LTC1045 Datasheet, PDF (4/20 Pages) Linear Technology – Programmable Micropower Hex Translator/ Receiver/Driver

LTC1045
PIN FUNCTIONS
V_OH (Pin 1): High Level to which the Output Switches.
IN1 to IN7 (Pins 2 to 7): Six Comparator Inputs; Voltage
Range = V ^– to V ^– + 18V.
V_TRIP2 (Pin 8): Trip Point for Last Two Comparators
(Inputs 5,6); Voltage Range = V ^– to V ⁺ – 2V.
V_TRIP1 (Pin 9): Trip Point for First Four Comparators
(Inputs 1 to 4); Voltage Range = V ^– to V ⁺ – 2V.
V ^– (Pin 10): Comparator Negative Supply.
V_OL (Pin 11): Low Level to which the Output Switches.
I_SET (Pin 12): This has three functions: 1) R_SET from this
pin to V ^– sets bias current, 2) when forced to V ⁺ power is
shut off completely and 3) when forced to V ⁺ outputs are
latched.
DISABLE (Pin 13): When high, outputs are Hi-Z.
OUT6 to OUT1 (Pins 14 to 19): Six Driver Outputs.
V ⁺ (Pin 20): Comparator Positive Supply.
TEST CIRCUITS
5V
5V
V_IN
V_TRIP = 1.2V
+ ^V+
V_OH
V_OL
– _V^–
OUTPUT
50pF
1.3V
V_IN 1.2V
1.1V
5V
OUTPUT 2.5V
0V
t_r
t_f
90% 90%
10%
10%
t_d
t_d
t_r = t_f ≤ 10ns
1045 F01
Figure 1. Response Time Test Circuit
V_IN
V_TRIP = 1.2V
100mV
V_IN
V_TRIP
–100mV
5V
I_SET
0V
+
–
t_HOLD
t_SETUP
50%
5V
I_SET
0V
50%
1045 F02
Figure 2. Latch Test Circuit
4
t_IH
V⁺
+
–
10pF
DISABLE
t_OH
V⁺
DISABLE
OUTPUT
10k
V_OL
5V
DISABLE
0V ^10%
5V
OUTPUTS
– 5V
t_r ≤ 10ns
90%
50%
t_IH
90%
1045 F03a
V_OH
10k
OUTPUT
10pF
DISABLE
10%
5V
OUTPUTS
– 5V
t_r ≤ 10ns
90%
50%
t_OH
10%
1045 F03b
DISABLE
t_ACC
DISABLE
OUTPUT
50pF
5V
OUTPUTS
– 5V
90%
50%
t_r ≤ 10ns
10%
t_ACC
1045 F03c
Figure 3. Three-State Output Test Circuit
Conditions: V⁺ = V_OH = 5V, V ^– = V_OL = 0V