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參數資料
| 型號： | 74F8961 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Octal latched bidirectional Futurebus transceivers 3-State open-collector |
| 中文描述： | 八進制鎖存雙向Futurebus收發器三態開路集電極 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 194K |
| 代理商： | 74F8961 |
Philips Semiconductors FAST Products
Product specification
74F8960/74F8961
Octal latched bidirectional Futurebus transceivers
(3-State + open-collector)
1
December 19, 1990
853-1120 01322
FEATURES
Octal latched transceiver
Drives heavily loaded backplanes with
equivalent load impedances down to 10
High drive (100mA) open collector drivers
on B port
Reduced voltage swing (1 volt) produces
less noise and reduces power consumption
High speed operation enhances
performance of backplane buses and
facilitates incident wave switching
Compatible with IEEE futurebus standards
Built-in precision band-gap reference
provides accurate receiver thresholds and
improved noise immunity
Controlled output ramp and multiple GND
pins minimize ground bounce
Glitch-free power up/down operation
DESCRIPTION
The 74F8960 and 74F8961 are octal
bidirectional latched transceivers and are
intended to provide the electrical interface to
a high performance wired–OR bus. The B
port inverting drivers are low–capacitance
open collector with controlled ramp and are
designed to sink 100mA from 2 volts. The B
port inverting receivers have a 100 mV
threshold region and a 4ns glitch filter.
The B port interfaces to ‘Backplane
Transceiver Logic’ (BTL). BTL features a
reduced (1V to 2V) voltage swing for lower
power consumption and a series diode on
the drivers to reduce capacitive loading.
Incident switching is employed, therefore BTL
propagation delays are short. Although the
voltage swing is much less for BTL, so is its
receiver threshold region, therefore noise
margins are excellent.
BTL offers low power consumption, low
ground bounce, EMI and crosstalk, low
capacitive loading, superior noise margin and
low propagation delays. This results in a high
bandwidth, reliable backplane.
The 74F8960 and 74F8961 A ports have TTL
3–state drivers and TTL receivers with a latch
function. A separate High–level control input
(VX) is provided to limit the A side output
level to a given voltage level (such as 3.3V).
For 5.0V systems, VX is simply tied to VCC.
The 74F8961 is the non–inverting version of
74F8960.
TYPE
TYPICAL PROPAGATION DELAY
TYPICAL SUPPLY CURRENT( TOTAL)
74F8960
6.5ns
80mA
74F8961
6.5ns
80mA
ORDERING INFORMATION
ORDER CODE
COMMERCIAL RANGE
V
CC
= 5V
±
10%, T
amb
= 0
°
C to +70
°
C
N74F8960N, N748961N
DESCRIPTION
28–pin plastic DIP (300 mil)
1
28–pin PLCC
1
NOTE:
Thermal mounting techiques are recommended.
N74F8960A, N74F8961A
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS
DESCRIPTION
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
A0 – A8
PNP latched inputs
3.5/0.117
70
μ
A/70
μ
A
100
μ
A/100
μ
A
20
μ
A/20
μ
A
20
μ
A/20
μ
A
20
μ
A/20
μ
A
B0 – B8
Data inputs with threshold circuitry
5.0/0.167
OEA
A output enable input (active high)
1.0/0.033
OEB0, OEB1
B output enable inputs (active low)
1.0/0.033
LE
Latch enable input (active low)
1.0/0.033
A0 – A7
3–state outputs
150/40
3mA/24mA
B0 – B7
Open collector outputs
OC/166.7
OC/100mA
NOTES:
1. One (1.0) FAST unit load is defined as: 20
μ
A in the high state and 0.6mA in the low state.
2. OC = Open collector.
相關PDF資料 |
PDF描述 |
|---|---|
| 74F8960 | Octal latched bidirectional Futurebus transceivers(3-State + open-collector)(八鎖存雙向預置總線收發器（三態+開啟集電極）) |
| 74F8962 | 9-Bit latched bidirectional Futurebus transceivers open-collector |
| 74F8963 | 9-Bit latched bidirectional Futurebus transceivers open-collector |
| 74F8965 | 9-Bit address/data Futurebus transceiver, ADT |
| 74F8966 | 9-Bit address/data Futurebus transceiver, ADT |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 74F8962 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:9-Bit latched bidirectional Futurebus transceivers open-collector |
| 74F8963 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:9-Bit latched bidirectional Futurebus transceivers open-collector |
| 74F8965 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:9-Bit address/data Futurebus transceiver, ADT |
| 74F8966 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:9-Bit address/data Futurebus transceiver, ADT |
| 74F899 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:9-Bit Latchable Transceiver with Parity Generator/Checker |
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