•Drives heavily loaded backplanes with equivalent load
impedances down to 10 ohms
•High drive 100mA BTL open collector drivers on B-port
•Allows incident wave switching in heavily loaded backplane buses
•Reduced BTL voltage swing produces less noise and reduces
power consumption
•Built-in precision band-gap reference provides accurate receiver
thresholds and improved noise immunity
•Compatible with IEEE Futurebus+ or proprietary BTL backplanes
•Controlled output ramp and multiple GND pins minimize ground
bounce
•Tight output skew (0.5nsec typical)
•Glitch-free power up/down operation
•Low I
current
CC
•Supports live insertion
•High density packaging
•ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
DESCRIPTION
This transceiver is a 10 bit bidirectional transceiver and is intended
to provide the electrical interface to a high performance wired-OR
bus.
The B-port drivers are Low-capacitance open collectors with
controlled ramp and are designed to sink 100mA. Precision band
gap references on the B-port insure very good margins by limiting
the switching threshold to a narrow region centered at 1.55V .
The B-port interfaces to “Backplane Transceiver Logic” (See the
IEEE 1194.1 BTL standard). BTL features low power consumption
by reducing voltage swing (1V p-p, between 1V and 2V) and
reduced capacitive loading (<6pF) by placing an internal series
diode on the drivers. BTL also provides incident wave switching, a
necessity for high performance backplanes.
To support live insertion, OEB is held Low during power on/off cycles
to insure glitch free B port drivers. Proper bias for B port drivers
during live insertion is provided by the BIAS V pin when at a 5V level
while V
reverse bias the BTL driver series Schottky diode, and also bias the
B port output pins to a voltage between 1.62V and 2.1V . This bias
function is in accordance with IEEE BTL standard 1194.1. If live
insertion is not a requirement, the BIAS V pin should be tied to a
V
The LOGIC GND and BUS GND pins are isolated inside the
package to minimize noise coupling between the BTL and TTL
sides. These pins should be tied to a common ground external to the
package. The LOGIC V
internally to minimize noise and may be externally decoupled
separately or simply tied together.
This transceiver function is intended to operate in a half-duplex
mode. Low current in standby mode is obtained by powering down
unused circuitry. Likewise, transmit circuitry is powered down when
in receive mode and receive circuitry is powered down while in
transmit mode.
is Low. The BIAS V pin is a low current input which will
PACKAGESTEMPERATURE RANGE OUTSIDE NORTH AMERICANORTH AMERICADWG NUMBER
52-PIN PQFP–40°C to +85°C74ABTL3205 BB74ABTL3205 BBSOT379-1
1995 Jun 16853-1802 15352
2
Page 3
Philips SemiconductorsProduct specification
74ABTL320510-bit BTL transceiver with registers
PIN CONFIGURATION
TTL Gnd
TTL GND
TTL GND
AClk2
TTL GND
TTL GND
CC
AClkin
TTL Gnd
AClk1
1
2
A0
A1
3
4
A2
5
6
A3
7
8
9
A4
10
A5
11
12
A6
13
14 15 16 17 18 19 20
A7
TTL Gnd
V
CC
BG V
49505152
APAR
BG GND
BiasV
OEA1
OEA2
464748
21 22 23 24 25 26
AFP
Power Up
OEB
M/S
Mode
IEA
Recmode
V
434445404142
CC
V
Transmode
CC
BUS GND
BUS GND
BClk1
B7
39
38
37
36
35
34
33
32
31
30
29
28
27
BUS GND
B0
B1
BUS GND
B2
B3
BUS GND
BClk2
BUS GND
B4
B5
BUS GND
B6
SA00138
PIN DESCRIPTION
SYMBOLFUNCTIONASSERTIONI/OLOGIC
OEA1Output enable data receiver group 1LowInputTTL
OEA2Output enable data receiver group 2LowInputTTL
OEBOutput enable data transmitterLowInputTTL
IEAOutput enable clock and framepulse receiverLowInputTTL
M/SMaster/Slave select:
Power UpPower up mode, held low during power up to
LowInputTTL
disable clock and data transmitters
RecmodeEnables receiverHighInputTTL
TranmodeEnables transmitterHighInputTTL
AClk1Clock or data pathI/OTTL
AClkln
IEA = H → Input for busclock
IEA = L → Output for busclock
A0..A3data group 1I/OTTL
AClk2Clock or data pathI/OTTL
AFPInAlternate data pathOutputTTL
APARAlternate data pathInputTTL
A4..A7data group 2I/OTTL
BClk1Clock or data pathI/OBTL
B0..B3data group 1I/OBTL
BClk2Clock or data pathI/OBTL
B4..B7data group 2I/OBTL
H = High voltage level
L = Low voltage level
h = High voltage level one set-up time prior to
Low to High ACLKin transition
l= Low voltage level one set-up time prior to
Low to High ACLKin transition
° = Low to High transition
Z = High impedance (off) state
H* = Goes to level of pull-up voltage
X = Don’t care
O = Output
1995 Jun 16
5
Page 6
Philips SemiconductorsProduct specification
VINInput voltage
I
Current applied to output in Low output state
74ABTL320510-bit BTL transceiver with registers
LOGIC SYMBOL (IEEE/IEC)
Recmode
Transmode
Powerup
OEA1
OEA2
OEB
IEA
/S
M
MODE
EN1
EN2
EN3
EN4
EN5
EN6
6C7
&
EN8
AClk1
AClkIn
A0
A1
A2
A3
AClk2
AFP
APAR
A4
A5
A6
A7
1
4
1
7D53
17D 3
17D 3
17D 3
25
4
7D
27D 3
27D 3
27D 3
27D 3
8
BClk1
B0
B1
B2
B3
BClk2
B4
B5
B6
B7
SA00140
ABSOLUTE MAXIMUM RA TINGS
Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted, these limits are over the operating free-air temperature range.
SYMBOL
V
CC
I
IN
V
OUT
OUT
T
amb
T
STG
Supply voltage–0.5 to +7.0V
p
Input current–18 to +5mA
Voltage applied to output in High output state–0.5 to +V
pp
p
Operating free-air temperature range–40 to +85°C
Storage temperature–65 to +150°C
PARAMETERRATINGUNIT
TTL Signals–1.2 to +7.0V
BTL Signals–1.2 to +5.5V
p
A0 - A848mA
B0 - B8200mA
CC
/v
1995 Jun 16
6
Page 7
Philips SemiconductorsProduct specification
1
SYMBOL
PARAMETER
TEST CONDITIONS
1
UNIT
BTL
VIKIn ut clam voltage
BTL
IILLow-level in ut current
74ABTL320510-bit BTL transceiver with registers
DC ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature range unless otherwise noted.
LIMITS
MINTYP
I
OH
I
OFF
V
OH
High level output currentBTL
Power-off output currentBTL
High-level output voltageTTL
VCC = MAX, VIL = MAX,
VIH = MIN, VOH = 1.9V
VCC = 0.0V, VIL = MAX,
VIH = MIN, VOH = 1.9V
VCC = MIN, VIL = MAX,
VIH = MIN, IOH = –3mA
VCC = MIN to MAX,
4
4
2.52.853.4V
VIL = MAX, VIH = MIN,
I
= –10µA
OH
VCC = MIN, VIL = MAX,
VIH = MIN, IOL = 24mA
VCC = MIN, VIL = MAX,
VIH = MIN, IOL = 100mA
VCC = MIN, VIL = MAX,
VIH = MIN, IOL = 4mA
IK
0.751.01.10V
0.50.7V
VCC = MAX,
VI = 0.5V or 5.5V
VCC = MAX, VI = 2.7V,
Bn = AIn = 0V
VCC = MAX, VI = 1.9V0.1100µΑ
VCC = MAX, VI = 3.5V
5
100mA
VCC = MAX13mA
VCC = MAX
Mode = Low
VCC = MAX
Mode = High
VCC = MAX1825mA
VCC = MAX2943mA
V
I
I
I
IH
I
OZH
I
OZL
I
OS
I
CC
OL
TTL
Low-level output voltage
p
p
Input current at maximum
input voltage
TTLVCC = MIN, II = I
BTLVCC = MIN, II = –18mA0.8–1.2V
TTL
TTL
High-level input current
p
TTLVCC = MAX, VI = 0.5V0.1–20µΑ
BTLVCC = MAX, VI = 0.75V0.1–100µΑ
Off-state output currentTTLVCC = MAX, VO = 2.7V0.150µΑ
Off-state output currentTTLVCC = MAX, VO = 0.5V20–50µΑ
Short-circuit output
3
current
TTLVCC = MAX, VO = 0.0V–60130–150mA
Recmode Low
Tranmode Low
Recmode Low
Tranmode High
Supply current (total)
Recmode Low
Tranmode High
Recmode High
Tranmode Low
Recmode High
Tranmode High
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
3. Not more than one output should be shorted at a time. For testing I
= 5V, T
CC
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
amb
= 25°C.
, the use of high-speed test apparatus and/or sample-and-hold
OS
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
4. Due to test equipment limitations, actual test conditions are V
5. For B port input voltage between 3 and 5 volts I
tests should be performed last.
OS
will be greater than 100µA, but the parts will continue to function normally.
HL. Skew times are valid only under same test conditions (temperature, V
2. t
SK
duty cycle. (50MHz input frequency and 50% duty cycle, tested on data paths only).
Bias pin DC currentVCC = 0 to 5.25V, Bn = 0 to 2.0 V4.55.5V
VCC = 0 to 4.75 V, Bn = 0 to 2.0V,
p
Bias V = 4.5 to 5.5V
VCC = 4.5 to 5.5V, Bn = 0 to 2.0 V,
Bias V = 4.5 to 5.5V
1mA
10µA
Bus voltage during prebiasB0 – B8 = 0V, Bias V = 5.0V1.622.1V
A PORT LIMITS
TEST
CONDITION
= +25°C
amb
VCC = 5V
C
= 50pF, CL = 500Ω
L
T
= –40°C to +85°C
amb
VCC = 5V ± 10%
C
= 50pF, CL = 500Ω
L
UNIT
T
MINTYPMAXMINMAX
Propagation delay
Bn to An
Propagation delay,
BCLK1 to ACLK1
Propagation delay
BCLK1 to ACLKin
Propagation delay
BCLK2 to ACLK2
Propagation delay
BCLK2 to AFP
Output Enable time
OEA1, OEA2, IEA to An
Output Disable time
OEA1, OEA2, IEA to An
Output transition time, An Port
10% to 90%, 90% to 10%
– t
2
PLH| MAX
Pulse skew
|t
PHL
Test Circuit and
Waveforms
Waveform 32.0ns
2.03.66.52.0
1.83.56.11.8
7.3
6.7
2.03.86.52.07.3
1.83.66.11.86.7
2.03.76.52.07.3
1.83.76.11.86.7
2.03.76.52.07.3
1.83.96.11.86.7
2.03.86.52.07.3
1.83.96.11.86.7
2.03.86.52.07.3
1.82.56.11.86.7
1.62.55.61.45.7
2.03.37.81.88.2
3.0
1.7
7.0
4.0
ns
actual – tPM actual| for any data input to output path compared to any other data input to output path where N and M are either LH or
, loading, etc.).
(p) is used to quantify duty cycle characteristics. In essence it compares the input signal duty cycle to the corresponding output signal
CC
1995 Jun 16
8
Page 9
Philips SemiconductorsProduct specification
gy
Waveform 2
5.7
ns
gy
Waveform 1, 2
ns
gy
Waveform 1, 2
ns
gy
Waveform 2
ns
gy
Waveform 2
ns
Waveform 1, 2
ns
TLH
Transitiontime,BnPort
TestCircuitand
SYMBOL
PARAMETER
UNIT
Waveform 6
ns
Waveform 6
ns
74ABTL320510-bit BTL transceiver with registers
AC ELECTRICAL CHARACTERISTICS
B PORT LIMITS
T
= +25°C
SYMBOLPARAMETER
TEST
CONDITION
amb
VCC = 5V
C
= 30pF, RU = 18.5Ω
D
MINTYPMAXMINMAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
TLH
t
THL
tSK(p)
Propagation delay
An to Bn
Propagation delay,
ACLKin to Bn
Propagation delay
ACLKin to BCLK2
Propagation delay
ACLK1 to BCLK1
Propagation delay
ACLK2 to BCLK2
Enable/disable time
OEB to Bn or BCLK2
Transition time, Bn PortTest Circuit and
(1.3V to 1.8V)
Pulse skew2
|t
– t
PHL
PLH| MAX
Waveforms
Waveform 32.0ns
1.03.34.71.0
1.02.74.51.0
2.04.65.92.06.3
2.04.55.92.06.3
2.04.67.32.07.6
2.04.57.32.07.6
1.03.24.71.05.1
1.02.94.51.04.7
1.03.15.71.06.0
1.03.15.51.05.6
1.03.86.81.07.6
1.03.46.41.06.9
1.02.51.03.0
0.62.00.62.5
NOTES:
actual – tPM actual| for any data input to output path compared to any other data input to output path where N and M are either LH or
1. |t
PN
HL. Skew times are valid only under same test conditions (temperature, V
(p) is used to quantify duty cycle characteristics. In essence it compares the input signal duty cycle to the corresponding output signal
2. t
SK
duty cycle. (50MHz input frequency and 50% duty cycle, tested on data paths only).
, loading, etc.).
CC
T
= –40°C to +85°C
amb
VCC = 5V ± 10%
C
= 30pF, RU = 18.5Ω
L
UNIT
ns
AC SETUP REQUIREMENTS
ts(H)
ts(L)
th(H)
th(L)
Setup time
An to ACLKin
Hold time
An to ACLKin
TEST
CONDITION
LIMITS
T
= +25°C
amb
VCC = 5V
T
= –40°C to +85°C
amb
VCC = 5V ± 10%
CL = 50pF (A side) / CD = 30pF (B side)
RL = 500Ω (A side) / RU = 18.5Ω (B side)
MINTYPMINMAX
1.92.0
1.31.5
1.82.3
2.02.0
1995 Jun 16
9
Page 10
Philips SemiconductorsProduct specification
74ABTL320510-bit BTL transceiver with registers
AC WAVEFORMS
VM = 1.55V for Bn, VM = 1.5V for all others
OEAn
An
V
M
t
PLH
V
M
V
M
t
PHL
V
M
SA00141
Waveform 1. Propagation Delay for Data or
Output Enable to Output
An, Bn
Bn, An
V
M
t
PHL
V
M
V
M
t
PLH
Waveform 2. Propagation Delay for Data to Output
V
M
SA00142
OEA
An
V
M
t
PZH
V
M
t
PHZ
–0.3V
V
V
M
OH
0V
SA00144
Waveform 4. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
OEA
An
V
M
t
PZL
V
M
t
PLZ
V
M
VOL +0.3V
SA00145
Waveform 5. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
An, Bn
An, Bn
V
M
tSK(0)
Waveform 3. Output Skews
V
M
SA00143
An
or
Bn
ACLKin
VMV
tS(H)th(H)
Waveform 6. Data Setup and Hold Times
V
V
M
M
(L)
t
S
V
M
M
(L)
t
h
V
M
SA00349
1995 Jun 16
10
Page 11
Philips SemiconductorsProduct specification
74ABTL320510-bit BTL transceiver with registers
TEST CIRCUIT AND WAVEFORMS
V
CC
BIAS V
V
PULSE
GENERATOR
IN
D.U.T.
R
T
Test Circuit for 3-State Outputs on A Port
SWITCH POSITION
TESTSWITCH
t
, t
PZL
V
D.U.T.
closed
open
CC
PULSE
GENERATOR
V
IN
PLZ
All other
BIAS V
R
T
V
OUT
C
L
2.0V (for R
2.1V (for RU = 16.5Ω)
V
OUT
= 9Ω)
U
R
C
U
D
R
L
R
L
7.0V
t
90%
NEGATIVE
PULSE
POSITIVE
PULSE
10%
W
V
M
10%10%
t
(tF)
THL
(tR)t
t
TLH
90%90%
V
M
t
W
V
M
V
M
90%
10%
t
TLH
THL
AMP (V)
LOW V
(tR)
(tF)
AMP (V)
LOW V
VM = 1.55V for Bn or Bn, VM = 1.5V for all others
Input Pulse Definition
ABTL
AmplitudeLow VRep. Ratet
INPUT PULSE REQUIREMENTS
W
t
TLHtTHL
A Port3.0V0.0V1MHz500ns 2.5ns 2.5ns
B Port2.0V1.0V1MHz500ns 2.5ns 2.5ns
Test Circuit for Outputs on B Port
DEFINITIONS
R
=Load resistor; see AC CHARACTERISTICS for value.
L
=Load capacitance includes jig and probe capacitance;
C
L
see AC CHARACTERISTICS for value.
R
=Termination resistance should be equal to Z
T
generators.
OUT
of pulse
CD =Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
RU =Pull up resistor;
see AC CHARACTERISTICS for value.
SA00146
1995 Jun 16
11
Page 12
Philips SemiconductorsProduct specification
74ABTL320510-bit BTL transceiver with registers
QFP52:plastic quad flat package; 52 leads (lead length 1.6 mm); body 10 x 10 x 2.0 mmSOT379-1
1995 Jun 16
12
Page 13
Philips SemiconductorsProduct specification
74ABTL320510-bit BTL transceiver with registers
NOTES
1995 Jun 16
13
Page 14
Philips SemiconductorsProduct specification
74ABTL320510-bit BTL transceiver with registers
Data sheet status
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1]
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Copyright Philips Electronics North America Corporation 2000
All rights reserved. Printed in U.S.A.
Date of release: 01-00
Document order number:9397 750 06827
1995 Jun 16
14
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