IBM 1 Series - Page 71

2-60 GA34-0033
Type and
element
A-D
receiver
A-E
driver
A-F
driver
A-G
receiver
(without
resistor)
Parameter
High-level
input
Low-level
input
High-level
output
Low-level
output
High-level
output
Low-level
output
High-level
input
Low-level
input
Test
condition
(volts)
at node
2.4
0.4 (Note 3)
0
2.4
0.45 (Note 1)
2.4
0.6 (Note 1)
2.4
0.4
General unit
load- |
current (mA)
min max
+0.03
| —0.75
—0.93
+0.150
+16
—0.4
+16
+0.04
—1.6
TTL unit
load-
current (mA) |
min max —
+0.04
—1.6
+0.250 |
+16
—0.4
+16
+0.04
—1.6
Notes: The information in this section describes the specifications for a unit load on
the channel. The specifications apply to an operating range of 0°C to 70°C. Each unit
driver and receiver must be no more than one physical element. For example, two
half-unit load receivers should not be used in lieu of a one-unit load receiver. Test
conditions assume that the supply voltage (Voc) is at maximum or minimum value to
produce worst-case conditions. The operating limits of Vag are +10 percent.
1. Test conditions of less than the listed voltage, with the specified sink capability,
also satisfies the specification.
2. The unit-load current versus test-condition voltage is highly nonlinear. Types A-A,
A-B, and A-C receivers need not be conditioned if the receiver always satisfies the
conditioned inactive unit-load current for a test condition of from 0.0 to 0.45 volt.
See “Receiver Conditioning” in this section for further explanation of
conditioning.
3. The general unit-load current may be computed at any other test-condition voltage
by linear extrapolation, using the two points given.
Figure 2-26 (Part 2 of 2). Unit-load driver /receiver specifications