‡ All typical values are at VCC = 5 V, TA = 25°C.
§ This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
¶ Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by
the lower of the voltages of the two (A or B) terminals.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SN74CBTS16212
24-BIT FET BUS-EXCHANGE SWITCH
WITH SCHOTTKY DIODE CLAMPING
SCDS036B – DECEMBER 1997 – REVISED MAY 1998
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
VCC = 4 V
VCC = 5 V
± 0.5 V
MIN
MIN
FROM
(INPUT)
TO
(OUTPUT)
tpd†
A or B
B or A
tpd
ten
S
A or B
10
S
A or B
10.4
PARAMETER
MAX
UNIT
MAX
0.35
0.25
ns
1.5
9.1
ns
1.5
9.7
ns
tdis
S
A or B
9.2
1.5
8.8
ns
† The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance, when
driven by an ideal voltage source (zero output impedance).
PARAMETER MEASUREMENT INFORMATION
7V
S1
500 Ω
From Output
Under Test
GND
CL = 50 pF
(see Note A)
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
7V
Open
Open
500 Ω
3V
Output
Control
(low-level
enabling)
LOAD CIRCUIT
1.5 V
0V
tPZL
3V
Input
1.5 V
1.5 V
0V
tPLH
VOH
Output
1.5 V
Output
Waveform 1
S1 at 7 V
(see Note B)
1.5 V
VOL
3.5 V
Output
Waveform 2
S1 at Open
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
tPLZ
1.5 V
tPZH
tPHL
1.5 V
VOL + 0.3 V
VOL
tPHZ
1.5 V
VOH
VOH – 0.3 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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Copyright  1998, Texas Instruments Incorporated