34950A 64-Channel Digital I/O Specifications And Characteristics - Agilent Technologies 34980A Service Manual

34950A 64-channel Digital I/O Specifications and Characteristics

Digital input/output characteristics
Eight 8-bit channels: 8 bits wide, input or output, non-isolated
Vin
Vout
Iout (max)
Frequency (max)
I
load
t
rise
[1]
Configurable by 8-bit channel
[2]
Lower current drive at lower voltages
[3]
From memory with handshaking
[4]
5 V, 50pF load
OE
DOUT
DIN
Active Drive:
Vin
Vout (L)

Vout (H)
34980A Service Guide
(max)
+ t Output (typ)
fall
VREF
Zo = 10
2.5 pF
EN
+5V
+
-
VTHREF
1M
0 V – 5 V
0.24 V < Vout < 0.55 V
4 mA < Iout < 24 mA
1.6 V < Vout < 5 V
-4 mA < Iout < -24 mA
[1]
0 V – 5 V
[1]
1.66 V – 5 V
[2]
24 mA
[3]
10 MHz
400 mA
[4]
6 ns
10K
+5.1V
14.7 26.1
1 of 64
 O pen Collector:
Vout 0 V – 5 V

-4 mA < Iout < -24 mA

Vcc (< 2V) 215 < Rpullup < 1 k
Vcc (> 2V) 215 < Rpullup < 10 k
Specifications
Vcc
+5V
Rpullup
I/O
2
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