SN54GTL16612, SN74GTL16612
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
D
Members of the Texas Instruments
Widebus
D
Universal Bus Transceiver (
Family
UBT
Combines D-Type Latches and D-Type
Flip-Flops for Operation in Transparent,
Latched, Clocked, or Clock-Enabled Mode
D
Translate Between GTL/GTL+ Signal Levels
and LVTTL Logic Levels
D
Support Mixed-Mode (3.3 V and 5 V) Signal
Operation on A-Port and Control Inputs
D
Identical to ’16601 Function
D
I
Supports Partial-Power-Down Mode
off
Operation
D
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors on A Port
D
Latch-Up Performance Exceeds 500 mA Per
JESD 17
D
Distributed VCC and GND-Pin Configuration
Minimizes High-Speed Switching Noise
D
Package Options Include Plastic Shrink
Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Ceramic Flat
(WD) Packages
description
The ’GTL16612 devices are 18-bit universal bus
transceivers (UBT) that provide LVTTL-toGTL/GTL+ and GTL/GTL+-to-LVTTL signal-level
translation. They combine D-type flip-flops and
)
SN54GTL16612 . . . WD PACKAGE
SN74GTL16612 . . . DGG OR DL PACKAGE
OEAB
LEAB
V
(3.3 V)
CC
V
(3.3 V)
CC
OEBA
LEBA
A1
GND
A2
A3
A4
A5
A6
GND
A7
A8
A9
A10
A11
A12
GND
A13
A14
A15
A16
A17
GND
A18
(TOP VIEW)
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
CEAB
CLKAB
B1
GND
B2
B3
V
(5 V)
CC
B4
B5
B6
GND
B7
B8
B9
B10
B11
B12
GND
B13
B14
B15
V
REF
B16
B17
GND
B18
CLKBA
CEBA
D-type latches to allow for transparent, latched,
clocked, and clock-enabled modes of data transfer identical to the ’16601 function. The devices provide an
interface between cards operating at L VTTL logic levels and a backplane operating at GTL/GTL+ signal levels.
Higher-speed operation is a direct result of the reduced output swing (<1 V), reduced input threshold levels, and
output edge control (OEC).
The user has the flexibility of using these devices at either GTL (V
higher noise margin GTL+ (VTT = 1.5 V and V
= 1 V) signal levels. GTL+ is the T exas Instruments derivative
REF
= 1.2 V and V
TT
= 0.8 V) or the preferred
REF
of the Gunning transceiver logic (GTL) JEDEC standard JESD 8-3. The B port normally operates at GTL or
GTL+ signal levels, while the A-port and control inputs are compatible with LVTTL logic levels and are 5-V
tolerant. V
(5 V) supplies the internal and GTL circuitry while VCC (3.3 V) supplies the LVTTL output buffers.
V
CC
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.
Widebus, UBT, and OEC are trademarks of 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.
is the reference input voltage for the B port.
REF
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1999, Texas Instruments Incorporated
1
SN54GTL16612, SN74GTL16612
MODE
Latched storage of A data
Transparent
Clocked storage of A data
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
description (continued)
Data flow in each direction is controlled by output-enable (OEAB and OEBA), latch-enable(LEAB and LEBA),
and clock (CLKAB and CLKBA) inputs. The clock can be controlled by the clock-enable (CEAB and CEBA)
inputs. For A-to-B data flow, the devices operate in the transparent mode when LEAB is high. When LEAB is
low, the A data is latched if CEAB
data is stored in the latch/flip-flop on the low-to-high transition of CLKAB if CEAB also is low. When OEAB is
low, the outputs are active. When OEAB is high, the outputs are in the high-impedance state. Data flow for B
to A is similar to that for A to B, but uses OEBA, LEBA, CLKBA, and CEBA.
is low and CLKAB is held at a high or low logic level. If LEAB is low, the A
These devices are fully specified for partial-power-down applications using I
. The I
off
circuitry disables the
off
outputs, preventing damaging current backflow through the device when it is powered down.
Active bus-hold circuitry holds unused or undriven L VTTL inputs at a valid logic state. Use of pullup or pulldown
resistors with the bus-hold circuitry is not recommended.
The SN54GTL16612 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74GTL16612 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
CEAB OEAB LEAB CLKAB A
X H X X X Z Isolation
L L L H X B
L LL LXB
X L H X L L
X LH XH H
L L L ↑ L L
L LL ↑ HH
H L L X X B
†
A-to-B data flow is shown. B-to-A data flow is similar but uses OEBA, LEBA, CLKBA,
and CEBA
‡
Output level before the indicated steady-state input conditions were established, provided
that CLKAB was high before LEAB went low
§
Output level before the indicated steady-state input conditions were established
.
†
OUTPUT
B
‡
0
§
0
§
0
p
Clock inhibit
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
SN54GTL16612, SN74GTL16612
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
V
REF
OEAB
CEAB
CLKAB
LEAB
LEBA
CLKBA
CEBA
OEBA
A1
35
1
56
55
2
28
30
29
27
3
CLK
CE
1D
C1
CE
1D
C1
CLK
54
B1
To 17 Other Channels
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
SN54GTL16612, SN74GTL16612
UNIT
VCCSuppl
oltage
V
V
V
V
Suppl
oltage
V
VIInput voltage
V
V
g
V
V
V
I
mA
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC: 3.3 V –0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 V –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
Voltage range applied to any output in the high or power-off state, V
(see Note 1): A port –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state, I
Current into any A-port output in the high state, I
Continuous current through each VCC or GND ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
Output clamp current, I
Package thermal impedance, θJA (see Note 3): DGG package 64°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
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. This current flows only when the output is in the high state and VO > VCC.
3. The package thermal impedance is calculated in accordance with JESD 51.
(see Note 1): A-port and control inputs –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . .
I
B port and V
–0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REF
O
B port –0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
: A port 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
B port 80 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2) 64 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
(V
< 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IK
I
(V
OK
< 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
DL package 56°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
†
recommended operating conditions (see Notes 4 through 6)
SN54GTL16612 SN74GTL16612
MIN NOM MAX MIN NOM MAX
pp
y v
Termination
TT
voltage
pp
REF
IH
IL
I
IK
I
OH
OL
T
A
NOTES: 4. All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
y v
p
High-level
input voltage
Low-level
input voltage
Input clamp current –18 –18 mA
High-level
output current
Low-level
output current
Operating free-air temperature –55 125 –40 85 °C
Implications of Slow or Floating CMOS Inputs
5. Normal connection sequence is GND first, VCC = 5 V second, and VCC = 3.3 V , I/O, control inputs, VTT and V
6. VTT and RTT can be adjusted to accommodate backplane impedances as long as they do not exceed the DC absolute IOL ratings.
Similarly , V
3.3 V 3.15 3.3 3.45 3.15 3.3 3.45
5 V 4.75 5 5.25 4.75 5 5.25
GTL 1.14 1.2 1.26 1.14 1.2 1.26
GTL+
GTL 0.74 0.8 0.87 0.74 0.8 0.87
GTL+ 0.87 1 1.1 0.87 1 1.1
B port V
Except B port 5.5 5.5
B port V
Except B port
B port V
Except B port
A port –32 –32 mA
A port 64 64
B port
can be adjusted to optimize noise margins, but normally is 2/3 VTT.
REF
1.35 1.5 1.65 1.35 1.5 1.65
TT
+50 mV V
REF
2 2
–50 mV V
REF
0.8 0.8
40 40
, literature number SCBA004.
REF
+50 mV
REF
V
TT
–50 mV
(any order) last.
REF
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
UNIT
CC
() ,
A port
CC
() ,
I
V
CC
V
µ
B port
CC
() ,
()
V
CC
V
I
A
I
A
V
CC
3V) = 3.45 V
(3.3V)
ort
V
CC
3V) = 3.45 V
(5 V)
ort
C
V
3.15 V or 0
pF
SN54GTL16612, SN74GTL16612
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54GTL16612 SN74GTL16612
MIN TYP†MAX MIN TYP†MAX
V
IK
V
V
I
I
off
I
I(hold)
OZH
OZL
I
CC
I
CC
∆I
C
†
All typical values are at VCC (3.3 V) = 3.3 V, VCC (5 V) = 5 V, TA = 25°C.
‡
This is the bus-hold maximum dynamic current. It is the minimum overdrive current required to switch the input from one state to another.
§
This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
A port
OH
OL
B port VCC (3.3 V) = 3.15 V, VCC (5 V) = 4.75 V, IOL = 40 mA 0.5 0.4
Control
inputs
A port
A port
A port VCC (3.3 V) = 3.45 V, VCC (5 V) = 5.25 V, VO = 3 V 1 1
B port VCC (3.3 V) = 3.45 V, VCC (5 V) = 5.25 V, VO = 1.2 V 10 10
A port VCC (3.3 V) = 3.45 V, VCC (5 V) = 5.25 V, VO = 0.5 V –1 –1
B port VCC (3.3 V) = 3.45 V, VCC (5 V) = 5.25 V, VO = 0.4 V –10 –10
A or B
p
A or B
p
§
CC
Control
i
inputs
A port
io
B port
VCC (3.3 V) = 3.15 V,
VCC (5 V) = 4.75 V
VCC (3.3 V)= 3.15 V to 3.45 V,
VCC (5 V) = 4.75 V to 5.25 V
V
(3.3 V) = 3.15 V,
VCC (5 V) = 4.75 V
V
p
p
(3.3 V) = 3.15 V,
VCC (5 V) = 4.75 V
VCC (3.3 V) = 0 or 3.45 V,
VCC (5 V) = 0 or 5.25 V
VCC (3.3 V) = 3.45 V,
(5 V) = 5.25
V
(3.3 V) = 3.45 V,
VCC (5 V) = 5.25 V
VCC = 0, VI or VO = 0 to 4.5 V 1000 100 µA
VCC (3.3 V) = 3.15 V,
(5 V) = 4.75
=
(3.
VCC (5 V) = 5.25 V, IO = 0,
VI = VCC (3.3 V) or GND
(3.
VCC (5 V) = 5.25 V, IO = 0,
VI = VCC (3.3 V) or GND
VCC (3.3 V) = 3.45 V, VCC (5 V) = 5.25 V,
A-port or control inputs at VCC (3.3 V) or GND,
One input at 2.7 V
VI = 3.15 V or 0 3.5 12 3.5 pF
=
O
,
=
,
II = –18 mA –1.2 –1.2 V
IOH = –100 µA VCC (3.3 V)–0.2 VCC (3.3 V)–0.2
IOH = –8 mA 2.4 2.4
IOH = –32 mA 2 2
IOL = 100 µA 0.2 0.2
IOL = 16 mA 0.4 0.4
IOL = 32 mA 0.5 0.5
IOL = 64 mA 0.6 0.55
VI = 5.5 V 10 10
VI = 5.5 V 1000 20
VI = VCC (3.3 V) 1 1
VI = 0 –30 –30
VI = VCC (3.3 V) 5 5
VI = 0 –5 –5
VI = 0.8 V 75 75
VI = 2 V –75 –75
VI = 0 to VCC (3.3 V)
Outputs high 1 1
Outputs low 5 5
Outputs disabled 1 1
Outputs high 120 120
Outputs low 120 120
Outputs disabled 120 120
‡
±500 ±500
1 1 mA
12 18 12
10 5
V
V
µA
µA
µ
µ
mA
mA
p
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
SN54GTL16612, SN74GTL16612
UNIT
twPulse duration
ns
tsuSetup time
ns
thHold time
ns
PARAMETER
UNIT
A
B
ns
LEAB
B
ns
CLKAB
B
ns
OEAB
B
ns
B
A
ns
LEBA
A
ns
CLKBA
A
ns
OEBA
A
ns
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
timing requirements over recommended ranges of supply voltage and operating free-air
temperature, V
f
clock
Clock frequency 0 95 0 95 MHz
p
= 1.2 V and V
TT
= 0.8 V for GTL (unless otherwise noted) (see Figure 1)
REF
SN54GTL16612 SN74GTL16612
MIN MAX MIN MAX
LEAB or LEBA high 3.3 3.3
CLKAB or CLKBA high or low 5.6 5.6
A before CLKAB↑ 1.3 1.3
B before CLKBA↑ 3.4 2.5
A before LEAB↓ 1.2 0
B before LEBA↓ 1 1
CEAB before CLKAB↑ 2.1 2
CEBA before CLKBA↑ 2.6 2.2
A after CLKAB↑ 2.9 1.6
B after CLKBA↑ 4.1 0.3
A after LEAB↓ 4.5 4
B after LEBA↓ 4.3 3.6
CEAB after CLKAB↑ 2 0.8
CEBA after CLKBA↑ 1.1 1.1
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, V
f
max
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
en
t
dis
t
r
t
f
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
en
t
†
All typical values are at VCC (3.3 V) = 3.3 V, VCC (5 V) = 5 V, TA = 25°C.
dis
= 1.2 V and V
TT
Transition time, B outputs (0.5 V to 1 V) 1.3 1.3 ns
Transition time, B outputs (1 V to 0.5 V) 0.5 0.5 ns
FROM TO
(INPUT) (OUTPUT)
= 0.8 V for GTL (see Figure 1)
REF
SN54GTL16612 SN74GTL16612
MIN TYP†MAX MIN TYP†MAX
95 95 MHz
1 2.8 4.5 1.5 2.8 4.1
1 2.5 4.5 1.3 2.5 4
1 3.6 5.5 2 3.6 5.3
1 3.5 6 1.9 3.5 5.4
1 3.7 5.5 2.3 3.7 5.3
1 3.4 5.5 1.9 3.4 5.4
1 3.3 5.5 2 3.3 5.5
1 3.4 5.5 2 3.4 5.1
2 4.1 6.9 2.1 4.1 6.3
1 2.9 5.1 1.2 2.9 4.6
2 3.7 6.1 2.3 3.7 5.7
1 3 5.1 1.8 3 4.8
2 3.8 6.4 2.5 3.8 6.1
2 3.3 5.6 2.3 3.3 5.2
1 5 7.5 2.3 5 7.4
2 4.3 6.9 2.5 4.3 6.4
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
UNIT
twPulse duration
ns
tsuSetup time
ns
thHold time
ns
PARAMETER
UNIT
A
B
ns
LEAB
B
ns
CLKAB
B
ns
OEAB
B
ns
B
A
ns
LEBA
A
ns
CLKBA
A
ns
OEBA
A
ns
SN54GTL16612, SN74GTL16612
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
timing requirements over recommended ranges of supply voltage and operating free-air
temperature, V
f
clock
Clock frequency 0 95 0 95 MHz
p
= 1.5 V and V
TT
= 1 V for GTL+ (unless otherwise noted) (see Figure 1)
REF
SN54GTL16612 SN74GTL16612
MIN MAX MIN MAX
LEAB or LEBA high 3.3 3.3
CLKAB or CLKBA high or low 5.6 5.6
A before CLKAB↑ 1.3 1.3
B before CLKBA↑ 3.2 2.3
A before LEAB↓ 1.2 0
B before LEBA↓ 1.3 1.3
CEAB before CLKAB↑ 2.1 2
CEBA before CLKBA↑ 2.6 2.2
A after CLKAB↑ 2.9 1.6
B after CLKBA↑ 4.4 0.3
A after LEAB↓ 4.5 4
B after LEBA↓ 4.3 3.6
CEAB after CLKAB↑ 2 0.8
CEBA after CLKBA↑ 1.1 1.1
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, V
f
max
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
r
t
f
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
en
t
†
All typical values are at VCC (3.3 V) = 3.3 V, VCC (5 V) = 5 V, TA = 25°C.
dis
= 1.5 V and V
TT
Transition time, B outputs (0.5 V to 1 V) 1.5 1.5 ns
Transition time, B outputs (1 V to 0.5 V) 0.8 0.8 ns
FROM TO
(INPUT) (OUTPUT)
= 1 V for GTL+ (see Figure 1)
REF
SN54GTL16612 SN74GTL16612
MIN TYP†MAX MIN TYP†MAX
95 95 MHz
1 2.8 4.5 1.5 2.8 4.1
1 2.5 4.6 1.3 2.5 4.1
1 3.6 5.5 2 3.6 5.3
1 3.5 6.1 1.9 3.5 5.5
1 3.7 5.5 2.3 3.7 5.3
1 3.4 5.6 1.9 3.4 5.5
1 3.4 5.5 2 3.4 5.1
1 3.3 5.6 2 3.3 5.6
1.9 4 6.9 2 4 6.3
0.9 2.8 4.9 1.1 2.8 4.4
2 3.7 6.1 2.3 3.7 5.7
1 3 5.1 1.8 3 4.8
2 3.8 6.4 2.5 3.8 6.1
2 3.3 5.6 2.3 3.3 5.2
1 5 7.5 2.3 5 7.4
2 4.3 6.9 2.5 4.3 6.4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
7
SN54GTL16612, SN74GTL16612
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480I – JUNE 1994 – REVISED NOVEMBER 1999
PARAMETER MEASUREMENT INFORMATION
= 1.2 V , V
V
TT
= 0.8 V FOR GTL AND VTT = 1.5 V , V
REF
= 1 V FOR GTL+
REF
From Output
Under Test
CL = 50 pF
(see Note A)
Input
Input
(see Note B)
Output
Input
(see Note B)
Output
500 Ω
500 Ω
LOAD CIRCUIT FOR A OUTPUTS
VM VV
VOLTAGE WAVEFORMS
(VM = 1.5 V for A port and V
t
PLH
t
PLH
PULSE DURATION
1.5 V 1.5 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
(A port to B port)
V
REF
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
(B port to A port)
S1
t
w
REF
V
REF
†
1.5 V 1.5 V
†
6 V
Open
GND
V
M
for B port)
V
REF
†
V
t
PHL
REF
t
PHL
3 V
0 V
3 V
0 V
V
V
V
0 V
V
V
TT
OL
TT
OH
OL
TEST
t
PLH/tPHL
t
PLZ/tPZL
t
PHZ/tPZH
Data Input
Data Input
(see Note B)
Waveform 1
(see Note C)
Waveform 2
S1 at GND
(see Note C)
Timing
Input
A Port
B Port
Output
Control
Output
S1 at 6 V
Output
S1
Open
6 V
GND
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
t
PZL
t
PZH
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
From Output
Under Test
CL = 30 pF
(see Note A)
LOAD CIRCUIT FOR B OUTPUTS
1.5 V
t
su
1.5 V
V
REF
1.5 V 1.5 V
1.5 V
1.5 V
(A port)
t
h
V
TT
25 Ω
Test
Point
V
REF
t
PLZ
VOL + 0.3 V
t
PHZ
VOH – 0.3 V
3 V
0 V
3 V
0 V
V
TT
0 V
3 V
0 V
3 V
V
OL
V
OH
≈0 V
†
All control inputs are TTL levels
NOTES: A. CL includes probe and jig capacitance.
B. 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.
C. 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.
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveform
8
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