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Teilenummer | CBT3244A |
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Beschreibung | Octal bus switch | |
Hersteller | NXP Semiconductors | |
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Gesamt 18 Seiten CBT3244A
Octal bus switch with quad output enables
Rev. 02 — 15 September 2005
Product data sheet
1. General description
The CBT3244A provides eight bits of high-speed TTL-compatible bus switching in a
standard '244 device pinout. The low ON-state resistance of the switch allows connections
to be made with minimal propagation delay.
The CBT3244A device is organized as two 4-bit low-impedance switches with separate
output-enable (OE) inputs. When OE is LOW, the switch is on and data can flow from
port A to port B, or vice versa. When OE is HIGH, the switch is open and high-impedance
state exists between the two ports.
The CBT3244A is characterized for operation from −40 °C to +85 °C.
2. Features
s Standard '244-type pinout
s 5 Ω switch connection between two ports
s TTL compatible control input levels
s Package options include:
x plastic small outline (SO20)
x shrink small outline (SSOP20)
x shrink small outline, QSOP (SSOP20)
x thin shrink small outline (TSSOP20)
x depopulated heatsink very thin quad flat package, no leads (DHVQFN20)
s Latch-up protection exceeds 500 mA per JESD78
s ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115 and 1000 V CDM per JESD22-C101
Philips Semiconductors
CBT3244A
Octal bus switch with quad output enables
9. Static characteristics
Table 6: Static characteristics
Tamb = −40 °C to +85 °C
Symbol Parameter
VIK input clamping voltage
ILI input leakage current
ICC quiescent supply current
∆ICC [2]
Ci
Cio
Ron [3]
additional quiescent supply current
(per input)
input capacitance (control pins)
input/output capacitance
ON-state resistance
Conditions
VCC = 4.5 V; II = −18 mA
VCC = 5.5 V; VI = GND or 5.5 V
VCC = 5.5 V; IO = 0 mA;
VI = VCC or GND
VCC = 5.5 V; one input at 3.4 V,
other inputs at VCC or GND
VI = 3 V or 0 V; nOE = VCC
nOE = VCC = 5.0 V
VCC = 4.5 V; VI = 0 V; II = 64 mA
VCC = 4.5 V; VI = 0 V; II = 30 mA
VCC = 4.5 V; VI = 2.4 V; II = 15 mA
Min Typ [1] Max Unit
- - −1.2 V
- - ±1 µA
- 1 3 µA
- - 2.5 mA
- 3 - pF
- 3 - pF
- 47Ω
- 47Ω
- 8 15 Ω
[1] All typical values are at VCC = 5 V; Tamb = 25 °C.
[2] This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
[3] Measured by the voltage drop between the A and the B terminals at the indicated current through the switch. ON-state resistance is
determined by the lowest voltage of the two (A or B) terminals.
10. Dynamic characteristics
Table 7: Dynamic characteristics
Tamb = −40 °C to +85 °C; VCC = 5.0 V ± 0.5 V; GND = 0 V; CL = 50 pF; unless otherwise specified.
Symbol Parameter
Conditions
Min Typ
tPD
propagation delay [1]
from nAn input to nBn output, or
from nBn input to nAn output
--
ten enable time [2]
from nOE input to nAn or nBn output
1.0
-
tdis disable time [3]
from nOE input to nAn or nBn output
1.0
-
Max
0.25
5.6
6.0
Unit
ns
ns
ns
[1] This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical ON-state
resistance of the switch and a load capacitance of 50 pF, when driven by an ideal voltage source (zero output impedance).
[2] Output enable time to HIGH and LOW level.
[3] Output disable time from HIGH and LOW level.
9397 750 13362
Product data sheet
Rev. 02 — 15 September 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
6 of 18
6 Page Philips Semiconductors
CBT3244A
Octal bus switch with quad output enables
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
D
y
Z
20
c
11
EA
X
HE v M A
pin 1 index
1
e
10
wM
bp
A2
A1
Q
(A3)
A
Lp
L
detail X
θ
0 2.5 5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c D(1) E(1) e HE L Lp Q
v
w
y Z (1) θ
mm
2
0.21
0.05
1.80
1.65
0.25
0.38
0.25
0.20
0.09
7.4
7.0
5.4
5.2
0.65
7.9
7.6
1.25
1.03
0.63
0.9
0.7
0.2 0.13 0.1
0.9
0.5
8o
0o
Note
1. Plastic or metal protrusions of 0.2 mm maximum per side are not included.
OUTLINE
VERSION
SOT339-1
IEC
REFERENCES
JEDEC
JEITA
MO-150
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
Fig 13. Package outline SOT339-1 (SSOP20)
9397 750 13362
Product data sheet
Rev. 02 — 15 September 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
12 of 18
12 Page | ||
Seiten | Gesamt 18 Seiten | |
PDF Download | [ CBT3244A Schematic.PDF ] |
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