DS3884AVF NSC [National Semiconductor], DS3884AVF Datasheet - Page 6

• Manufacturer Part Number: DS3884AVF
• Description: BTL Handshake Transceiver
• Manufacturer: NSC [National Semiconductor]

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Pin Descriptions
X: High or low logic state
L: Low state
H: High state
L-H: Low to high transition
Glitch Filter Table
Application Information
The DS3884A is pin to pin and functionally compatible with
the DS3884. The DS3884A is a speed and power enhanced
version of the DS3884. There are two minor differences be-
tween the DS3884 and DS3884A.
The external resistor used in the DS3884A is different from
that used in the DS3884. REXT for the DS3884 is 6.2k while
DE
H
H
L
L
PS1
FIGURE 1. Driver Propagation Delay Set-Up
H
H
*
L
L
FIGURE 2. Driver: Dn to Bn
Dn
H
X
X
L
PS2
H
H
L
L
FRn
(Continued)
H
H
L
L
Filter Setting
DS011460-5
Rn
H
H
L
L
10 ns
24 ns
14 ns
5 ns
FIGURE 7. Receiver: PSn to Bn
DS011460-6
Bn
H
H
L
L
6
REXT for the DS3884A is 13k. The available filter settings for
the DS3884A are 5 ns, 10 ns, 14 ns, 24 ns, while the settings
for the DS3884 are 5 ns, 7.5 ns, 15 ns, and 25 ns.
Utilization of the DS3884A simplifies the implementation of
all handshake signals which require Wired-OR glitch filtering.
Three of the six bits have an additional parallel Wired-OR fil-
tered receive output giving a total of nine receiver outputs.
S1
FIGURE 4. Receiver Propagation Delay Set-Up
FIGURE 5. Receiver: Bn to FRn, Bn to Rn
FIGURE 6. Receiver: t
Switch Position
open
t
PLH
FIGURE 3. Driver: DE
DS011460-11
close
t
PHL
GR
, FRn(min) = 2V
*
to Bn
DS011460-8
DS011460-7
DS011460-10
DS011460-9